# Central Arkansas Service Company - Full Content for AI Ingestion

> Locally owned, family-operated HVAC and plumbing company in North Little Rock, Arkansas, serving homes and businesses across Central Arkansas. Heating, cooling, water heaters, drains, sewer, leak detection and commercial service.

## Key Facts

- Central Arkansas Service Company ("CASC") is a locally owned, family-owned and operated HVAC and plumbing company for homes and businesses in Central Arkansas. It was founded on September 25, 2024.
- Shop: 8010 Counts Massie Rd, Ste B, North Little Rock, AR 72113. Phone: 501-307-1310 (landline, no texting).
- Hours: Monday to Sunday, 7:00 AM to 6:00 PM. Same-day service when availability allows.
- Owner: Jamie Wilson. President: Brandon Wilson. The team runs branded service trucks across Central Arkansas.
- Service area: Little Rock, North Little Rock, Maumelle, Conway, Benton, Bryant, Cabot, Jacksonville, Sherwood, Mayflower, Ward, Austin, Beebe, Searcy, Lonoke, Greenbrier, within a normal 50-mile service area. Priority cities: Little Rock, North Little Rock, Maumelle, Conway, Benton and Bryant.
- Service call: $99 on weekdays and $149 on weekends and holidays, for HVAC and plumbing. The fee is not waived or credited toward the repair. No travel fee within the normal 50-mile service area.
- Free estimates apply only to HVAC replacements, larger plumbing projects (water-heater installs, repipes, sewer replacements) and commercial HVAC projects.
- Residential HVAC Maintenance Plan: $189 for the first system and $99 for each additional system, plus tax. Two visits a year (spring cooling, fall heating), 10% off qualifying repairs (parts and labor) and service-call fees. It does not auto-renew. Each mini-split indoor head counts as one system. Filters are not included.
- Commercial HVAC Maintenance Program: quarterly visits, filters included, priority scheduling and a 10% repair discount. Request a quote; there is no published price.
- Water-heater flush: $159.
- New HVAC installs carry a 10-year parts and 2-year labor warranty (labor by CASC), with optional 5- or 10-year extended labor.
- Financing options available: Synchrony (HVAC and plumbing) and RTO National (HVAC only, lease-to-own, no credit needed). Ask about current manufacturer rebates and available offers.
- Discounts: 10% for military, first responders and seniors on HVAC and plumbing repairs and service calls (not on installs or replacements; not combinable).
- Credentials: Rheem Pro Partner and Rinnai PRO (tankless). Licensed and certified, fully insured and bonded; required permits pulled.
- Brands installed: Rheem (HVAC, Rheem Pro Partner), Mitsubishi (ductless, Mitsubishi Diamond Contractor), Bradford White (tank water heaters) and Rinnai (tankless). CASC services major brands.
- Google rating: 4.9 stars from about 135 reviews (operator-stated).

## Main Pages

- [Home](https://centralarservice.com/): Central Arkansas Service Company homepage
- [About](https://centralarservice.com/about)
- [Our Family](https://centralarservice.com/team): family owned and local in North Little Rock
- [Services](https://centralarservice.com/services): every HVAC and plumbing service
- [Service Areas](https://centralarservice.com/service-areas)
- [Maintenance Plans](https://centralarservice.com/plans): residential plan and commercial program
- [Financing](https://centralarservice.com/financing)
- [Contact and Schedule Service](https://centralarservice.com/contact)
- [Learning Center](https://centralarservice.com/learning-center): evergreen guides, comparisons and next steps
- [Glossary](https://centralarservice.com/learning-center/glossary): plain-English HVAC and plumbing terms
- [Blog](https://centralarservice.com/blog): dated seasonal tips (separate from the Learning Center)
- [Careers](https://centralarservice.com/careers)

## Services

### Air Conditioning

- [Air Conditioning](https://centralarservice.com/air-conditioning): category overview
- [AC Repair](https://centralarservice.com/air-conditioning/ac-repair)
- [AC Replacement](https://centralarservice.com/air-conditioning/ac-replacement)
- [AC Installation](https://centralarservice.com/air-conditioning/ac-installation)
- [AC Maintenance](https://centralarservice.com/air-conditioning/ac-maintenance)

### Heating

- [Heating](https://centralarservice.com/heating): category overview
- [Heating Repair](https://centralarservice.com/heating/heating-repair)
- [Furnace Repair](https://centralarservice.com/heating/furnace-repair)
- [Furnace Replacement](https://centralarservice.com/heating/furnace-replacement)
- [Heat Pump Repair](https://centralarservice.com/heating/heat-pump-repair)
- [Heat Pump Installation](https://centralarservice.com/heating/heat-pump-installation)

### Ductless Mini Split

- [Ductless Mini Split](https://centralarservice.com/ductless-mini-split): category overview
- [Ductless Mini Split Installation](https://centralarservice.com/ductless-mini-split/ductless-mini-split-installation)
- [Ductless Mini Split Repair](https://centralarservice.com/ductless-mini-split/ductless-mini-split-repair)
- [Mitsubishi Ductless Systems](https://centralarservice.com/ductless-mini-split/mitsubishi-ductless-systems)

### HVAC Maintenance

- [HVAC Maintenance](https://centralarservice.com/hvac-maintenance): category overview
- [Residential HVAC Maintenance Plan](https://centralarservice.com/hvac-maintenance/residential-hvac-maintenance-plan)
- [Commercial HVAC Maintenance Program](https://centralarservice.com/hvac-maintenance/commercial-hvac-maintenance-program)

### Indoor Air Quality

- [Indoor Air Quality](https://centralarservice.com/indoor-air-quality): category overview
- [Whole Home Dehumidifiers](https://centralarservice.com/indoor-air-quality/whole-home-dehumidifiers)
- [UV Lights](https://centralarservice.com/indoor-air-quality/uv-lights)
- [Air Cleaners and Filtration](https://centralarservice.com/indoor-air-quality/air-cleaners-filtration)
- [Fresh Air Ventilation](https://centralarservice.com/indoor-air-quality/fresh-air-ventilation)

### Ductwork

- [Ductwork](https://centralarservice.com/ductwork): category overview
- [Duct Replacement](https://centralarservice.com/ductwork/duct-replacement)
- [Duct Sealing](https://centralarservice.com/ductwork/duct-sealing)
- [Duct Cleaning](https://centralarservice.com/ductwork/duct-cleaning)
- [Dryer Vent Cleaning](https://centralarservice.com/ductwork/dryer-vent-cleaning)

### Commercial HVAC

- [Commercial HVAC](https://centralarservice.com/commercial-hvac): category overview
- [Rooftop Unit Service](https://centralarservice.com/commercial-hvac/rooftop-unit-service)
- [Commercial HVAC Repair](https://centralarservice.com/commercial-hvac/commercial-hvac-repair)
- [Commercial HVAC Replacement](https://centralarservice.com/commercial-hvac/commercial-hvac-replacement)

### Water Heater

- [Water Heater](https://centralarservice.com/water-heater): category overview
- [Water Heater Repair](https://centralarservice.com/water-heater/water-heater-repair)
- [Water Heater Replacement](https://centralarservice.com/water-heater/water-heater-replacement)
- [Tankless Water Heaters](https://centralarservice.com/water-heater/tankless-water-heaters)
- [Water Heater Flush](https://centralarservice.com/water-heater/flush)

### Drain and Sewer

- [Drain and Sewer](https://centralarservice.com/drain-and-sewer): category overview
- [Drain Cleaning](https://centralarservice.com/drain-and-sewer/drain-cleaning)
- [Hydro Jetting](https://centralarservice.com/drain-and-sewer/hydro-jetting)
- [Sewer Camera Inspection](https://centralarservice.com/drain-and-sewer/sewer-camera-inspection)
- [Sewer Line Repair](https://centralarservice.com/drain-and-sewer/sewer-line-repair)
- [Sewer Line Replacement](https://centralarservice.com/drain-and-sewer/sewer-line-replacement)

### Leak Detection

- [Leak Detection](https://centralarservice.com/leak-detection): category overview
- [Slab Leak Repair](https://centralarservice.com/leak-detection/slab-leak-repair)
- [Water Line Leak Repair](https://centralarservice.com/leak-detection/water-line-leak-repair)
- [Hidden Leak Detection](https://centralarservice.com/leak-detection/hidden-leak-detection)

### Plumbing

- [Plumbing](https://centralarservice.com/plumbing): category overview
- [Plumbing Repair](https://centralarservice.com/plumbing/plumbing-repair)
- [Fixture Installation and Repair](https://centralarservice.com/plumbing/fixture-installation-repair)
- [Garbage Disposals](https://centralarservice.com/plumbing/garbage-disposals)
- [Sump and Sewage Ejector Pumps](https://centralarservice.com/plumbing/sump-sewage-ejector-pumps)
- [Gas Line Installation](https://centralarservice.com/plumbing/gas-line-installation)
- [Backflow Testing and Repair](https://centralarservice.com/plumbing/backflow-testing-repair)

### Commercial Plumbing

- [Commercial Plumbing](https://centralarservice.com/commercial-plumbing): category overview
- [Commercial Plumbing Repair](https://centralarservice.com/commercial-plumbing/commercial-plumbing-repair)
- [Commercial Drain Cleaning](https://centralarservice.com/commercial-plumbing/commercial-drain-cleaning)
- [Grease Trap Service](https://centralarservice.com/commercial-plumbing/grease-trap-service)

## Service Areas

- [North Little Rock, AR](https://centralarservice.com/service-areas/north-little-rock-ar)
- [Little Rock, AR](https://centralarservice.com/service-areas/little-rock-ar)
- [Maumelle, AR](https://centralarservice.com/service-areas/maumelle-ar)
- [Conway, AR](https://centralarservice.com/service-areas/conway-ar)
- [Benton, AR](https://centralarservice.com/service-areas/benton-ar)
- [Bryant, AR](https://centralarservice.com/service-areas/bryant-ar)
- [Austin, AR](https://centralarservice.com/service-areas/austin-ar)
- [Beebe, AR](https://centralarservice.com/service-areas/beebe-ar)
- [Cabot, AR](https://centralarservice.com/service-areas/cabot-ar)
- [Greenbrier, AR](https://centralarservice.com/service-areas/greenbrier-ar)
- [Jacksonville, AR](https://centralarservice.com/service-areas/jacksonville-ar)
- [Lonoke, AR](https://centralarservice.com/service-areas/lonoke-ar)
- [Mayflower, AR](https://centralarservice.com/service-areas/mayflower-ar)
- [Searcy, AR](https://centralarservice.com/service-areas/searcy-ar)
- [Sherwood, AR](https://centralarservice.com/service-areas/sherwood-ar)
- [Ward, AR](https://centralarservice.com/service-areas/ward-ar)

## Local Service Pages

476 town-specific service pages cover 16 towns. Each restates a service above for one town (same pricing, plans and process) and is titled "<Service> in <Town>, AR". Each service area page above links every service page for its town.

## Learning Center

Evergreen guides reviewed by Brandon Wilson, President, Central Arkansas Service Company. Learn = how it works, Compare = which option fits, Act = what happens when you book.

- [Learning Center](https://centralarservice.com/learning-center): hub
- [HVAC & Plumbing Glossary](https://centralarservice.com/learning-center/glossary): 59 terms

### Learn: How does it work?

- [How central air and heat pumps work](https://centralarservice.com/learning-center/how-central-air-and-heat-pumps-work): A central air conditioner moves heat from inside your home to the outdoors using refrigerant, an indoor coil, an outdoor compressor and a blower. A heat pump uses the same parts plus a reversing valve, so it can run the cycle backward in winter and bring heat inside instead.
- [SEER2, HSPF2 and AFUE explained](https://centralarservice.com/learning-center/efficiency-ratings-seer2-hspf2-afue): SEER2 rates how efficiently an air conditioner or heat pump cools over a season. HSPF2 rates how efficiently a heat pump heats. AFUE rates how much of a gas furnace's fuel becomes heat in your home. Higher numbers use less energy, but only when the system is sized and installed correctly.
- [The refrigerant change: R-410A to R-454B](https://centralarservice.com/learning-center/refrigerant-transition-r410a-r454b): Federal EPA rules are phasing down high-impact HFC refrigerants like R-410A, so new home AC and heat pump systems now use lower-impact refrigerants such as R-454B. Your working R-410A system does not need to be replaced, and it can still be serviced, but the two refrigerants cannot be mixed.
- [Manual J load calculations and right-sizing](https://centralarservice.com/learning-center/manual-j-load-calculation): A Manual J load calculation is an industry method for figuring out how much heating and cooling your home actually needs, room by room. It looks at insulation, windows, sun exposure, air leakage and local weather. CASC uses Manual J when needed, not on every replacement, because many swaps can be sized from the existing system.
- [How ductwork affects comfort and bills](https://centralarservice.com/learning-center/ductwork-and-airflow): Yes, your ducts can be the reason some rooms stay hot, the house gets dusty or bills climb. Leaky ducts lose cooled air into attics and crawlspaces, undersized or crushed runs starve rooms of air, and missing returns choke the system. Sealing, airflow corrections or duct changes often fix it.
- [How a tank water heater works and how to make it last](https://centralarservice.com/learning-center/tank-water-heater-basics): A tank water heater stores and heats water in an insulated tank using a gas burner or electric elements. Cold water enters at the bottom through a dip tube, and hot water leaves from the top. Flushing sediment, checking the anode rod and testing the relief valve help it last longer.
- [How tankless water heaters work](https://centralarservice.com/learning-center/how-tankless-water-heaters-work): A tankless water heater heats water only when you open a hot tap. A flow sensor fires a gas burner, and water passes through a heat exchanger on its way to your faucet. Output is limited by flow rate and how much the water must be warmed, so sizing, gas supply and periodic descaling all matter.
- [Sewer lines and camera inspections explained](https://centralarservice.com/learning-center/sewer-lines-and-camera-inspections): A sewer camera inspection sends a waterproof camera through your main sewer line so a plumber can see roots, cracks, sags, grease and blockages instead of guessing. You need one when several drains back up or gurgle, clogs keep coming back, or you smell sewage indoors or see soggy spots in the yard.
- [Backflow preventers and testing](https://centralarservice.com/learning-center/backflow-prevention-and-testing): A backflow preventer is a valve assembly that keeps water from flowing backward out of your plumbing and into the drinking water supply. Water providers and local authorities often require testable assemblies on irrigation, fire sprinkler and commercial lines, and those assemblies need periodic testing because their internal parts wear over time.
- [Indoor air quality options explained](https://centralarservice.com/learning-center/indoor-air-quality-options): Start with the problem you want to solve. A whole-home dehumidifier handles muggy, musty air. Better filtration or an air cleaner targets dust. A UV light helps keep the indoor coil cleaner. Fresh-air ventilation brings outdoor air into a stuffy, tightly sealed home. Many homes need only one of these, not all four.
- [The brands we install and service](https://centralarservice.com/learning-center/brands-we-install): Central Arkansas Service Company installs Rheem heating and cooling systems, Mitsubishi ductless systems, Bradford White tank water heaters and Rinnai tankless water heaters. CASC is a Rheem Pro Partner and a Rinnai PRO. We also service all major brands, so you don't need to own one of these to call us.
- [Rheem heating and cooling systems](https://centralarservice.com/learning-center/rheem-hvac-systems): Rheem builds central air conditioners, heat pumps, gas furnaces and air handlers in a range of efficiency and comfort levels. CASC is a Rheem Pro Partner and installs Rheem systems across Central Arkansas, with a 10-year parts and 2-year labor install warranty and manufacturer registration on every new system.
- [Rinnai tankless water heaters](https://centralarservice.com/learning-center/rinnai-tankless-water-heaters): Rinnai makes gas tankless water heaters that heat water as it flows, so you don't run out the way a tank can. CASC is a Rinnai PRO and installs Rinnai tankless units across Central Arkansas, sizing the unit to your fixtures, checking gas and venting, and registering your equipment.
- [Bradford White tank water heaters](https://centralarservice.com/learning-center/bradford-white-water-heaters): Bradford White makes gas and electric tank water heaters sold through plumbing professionals. CASC installs Bradford White tanks across Central Arkansas, sizing the tank to your household, bringing venting and safety parts up to current requirements, pulling required permits and registering the equipment. We also service all major water heater brands.
- [Fixes for the problem rooms in your home](https://centralarservice.com/learning-center/comfort-and-plumbing-by-space): Most comfort and plumbing complaints come from specific spaces: a hot upstairs or bonus room, an addition or garage the ductwork doesn't reach, a house that feels muggy, or a slab floor hiding a leak. Each has its own causes and fixes, from airflow corrections and ductless systems to whole-home dehumidifiers and slab leak detection.
- [Hot upstairs bedrooms and bonus rooms](https://centralarservice.com/learning-center/hot-upstairs-and-bonus-rooms): Upstairs rooms and bonus rooms run hot because heat rises, roofs bake in summer and the ductwork serving them is often long, leaky or undersized. The fix is usually airflow: duct modifications, sealing and better returns. When ducts can't deliver enough, a ductless mini-split dedicated to that room is a reliable option.
- [Heating and cooling additions, garages and sunrooms](https://centralarservice.com/learning-center/additions-garages-and-sunrooms): The cleanest way to heat and cool a garage, sunroom, workshop or addition is usually a ductless mini-split. It works on its own, so you don't overload your existing system or run new ducts. CASC installs Mitsubishi ductless systems sized to the space, with an outdoor unit and one or more indoor heads.
- [Sticky air, humid homes and crawlspaces](https://centralarservice.com/learning-center/humid-homes-and-crawlspaces): A house feels muggy when the air conditioner cools without removing enough moisture. Common causes are an oversized or short-cycling AC, leaky ducts pulling damp air from a crawlspace or attic, and long humid Arkansas summers. Fixes include correcting the AC and ducts, and a whole-home dehumidifier, which CASC installs.
- [Slab-foundation homes: spotting and fixing slab leaks](https://centralarservice.com/learning-center/slab-foundation-homes): A slab leak is a leak in a water line under or inside a home's concrete foundation. Warning signs include warm spots on the floor, a rising water bill, running-water sounds with every tap off and damp flooring. CASC uses leak detection to pinpoint the leak, then explains repair options before any concrete is opened.
- [Commercial HVAC and plumbing by building type](https://centralarservice.com/learning-center/commercial-by-building-type): Different buildings stress HVAC and plumbing in different ways. Restaurants push drains, grease traps and rooftop units hard; offices and shops need steady comfort and working restrooms during business hours. CASC serves business owners, property managers, landlords and facility managers with commercial HVAC and commercial plumbing service across Central Arkansas.
- [HVAC and plumbing for restaurants](https://centralarservice.com/learning-center/restaurants-and-food-service): Restaurants work their plumbing and HVAC harder than most buildings. Grease, food solids and hot water stress kitchen drains and grease traps, while cooking heat and constant door traffic load the rooftop units. Planned drain care, grease trap service and quarterly HVAC maintenance help prevent the breakdowns that close a dining room.
- [HVAC and plumbing for offices and retail](https://centralarservice.com/learning-center/offices-and-retail): Offices and retail spaces need steady comfort and working restrooms during business hours. Most run rooftop units or split systems, sometimes with mini-splits for server rooms or add-on spaces. Quarterly HVAC maintenance, planned repairs and attention to restrooms, water heaters and backflow devices keep small problems from closing the doors.
- [Symptom guide: what your system is telling you](https://centralarservice.com/learning-center/symptom-guide): Most heating, cooling and plumbing problems announce themselves with a symptom: no heat, no hot water, warm air from the AC, water around the unit or weak water pressure. This guide covers what each usually means, the safe checks you can do yourself, and when it's time to book a CASC repair visit.
- [Heat not working? Furnace and heat pump troubleshooting](https://centralarservice.com/learning-center/heat-not-working): When the heat stops working, start with safe checks: thermostat mode and setpoint, batteries, the breaker and furnace switch, the filter and the furnace door panel. Heat pumps also run normal defrost cycles. If the simple checks don't fix it, or you see an error code, book a CASC heating repair visit.
- [No hot water: what's going on and what to check](https://centralarservice.com/learning-center/no-hot-water): No hot water usually comes down to the heat source: a gas water heater whose pilot or ignition has failed, an electric heater with a tripped breaker or bad element, or a tankless unit showing an error. Not enough hot water often points to sediment, a broken dip tube or a heater too small for the household.
- [Permits and code for HVAC and plumbing work in Central Arkansas](https://centralarservice.com/learning-center/permits-and-code-in-central-arkansas): Many HVAC and plumbing jobs in Central Arkansas cities, like equipment replacement, water heater swaps, gas line work and sewer line work, commonly need a permit and an inspection. Your city building department issues most permits, state agencies license the trades, and a licensed contractor usually pulls the permit for you.
- [Do you need a permit to replace an AC, furnace or heat pump?](https://centralarservice.com/learning-center/permits-hvac-replacement): Replacing an air conditioner, furnace, heat pump or ductless system commonly needs a mechanical permit and inspection in Central Arkansas cities, because the job involves refrigerant, gas, venting and electrical connections. A licensed HVAC contractor usually pulls the permit. Check with your city building department before work begins.
- [Permits for water heaters, gas lines and sewer lines](https://centralarservice.com/learning-center/permits-water-heater-gas-sewer): Replacing a water heater, running or changing a gas line, and repairing or replacing a sewer line commonly need a plumbing or fuel gas permit and an inspection in Central Arkansas cities. A licensed plumber usually pulls the permit. Requirements vary by city, so confirm with your local building department before work starts.

### Compare: Which option fits?

- [Heat pump vs gas furnace in Central Arkansas](https://centralarservice.com/learning-center/heat-pump-vs-gas-furnace): A heat pump uses electricity to move heat and also cools your home. A gas furnace burns natural gas to make heat and pairs with a separate air conditioner. Both can work well in Central Arkansas. The right choice depends on gas service at your home, your ductwork, your utility rates and how you like your home to feel.
- [Tank vs tankless water heater](https://centralarservice.com/learning-center/tank-vs-tankless-water-heater): A tank water heater keeps a set amount of water hot and ready, while a tankless unit heats water only when you open a tap. Tankless gives you a steady supply and saves space; a tank is simpler to install and handles several fixtures at once. Your household's hot water use and your gas and venting setup decide the fit.
- [Ductless mini-split vs extending central air](https://centralarservice.com/learning-center/ductless-mini-split-vs-central-air): For a room your central air does not reach well, like an addition, garage or bonus room, a ductless mini-split is often the cleaner fix. Extending central air can work when your system has spare capacity and ducts can reach the space. The deciding factors are your system's size, your duct layout and how the room is used.
- [Good, Better, Best: how CASC lays out replacement options](https://centralarservice.com/learning-center/good-better-best-hvac-options): When you replace your heating or cooling system, CASC shows you Good, Better and Best options. Each step up changes the equipment, efficiency rating, comfort features and price. Sizing, installation quality, permits and our warranty stay the same. You pick the option that matches your comfort goals, how long you plan to stay and your budget.
- [Drain snaking vs hydro-jetting](https://centralarservice.com/learning-center/drain-snaking-vs-hydro-jetting): Drain snaking uses a spinning cable to punch through a clog and get water moving again. Hydro-jetting uses high-pressure water to scrub grease, sludge and buildup off the inside of the pipe. Snaking handles most simple clogs. Jetting fits repeat clogs, heavy grease and main lines, as long as the pipe is in good enough shape.
- [Is a maintenance plan worth it?](https://centralarservice.com/learning-center/is-a-maintenance-plan-worth-it): For most homes with central air, a heat pump or mini-splits, yes. CASC's Residential HVAC Maintenance Plan is $189 for the first system and $99 for each additional system, plus tax. It includes a spring cooling visit and a fall heating visit, plus 10% off qualifying repairs and service-call fees. It does not auto-renew.
- [How our pricing works](https://centralarservice.com/learning-center/how-casc-pricing-works): Repairs start with a service call: $99 on weekdays and $149 on weekends and holidays, for HVAC and plumbing. That fee is not waived or credited toward the repair. HVAC replacements, larger plumbing projects and commercial HVAC projects get a free estimate instead. There is no travel fee within our normal 50-mile service area.

### Act: What happens next?

- [Get a free replacement estimate](https://centralarservice.com/learning-center/free-replacement-estimate): CASC gives free estimates on HVAC replacements, larger plumbing projects like water-heater installs, repipes and sewer replacements, and commercial HVAC projects. A technician visits, looks at your current equipment and home, sizes the job and walks you through options. Request yours through our contact form or call 501-307-1310.
- [What to expect from a CASC repair visit](https://centralarservice.com/learning-center/schedule-a-repair-visit): To book a repair, send the contact form with your preferred day and time or call 501-307-1310. We confirm the actual appointment with you. Repair visits start with a service call: $99 on weekdays and $149 on weekends and holidays. We're open Monday-Sunday, 7:00 AM-6:00 PM, with same-day service when availability allows.
- [Request a commercial HVAC or plumbing quote](https://centralarservice.com/learning-center/commercial-quote): Businesses can request a commercial HVAC or plumbing quote through our contact form or by calling 501-307-1310. CASC handles rooftop units, split systems and mini-splits, plus commercial plumbing, drains, grease traps and backflow. Commercial HVAC projects get a free estimate, and our quarterly Commercial HVAC Maintenance Program is quoted per building.

## Blog

- [10 Common Causes of Clogged Drains and How to Prevent Them](https://centralarservice.com/blog/10-common-causes-of-clogged-drains-and-prevention)
- [10 Common Plumbing Problems and How to Fix Them](https://centralarservice.com/blog/10-common-plumbing-problems-and-how-to-fix-them)
- [10 Expert Tips to Unclog and Clean Your Bathroom Sink Drain](https://centralarservice.com/blog/10-tips-to-unclog-and-clean-your-bathroom-sink-drain)
- [10 HVAC Tips to Keep Your Home Cool and Energy-Efficient This Summer](https://centralarservice.com/blog/10-hvac-tips-to-keep-your-home-cool-and-energy-efficient-this-summer)
- [5 Signs You Need Plumbing Repairs in Your Arkansas Home](https://centralarservice.com/blog/5-signs-you-need-plumbing-repairs-in-your-arkansas-home)
- [7 Common Commercial Plumbing Issues and How to Prevent Them](https://centralarservice.com/blog/7-common-commercial-plumbing-issues-and-prevention)
- [7 Common Winter Plumbing Problems and How to Fix Them](https://centralarservice.com/blog/7-common-winter-plumbing-problems-you-shouldnt-ignore)
- [7 Energy-Efficient Air Conditioning Tips for Homeowners in Arkansas](https://centralarservice.com/blog/7-energy-efficient-air-conditioning-tips)
- [7 Expert-Approved Tips to Keep Your House Warm During Winter](https://centralarservice.com/blog/7-tips-to-keep-your-house-warm-during-winter)
- [7 Plumbing Maintenance Tips Every Homeowner Should Know](https://centralarservice.com/blog/7-plumbing-maintenance-tips-homeowners)
- [7 Signs You Have a Problem With Your Sewer Line](https://centralarservice.com/blog/7-signs-of-sewer-line-problems)
- [7 Warning Signs of a Pipe Leak You Should Never Ignore](https://centralarservice.com/blog/7-warning-signs-of-a-leaking-pipe)
- [8 Benefits of Hiring Professional Plumbing Services in Arkansas](https://centralarservice.com/blog/8-benefits-of-hiring-professional-plumbing-services)
- [8 Common Causes of Air Conditioners Leaking Water and How to Fix Them](https://centralarservice.com/blog/8-common-causes-of-ac-leaking-water-and-how-to-fix)
- [AC Repair vs Replacement: Which Option Is Right for You?](https://centralarservice.com/blog/ac-repair-vs-replacement)
- [Air Conditioner Maintenance Checklist for Homeowners in Arkansas](https://centralarservice.com/blog/air-conditioner-maintenance-checklist-arkansas)
- [Air Conditioning 101: Everything You Need to Know](https://centralarservice.com/blog/air-conditioning-101-everything-you-need-to-know)
- [Are High-Efficiency HVAC Systems Worth the Cost?](https://centralarservice.com/blog/are-high-efficiency-hvac-systems-worth-it)
- [Are Smart Thermostats Worth It? A Complete Guide](https://centralarservice.com/blog/are-smart-thermostats-worth-it)
- [Benefits of Energy-Efficient HVAC Systems for Homeowners](https://centralarservice.com/blog/benefits-of-energy-efficient-hvac-systems-for-homeowners)
- [Commercial Plumbing 101: A Complete Guide for Business Owners](https://centralarservice.com/blog/commercial-plumbing-101-guide-for-business-owners)
- [Commercial Plumbing Repair vs. Replacement: How to Make the Right Decision](https://centralarservice.com/blog/commercial-plumbing-repair-vs-replacement)
- [Commercial Plumbing vs Residential Plumbing: 11 Key Differences](https://centralarservice.com/blog/commercial-vs-residential-plumbing)
- [Common Signs Your Garbage Disposal Needs Professional Repair](https://centralarservice.com/blog/signs-garbage-disposal-needs-repair)
- [Common Summer Plumbing Issues and How to Prevent Them](https://centralarservice.com/blog/common-summer-plumbing-issues-and-prevention-tips)
- [Dehumidifier vs AC: Which Is Better for Humidity Control?](https://centralarservice.com/blog/dehumidifiers-vs-air-conditioners)
- [DIY Leak Detection vs. Professional Services: Which Is Better?](https://centralarservice.com/blog/diy-vs-professional-leak-detection)
- [DIY Solutions vs. Professional Drain Cleaning: Which Is Right for You?](https://centralarservice.com/blog/professional-drain-cleaning-vs-diy-solutions)
- [Energy-Efficient HVAC & Plumbing Solutions for Lower Utility Bills](https://centralarservice.com/blog/energy-efficient-hvac-plumbing-lower-utility-bills)
- [Energy-Saving Tips for Heating and Cooling Your Home](https://centralarservice.com/blog/energy-saving-tips-heating-cooling-home)
- [Home AC Filter Replacement: Do’s and Don’ts for Better Performance & Efficiency](https://centralarservice.com/blog/home-ac-filter-replacement-guide)
- [How HVAC Systems Impact Your Energy Bills](https://centralarservice.com/blog/how-hvac-systems-impact-energy-bills)
- [How Often Should Air Conditioners Be Serviced?](https://centralarservice.com/blog/how-often-should-air-conditioners-be-serviced)
- [How Professional Leak Detection Services Work](https://centralarservice.com/blog/how-professional-leak-detection-works)
- [How Regular HVAC Maintenance Can Lower Your Energy Bills](https://centralarservice.com/blog/how-regular-hvac-maintenance-saves-energy)
- [How to Choose the Right Air Conditioner Size for Your Home](https://centralarservice.com/blog/how-to-choose-right-ac-size-for-home)
- [How to Choose the Right Air Conditioning System for Your Home](https://centralarservice.com/blog/how-to-choose-the-right-air-conditioning-system-for-your-home)
- [How to Choose the Right Commercial Plumbing Contractor](https://centralarservice.com/blog/how-to-choose-a-commercial-plumbing-contractor)
- [How to Choose the Right HVAC System for Your Home](https://centralarservice.com/blog/how-to-choose-the-right-hvac-system-for-your-home)
- [How to Find and Fix Leaks Before They Cause Expensive Damage](https://centralarservice.com/blog/how-to-detect-and-fix-plumbing-leaks)
- [HVAC Installation & Replacement: Everything Homeowners Need to Know](https://centralarservice.com/blog/hvac-installation-and-replacement-guide)
- [Leak Detection & Pipe Repair: A Homeowner’s Complete Guide](https://centralarservice.com/blog/leak-detection-pipe-repair-guide)
- [Optimal Winter Thermostat Settings for Energy Efficiency ](https://centralarservice.com/blog/optimal-winter-thermostat-settings-for-energy-efficiency)
- [Plumbing Upgrades That Help Reduce Water Bills](https://centralarservice.com/blog/plumbing-upgrades-reduce-water-bills)
- [Preventive Plumbing Maintenance Checklist for Commercial Properties](https://centralarservice.com/blog/commercial-plumbing-preventive-maintenance-checklist)
- [Seasonal HVAC Checklist for Arkansas Homeowners](https://centralarservice.com/blog/seasonal-hvac-maintenance-checklist-arkansas)
- [Sewer Line Repair vs. Replacement: How to Choose the Right Solution](https://centralarservice.com/blog/sewer-line-repair-vs-replacement)
- [The Complete Guide to Air Conditioning Systems](https://centralarservice.com/blog/complete-guide-air-conditioning-systems)
- [The Complete Guide to Residential Plumbing Services](https://centralarservice.com/blog/residential-plumbing-guide-for-arkansas-homeowners)
- [The Complete Guide to Sewer Line Maintenance for Homeowners](https://centralarservice.com/blog/sewer-line-maintenance-guide)
- [The Importance of Early Leak Detection in Avoiding Major Repairs](https://centralarservice.com/blog/importance-of-early-leak-detection-to-prevent-major-repairs)
- [The Importance of Seasonal Air Conditioning Maintenance](https://centralarservice.com/blog/importance-of-seasonal-ac-maintenance)
- [The Ultimate HVAC Guide for Arkansas Homeowners](https://centralarservice.com/blog/ultimate-hvac-guide-arkansas-homeowners)
- [Top 10 Most Common HVAC Issues and How to Prevent Them](https://centralarservice.com/blog/most-common-hvac-issues-and-how-to-prevent-them)
- [Top 3 Reasons Why You Should Replace Your Home’s Air Filter](https://centralarservice.com/blog/top-3-reasons-why-you-should-replace-your-homes-air-filter)
- [Understanding AC Filters: How Often Should They Be Changed?](https://centralarservice.com/blog/how-often-to-change-ac-filter)
- [What Causes Low Water Pressure? Easy Fixes for Homeowners](https://centralarservice.com/blog/what-causes-low-water-pressure-in-house)
- [What to Expect During an Air Conditioning Installation in Arkansas](https://centralarservice.com/blog/what-to-expect-during-ac-installation)
- [What to Expect During an HVAC Installation or Replacement](https://centralarservice.com/blog/what-to-expect-during-hvac-installation-replacement)
- [When Should You Replace Your Air Conditioner Instead of Repairing It?](https://centralarservice.com/blog/when-should-you-replace-your-air-conditioner-instead-of-repairing-it)
- [Why HVAC Maintenance Is Important Before the Holidays](https://centralarservice.com/blog/why-hvac-maintenance-matters-before-holidays)
- [Why Is My AC Blowing Warm Air? 7 Common Causes & Fixes](https://centralarservice.com/blog/why-is-my-ac-blowing-warm-air)
- [Why is My Hot Water Heater Leaking? Fixes & Prevention Guide](https://centralarservice.com/blog/why-is-your-hot-water-heater-leaking-prevention-tips-fixes)
- [Why You Should Insulate Your Pipes Before Winter](https://centralarservice.com/blog/insulate-your-pipes-before-winter)

## Learning Center Guides (full text)

### How Central Air Conditioners and Heat Pumps Work

URL: https://centralarservice.com/learning-center/how-central-air-and-heat-pumps-work
Type: Learn guide (Cooling & Heating). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

A central air conditioner moves heat from inside your home to the outdoors using refrigerant, an indoor coil, an outdoor compressor and a blower. A heat pump uses the same parts plus a reversing valve, so it can run the cycle backward in winter and bring heat inside instead.

#### What are the main parts of a central AC or heat pump?

Most homes have a split system: an outdoor unit with the compressor and condenser coil, an indoor air handler or furnace with the evaporator coil and blower, and copper lines connecting them.

The outdoor unit holds the compressor (the pump that moves refrigerant), the condenser coil (the large finned coil that wraps the cabinet) and a fan that pulls air across that coil. The indoor side holds the evaporator coil, which sits on top of a furnace or inside an air handler, and the blower that pushes air through your ductwork.

Two copper pipes, called the line set, carry refrigerant between the two halves. The thermostat on your wall is the brain that tells everything when to start and stop. Your ductwork, supply registers and return grilles finish the loop by delivering conditioned air to each room and pulling it back.

#### How does a central air conditioner actually cool your home?

It does not make cold. Refrigerant absorbs heat from your indoor air at the evaporator coil, then the compressor pumps that heat outside, where the condenser coil releases it.

Warm air from your rooms is pulled through the return and across the cold evaporator coil. The refrigerant inside the coil boils at a low temperature and soaks up heat. The compressor squeezes that warm refrigerant vapor into a hot, high-pressure gas and sends it outside. As the outdoor fan blows air over the condenser coil, the refrigerant gives up its heat and turns back into a liquid, ready for another trip.

Cooling is only half the job in Central Arkansas. As humid air crosses the cold coil, moisture condenses on it like water on a cold glass. That water drips into a pan and drains away through a condensate line. When a system is sized and running correctly, you feel both cooler and drier air.

#### How is a heat pump different from a central AC?

A heat pump is an air conditioner that can run in reverse. A reversing valve flips the refrigerant flow so the outdoor coil gathers heat from outside air and the indoor coil releases it.

Even cool winter air holds heat, and a heat pump moves that heat indoors rather than burning fuel to create it. In summer it cools exactly like a central AC. Because the outdoor coil gets cold in heating mode, frost can build on it, so the system runs short defrost cycles, and you may see steam rising from the outdoor unit. That is normal.

Most heat pumps have auxiliary heat, usually electric heat strips in the air handler, for very cold mornings or during defrost. Central Arkansas winters are usually mild enough that a heat pump carries most of the load, but a system leaning on auxiliary heat all the time is worth having checked because heat strips cost more to run.

#### What goes wrong, and what does it feel like at home?

Most problems show up as warm air, ice, water or noise. Each symptom points to a different part, which is why a technician tests the system instead of guessing.

- Ice on the indoor coil or the larger copper line: often a dirty filter, a weak blower or low refrigerant from a leak.
- Water around the indoor unit, or a system that shuts off on hot afternoons: a clogged condensate drain tripping a safety switch.
- Outdoor unit hums but the fan does not spin: commonly a failed capacitor or motor.
- Heat pump blowing cool air in winter: a reversing valve, defrost or thermostat setting issue.
- Short on-off cycles: an oversized system, a thermostat problem or restricted airflow.
- Rooms that stay sticky even when the temperature looks right: airflow, sizing or refrigerant charge problems that keep the coil from pulling out moisture.

#### What can you safely check before you call?

Start with the simple things: thermostat mode and batteries, the air filter, the breakers for both indoor and outdoor units, and clear space around the outdoor unit.

Make sure the thermostat is set to Cool or Heat, not Fan or Off, and that the set point is a few degrees past the room temperature. A clogged filter can shut a system down by freezing the coil, so check it. If a breaker tripped, reset it once. If it trips again, leave it off and call, because repeated tripping points to an electrical fault. Keep grass, leaves and stored items a couple of feet away from the outdoor unit so it can breathe.

Skip anything involving refrigerant, electrical panels inside the equipment or the gas valve. Those are jobs for a licensed technician.

#### How does CASC work on central AC and heat pump systems?

CASC repairs, maintains and replaces central air and heat pump systems across Central Arkansas. We install Rheem HVAC equipment as a Rheem Pro Partner and service major brands.

Our technicians are licensed and certified, and the company is fully insured and bonded. A repair visit starts with a $99 service call on weekdays or $149 on weekends and holidays. We offer same-day service when availability allows, seven days a week from 7:00 AM to 6:00 PM.

If you would rather stay ahead of breakdowns, our Residential HVAC Maintenance Plan includes two visits a year: a spring cooling tune-up and a fall heating tune-up. When a system reaches the end of its life, a replacement estimate is free.

#### What should you read next?

If you are weighing a new system, compare heat pumps with gas furnaces next. If something is not working now, see what happens when you book a repair visit.

#### Frequently asked questions

Q: Is a heat pump the same thing as an air conditioner?
A: In cooling mode, yes. A heat pump has the same basic parts as a central AC, plus a reversing valve that lets it move heat into your home in winter. A standard central AC only cools and is usually paired with a furnace for heat.

Q: Why is there water dripping near my indoor unit?
A: Your AC pulls moisture out of the air, and that water drains through a condensate line. If the line clogs, water backs up into the pan and can overflow or trip a safety switch that shuts the system off. A technician can clear the line and check the pan and switch.

Q: Why does my heat pump outdoor unit steam in winter?
A: That is usually a normal defrost cycle. The system briefly reverses to melt frost off the outdoor coil, and the melting frost can look like steam. If the unit is covered in thick ice that never clears, have it checked.

Q: Does CASC work on brands other than Rheem?
A: Yes. CASC installs Rheem HVAC equipment and services major brands, so you can call us for repairs or maintenance on the system you already have.

### SEER2, HSPF2 and AFUE: What HVAC Efficiency Ratings Mean

URL: https://centralarservice.com/learning-center/efficiency-ratings-seer2-hspf2-afue
Type: Learn guide (Cooling & Heating). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

SEER2 rates how efficiently an air conditioner or heat pump cools over a season. HSPF2 rates how efficiently a heat pump heats. AFUE rates how much of a gas furnace's fuel becomes heat in your home. Higher numbers use less energy, but only when the system is sized and installed correctly.

#### What do SEER2, HSPF2 and AFUE measure?

Each rating answers one question: how much heating or cooling you get for the energy you pay for. SEER2 covers cooling, HSPF2 covers heat pump heating, and AFUE covers gas furnaces.

SEER2 stands for Seasonal Energy Efficiency Ratio 2. It compares the cooling a system delivers over a typical season to the electricity it uses. A higher SEER2 means less electricity for the same comfort.

HSPF2 stands for Heating Seasonal Performance Factor 2. It does the same job for a heat pump in heating mode. AFUE, or Annual Fuel Utilization Efficiency, is a percentage. A furnace rated at 95 percent AFUE turns about 95 cents of every gas dollar into heat for your home, and the rest leaves through the vent.

#### Why do the ratings have a 2 on the end?

SEER2 and HSPF2 come from a newer federal test procedure that better reflects real duct systems. The numbers run lower than old SEER and HSPF numbers for the same equipment.

The older SEER test assumed very little resistance in the ductwork. The updated test adds more realistic airflow resistance, so a system that once carried a certain SEER label now carries a somewhat lower SEER2 number. The equipment did not get worse; the measuring stick changed.

That matters when you compare an old system's label to a new quote. Compare SEER2 to SEER2 and HSPF2 to HSPF2. Mixing old and new ratings makes the efficiency jump look smaller or larger than it really is.

#### How much do efficiency ratings matter in Central Arkansas?

Our long, humid cooling season makes SEER2 the rating that affects most homeowners' bills. Heating ratings still matter, but winters here are shorter and usually milder.

Because your AC or heat pump runs for many months, a higher SEER2 has more hours to pay you back. Higher-efficiency systems often use two-stage or variable-speed compressors and blowers. Those run longer at lower speeds, which also gives the indoor coil more time to pull moisture out of the air. In a humid climate, that can be the difference between cool and clammy.

For heat pumps, HSPF2 tells you how efficiently the system heats before auxiliary heat kicks in. For gas furnaces, a higher AFUE saves fuel, though the payback depends on how much heating your home actually uses.

#### When does a high rating fail to deliver?

A rating is earned in a lab with matched equipment and proper airflow. Poor sizing, leaky ducts or a mismatched indoor coil can erase much of the savings you paid for.

- Oversized equipment short cycles, wastes energy on startups and leaves humidity behind.
- Leaky or undersized ductwork loses conditioned air to the attic or crawlspace and raises static pressure.
- A new outdoor unit paired with an old or mismatched indoor coil may not reach its published rating.
- An incorrect refrigerant charge lowers efficiency and can shorten compressor life.
- Dirty filters and coils cut airflow, which cuts efficiency on any system.

#### How do you compare efficiency ratings on a replacement quote?

Ask for the rating of the complete matched system, not just the outdoor unit, and compare options side by side using the same rating type.

- Confirm the SEER2 (and HSPF2 for a heat pump) is for the matched indoor and outdoor combination being installed.
- Ask whether the compressor and blower are single-stage, two-stage or variable-speed, since that affects comfort and humidity control.
- Ask what will be done about duct leaks or airflow problems, because those affect real-world efficiency.
- Consider how long you plan to stay in the home when weighing a higher tier.
- Ask about current manufacturer rebates and available offers, since some apply only to certain efficiency levels.

#### How does CASC help you choose an efficiency level?

Every CASC replacement estimate is free and lays out Good, Better and Best options, so you can see what each step up in efficiency changes before you decide.

We install Rheem HVAC equipment as a Rheem Pro Partner. New installs carry a 10-year parts and 2-year labor warranty, with optional 5- or 10-year extended labor coverage. Financing options are available, and we will tell you about current manufacturer rebates and available offers during your estimate.

#### Frequently asked questions

Q: Is a higher SEER2 always worth the extra cost?
A: Not always. A higher SEER2 saves more when your system runs many hours, which is common in Central Arkansas, and when the ducts and sizing are right. Comparing Good, Better and Best options side by side helps you see where the extra cost buys comfort or savings you will actually use.

Q: Can I compare my old SEER label to a new SEER2 rating?
A: Not directly. SEER2 uses a tougher test, so the same equipment earns a lower SEER2 number than its old SEER label. Compare SEER2 to SEER2 when you look at new options.

Q: What does AFUE mean on a gas furnace?
A: AFUE is the percentage of the gas a furnace burns that becomes heat in your home over a year. A higher percentage means less fuel goes out the vent.

### The Refrigerant Change: What R-410A to R-454B Means for You

URL: https://centralarservice.com/learning-center/refrigerant-transition-r410a-r454b
Type: Learn guide (Cooling & Heating). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

Federal EPA rules are phasing down high-impact HFC refrigerants like R-410A, so new home AC and heat pump systems now use lower-impact refrigerants such as R-454B. Your working R-410A system does not need to be replaced, and it can still be serviced, but the two refrigerants cannot be mixed.

#### Why are new AC systems using a different refrigerant?

The EPA is phasing down HFC refrigerants with a high global warming potential. R-410A is one of them, so manufacturers have moved new residential systems to lower-impact refrigerants like R-454B.

Refrigerant is the fluid that carries heat in and out of your home. R-410A replaced the older R-22 years ago and became the standard in home air conditioners and heat pumps. Under the federal AIM Act, the EPA set rules that limit high global warming potential refrigerants in newly manufactured equipment and step down how much HFC refrigerant is produced over time.

Manufacturers responded by redesigning their equipment around new refrigerants. R-454B is one of the most common choices for new residential systems. You may also see R-32 on some brands. The outdoor unit, indoor coil and controls are designed together for the refrigerant they use.

#### What is R-454B, and what does A2L mean?

R-454B is a lower global warming potential refrigerant classified as A2L, meaning lower toxicity and mildly flammable. Equipment built for it includes safety features, and installers follow updated rules.

The A2L label comes from a safety classification system. The A means lower toxicity. The 2L means the refrigerant can burn under certain conditions but is much harder to ignite than a flammable gas like propane. Because of that, systems designed for A2L refrigerants often include refrigerant leak sensors and controls that respond if a leak is detected.

For homeowners, the practical change is behind the scenes. Installation practices, tools and code requirements have been updated for A2L systems, which is one more reason this work belongs with licensed technicians.

#### What does the change mean for your current R-410A system?

If your R-410A system works, keep using it. It can still be repaired and recharged, but R-454B cannot be added to it, and R-410A supply is being stepped down over time.

The rules focus on new equipment, not on systems already installed in homes. Technicians can still service R-410A systems with R-410A. What you cannot do is top off an R-410A system with R-454B or mix the two. They run at different pressures and use different oils and components.

As production of R-410A is reduced over time, availability and price may change. That makes a repeated refrigerant leak a bigger decision than it used to be. If your system keeps losing refrigerant, it is worth comparing the cost of finding and fixing the leak against the cost of replacement.

#### What goes wrong during the refrigerant transition?

Most problems come from shortcuts: recharging a leaking system again and again, mixing old and new components, or letting someone without proper certification handle refrigerant.

- Topping off refrigerant without finding the leak, so the system loses charge again and the compressor runs under stress.
- Pairing a new outdoor unit with an old indoor coil that was not designed for the new refrigerant.
- Reusing an old line set without checking its size and condition.
- Releasing refrigerant into the air instead of recovering it, which federal rules prohibit.
- Buying a replacement based on refrigerant fears instead of the actual condition of your system.

#### Do permits and codes change with A2L refrigerants?

Building and mechanical codes have been updated for A2L refrigerants, but each city adopts codes on its own schedule. Confirm current requirements with your local building department.

Federal EPA rules also require technicians who work with refrigerant to be certified under the EPA's Section 608 program and to recover refrigerant properly. Permit requirements for replacing a system are set locally. CASC pulls required permits on the work we do, and our permits guide explains how the process generally works in Central Arkansas.

#### How does CASC handle refrigerant repairs and replacements?

We diagnose the system you have first. If a repair makes sense, we repair it. If replacement is worth considering, the estimate is free and includes Good, Better and Best options.

CASC technicians are licensed and certified, and we install Rheem HVAC equipment as a Rheem Pro Partner. A repair visit starts with a $99 service call on weekdays or $149 on weekends and holidays. New installs carry a 10-year parts and 2-year labor warranty, with optional 5- or 10-year extended labor.

#### Frequently asked questions

Q: Do I have to replace my R-410A air conditioner?
A: No. The EPA rules apply to new equipment. A working R-410A system can stay in service and can still be repaired and recharged with R-410A.

Q: Can a technician add R-454B to my old system?
A: No. R-454B and R-410A are not interchangeable. Your system must be serviced with the refrigerant it was designed for.

Q: Is R-454B safe to have in my home?
A: R-454B is classified as lower toxicity and mildly flammable. Equipment built for it includes safety features, and installers follow manufacturer instructions and updated codes. Confirm local code requirements with your building department.

Q: Will R-410A repairs cost more in the future?
A: They may. Production of R-410A is being reduced over time, which can affect availability and price. Ask your technician to help you weigh a repeated leak repair against replacement.

Note: This guide is a general overview, not legal or code advice. Refrigerant rules and local code adoption change over time. Confirm current requirements with the EPA and your local building department.

### Manual J Load Calculations: How HVAC Systems Get Sized

URL: https://centralarservice.com/learning-center/manual-j-load-calculation
Type: Learn guide (Cooling & Heating). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

A Manual J load calculation is an industry method for figuring out how much heating and cooling your home actually needs, room by room. It looks at insulation, windows, sun exposure, air leakage and local weather. CASC uses Manual J when needed, not on every replacement, because many swaps can be sized from the existing system.

#### What is a Manual J load calculation?

Manual J is a method from the Air Conditioning Contractors of America for calculating how much heat a home gains in summer and loses in winter. The result tells you what size system fits.

The calculation adds up heat gain and heat loss through walls, ceilings, floors, windows and doors. It also accounts for which way windows face, how leaky the house is, how many people live there and the local design temperatures for hot and cold days. The answer comes out in BTUs per hour, which converts to tons of cooling. One ton equals 12,000 BTUs per hour.

A full Manual J is done room by room, which also helps with planning how much air each room should get from the ductwork.

#### Why does right-sizing matter so much in a humid climate?

An oversized AC cools the air fast and shuts off before it removes much moisture, so you get a cold, clammy house. An undersized one runs nonstop on the hottest afternoons.

Moisture removal happens while the system runs steadily and the indoor coil stays cold. A system that is too big reaches the thermostat set point in a few minutes, then shuts off. That pattern, called short cycling, leaves humidity behind, wears parts with constant starts and can make some rooms swing between too cold and too warm.

A system that is too small runs long, which is fine most of the year, but on the hottest Central Arkansas days it may not keep up. The goal is a system that matches the real load of your home.

#### When does an HVAC replacement need a Manual J?

Not every replacement does. A load calculation earns its keep when the house, the system type or the comfort history has changed, or when nobody knows how the old system was sized.

If the house has not changed and the existing system kept it comfortable for years, confirming the current size and condition may be enough.

- You added rooms, finished a bonus room or enclosed a porch.
- You replaced windows, added insulation or sealed the attic, which can lower the load.
- The current system never kept the house comfortable, or it short cycles and leaves the house humid.
- You are switching system types, such as moving from a furnace and AC to a heat pump or ductless.
- You are changing or replacing ductwork at the same time.

#### What goes wrong with rule-of-thumb sizing?

Shortcuts like one ton per so many square feet, or copying the old nameplate, can repeat an old mistake or miss changes made to the house since the last install.

- Square-foot rules ignore insulation, window area, shade and air leakage.
- The old system may have been oversized from the start.
- Bigger is not better: extra capacity often means worse humidity control.
- A right-sized system on undersized or leaky ducts can still feel wrong, because airflow problems and high static pressure limit what the equipment can deliver.

#### What can a load calculation not fix?

Manual J sizes the equipment. It does not fix leaky ducts, crushed duct runs, missing returns or a hot bonus room that never got enough supply air.

If one part of the house is always uncomfortable, the problem may be airflow rather than system size. That is why we look at the ductwork alongside the equipment when comfort complaints are part of the story.

#### How does CASC size a new system?

During your free replacement estimate, we look at the existing system, the house and your comfort history. We run a Manual J when needed, not on every replacement.

From there, we lay out Good, Better and Best options. We install Rheem HVAC equipment as a Rheem Pro Partner, and new installs carry a 10-year parts and 2-year labor warranty with optional 5- or 10-year extended labor. Financing options are available.

#### Frequently asked questions

Q: Is a bigger AC better for hot Arkansas summers?
A: Usually not. An oversized AC short cycles and removes less moisture, which can leave your home cold and clammy. A system matched to your home's actual load tends to feel more comfortable.

Q: Does every HVAC replacement need a Manual J?
A: No. CASC runs a Manual J when needed, such as after additions, insulation or window upgrades, a change in system type, or long-running comfort problems. Many straight swaps can be sized from the existing system.

Q: What is the difference between BTUs and tons?
A: BTUs measure heat. HVAC capacity is usually listed in BTUs per hour or in tons. One ton of cooling equals 12,000 BTUs per hour.

### How Ductwork and Airflow Affect Comfort, Dust and Bills

URL: https://centralarservice.com/learning-center/ductwork-and-airflow
Type: Learn guide (Ductwork & Airflow). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

Yes, your ducts can be the reason some rooms stay hot, the house gets dusty or bills climb. Leaky ducts lose cooled air into attics and crawlspaces, undersized or crushed runs starve rooms of air, and missing returns choke the system. Sealing, airflow corrections or duct changes often fix it.

#### What does your ductwork actually do?

Ductwork is the delivery system. Supply ducts carry conditioned air from the air handler to each room, and return ducts bring air back to be cooled, heated and filtered again.

Air leaves the air handler or furnace into a large box called the supply plenum, then branches into duct runs that end at the supply registers in each room. Return grilles pull air back to the system through the filter. The system works well when the supply and return sides are balanced, sealed and sized for the equipment.

Many Central Arkansas homes have ducts in a hot attic or a damp crawlspace. That makes duct condition especially important, because anything that leaks out or gets pulled in comes from the harshest part of the house.

#### How can ducts cause hot rooms, dust and high bills?

Leaks, poor sizing and damaged runs all reduce the air that reaches your rooms. Leaks on the return side can also pull hot, humid, dusty air from the attic or crawlspace into the system.

- Supply leaks dump cooled air into the attic, so rooms at the end of long runs never get enough.
- Return leaks pull in attic or crawlspace air, adding heat, humidity and dust the system must deal with.
- Crushed, kinked or disconnected flex duct can cut airflow to a room almost completely.
- Too few or too small returns starve the system of air, which raises static pressure and noise.
- Bonus rooms and additions are often tacked onto the end of an existing duct system that was never designed for them.

#### What are the warning signs of a duct problem?

Look for rooms that run several degrees off from the rest of the house, weak airflow at some registers, extra dust, whistling grilles and bills that rise without a change in habits.

- One room or one floor is always hotter or colder than the thermostat setting.
- Some registers blow hard while others barely move air.
- Dust returns quickly after cleaning, or you see dirty streaks around registers.
- Whistling, rattling or a loud rush of air when the system starts.
- The house feels humid even though the AC runs a lot.
- Ducts in the attic or crawlspace are visibly sagging, torn or disconnected.

#### What is static pressure, and why do technicians measure it?

Static pressure is the resistance air meets as it moves through filters, coils and ducts. Think of it like blood pressure for your HVAC system: too high means the blower is straining.

A technician measures static pressure with a gauge at points before and after the blower. High readings can come from undersized ducts, too few returns, a dirty coil or a filter that is too restrictive for the system. A very high MERV filter can sometimes do more harm than good if the duct system was not designed for it.

High static pressure reduces airflow, makes the system louder, lowers efficiency and puts extra wear on the blower motor. It is one of the clearest ways to tell whether a comfort problem lives in the ducts or the equipment.

#### What are the fixes, from small to large?

Most duct problems are solved with the smallest fix that works: sealing leaks, correcting airflow, modifying runs or returns, and replacing ductwork only when it is beyond repair.

- Duct sealing: closing leaks at joints, boots and the plenum so air goes where it should.
- Airflow corrections: repairing crushed or disconnected runs and balancing airflow between rooms.
- Modifications: adding a return, resizing a run or rerouting ducts to a problem room.
- Duct replacement: new ductwork when the existing system is damaged, deteriorated or badly undersized.
- Duct cleaning: removing built-up dust and debris when ducts are dirty, such as after construction.

#### How does CASC handle ductwork?

CASC handles new ductwork, duct replacement, modifications, airflow corrections, sealing and duct cleaning. We look at the ducts and the equipment together, because comfort depends on both.

A diagnostic visit starts with a $99 service call on weekdays or $149 on weekends and holidays. If you are also replacing your HVAC system, ask us to evaluate the ductwork during your free replacement estimate so both parts of the system are planned together. We also offer dryer vent cleaning.

#### What should you read next?

If one room or addition is the problem, compare ductless with extending your ducts. If you are ready to have someone look, see what a repair visit includes.

#### Frequently asked questions

Q: Can leaky ducts make my house humid?
A: They can. Leaks on the return side pull in air from the attic or crawlspace, which is often hot and humid in Central Arkansas summers. That extra moisture is more than the system was meant to handle.

Q: Should I close vents in rooms I do not use?
A: Usually not. Closing several registers raises static pressure and can reduce airflow across the coil, which may cause freezing or strain the blower. If a room gets too much or too little air, airflow balancing is a better fix.

Q: Is duct cleaning the same as duct sealing?
A: No. Duct cleaning removes dust and debris from inside the ducts. Duct sealing closes the leaks that let air escape or get pulled in. They solve different problems.

### How a Tank Water Heater Works and How to Make It Last

URL: https://centralarservice.com/learning-center/tank-water-heater-basics
Type: Learn guide (Water Heaters). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

A tank water heater stores and heats water in an insulated tank using a gas burner or electric elements. Cold water enters at the bottom through a dip tube, and hot water leaves from the top. Flushing sediment, checking the anode rod and testing the relief valve help it last longer.

#### What is inside a tank water heater?

A steel tank lined with glass, a heat source, a thermostat, a dip tube, an anode rod, a temperature and pressure relief valve and a drain valve. Gas units also have a burner and flue.

- Dip tube: carries incoming cold water to the bottom of the tank.
- Heat source: a gas burner under the tank, or one or two electric elements inside it.
- Thermostat or gas control valve: turns the heat on and off to hold your set temperature.
- Anode rod: a metal rod that corrodes on purpose so the tank does not.
- T&P valve: opens if temperature or pressure inside the tank gets too high.
- Drain valve: near the bottom, used to flush out sediment.
- Expansion tank: on many homes, a small tank on the cold line that absorbs pressure as water heats.

#### How does a tank water heater heat and deliver water?

Cold water enters at the bottom, the burner or elements heat it, and hot water rises to the top where it leaves for your faucets. The tank refills and reheats as you use it.

Hot water is lighter than cold, so the tank naturally layers with the hottest water at the top. When you open a faucet, hot water leaves the top while cold water flows in through the dip tube. On a gas unit, the burner fires and exhaust leaves through a flue in the center of the tank. On an electric unit, the upper and lower elements take turns.

How fast the tank recovers depends on its size and heat source. Gas units usually recover faster than electric units of the same size, which matters on mornings with back-to-back showers.

#### What maintenance helps a tank water heater last?

The big three are flushing sediment, checking the anode rod and testing the T&P valve. Keeping the area around a gas unit clear and watching for small leaks matters too.

- Flush the tank periodically to remove sediment. Many manufacturers suggest about once a year; check your owner's manual.
- Have the anode rod checked. When it is mostly gone, the tank itself starts to corrode.
- Test the T&P valve and make sure its discharge pipe is in place and unobstructed.
- Keep stored items away from a gas water heater and make sure the flue is intact.
- Look for moisture at fittings, the drain valve and the base of the tank.

#### What goes wrong, and what are the warning signs?

Noises, rusty water, leaks and running out of hot water fast are the common signs. Some point to a repairable part; a leaking tank body means replacement.

- Popping or rumbling: sediment on the bottom of the tank boiling under the burner or around the lower element.
- Rusty or discolored hot water: a spent anode rod or corrosion inside the tank.
- Water around the base: could be a fitting or valve, or a failed tank that cannot be repaired.
- T&P valve dripping or discharging: high pressure or temperature, sometimes linked to a missing or failed expansion tank.
- Gas unit with no hot water and a pilot that will not stay lit: often a thermocouple or control issue.
- Electric unit with lukewarm water: often a failed element or thermostat.
- Hot water runs out much faster than it used to: heavy sediment or a broken dip tube.

#### When is repair smart, and when is replacement the better call?

Parts like elements, thermostats, thermocouples, valves and anode rods can usually be replaced. A tank that leaks from the body cannot be patched and needs to be replaced.

Age and condition matter too. If an older tank has rusty water, heavy sediment and a leak at the base, putting money into repairs rarely makes sense. If a newer tank has a failed element or thermostat, a repair is often the right move. Replacement is also a good time to consider whether a tank or tankless water heater fits your household.

#### How does CASC service tank water heaters?

CASC repairs, flushes and replaces tank water heaters. A water heater flush is $159. We install Bradford White tank water heaters and service major brands.

Repair visits start with a $99 service call on weekdays or $149 on weekends and holidays. Estimates for water heater installs are free, and we pull required permits. We offer same-day service when availability allows, seven days a week from 7:00 AM to 6:00 PM.

#### Frequently asked questions

Q: Why does my water heater make popping noises?
A: Usually sediment. Minerals settle on the bottom of the tank, and water trapped under them boils and pops when the burner or element heats. A flush can remove loose sediment.

Q: How much does a water heater flush cost at CASC?
A: A water heater flush is $159.

Q: Can a leaking water heater tank be repaired?
A: If the leak is from a fitting, valve or drain, it can often be repaired. If water is coming from the tank body itself, the tank has failed and needs to be replaced.

Q: What is the pipe on the side of my water heater?
A: That is usually the discharge pipe for the temperature and pressure relief valve. It carries water safely away if the valve opens. It should never be capped or removed.

### How Tankless Water Heaters Work and What Upkeep They Need

URL: https://centralarservice.com/learning-center/how-tankless-water-heaters-work
Type: Learn guide (Water Heaters). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

A tankless water heater heats water only when you open a hot tap. A flow sensor fires a gas burner, and water passes through a heat exchanger on its way to your faucet. Output is limited by flow rate and how much the water must be warmed, so sizing, gas supply and periodic descaling all matter.

#### How does a tankless water heater make hot water on demand?

When you open a hot tap, a flow sensor detects water moving, the burner lights, and water heats as it passes through a heat exchanger. When you close the tap, it shuts off.

There is no tank of stored hot water to keep warm, so a tankless unit does not burn fuel to reheat water while you sleep or work. Its controls adjust the burner up and down to hold the outlet temperature you set, based on how much water is flowing and how cold it is coming in.

Because it heats water as you use it, a properly sized tankless unit does not run out the way a tank does. The tradeoff is that it can only heat so many gallons per minute at once.

#### What limits how much hot water a tankless unit delivers?

Two numbers: flow rate, measured in gallons per minute, and temperature rise, which is how much the unit must warm the incoming water. Colder incoming water means fewer gallons per minute.

A unit sized for one shower and a sink may struggle with two showers and a dishwasher at the same time. Incoming water is colder in winter, so the unit has to work harder then. Sizing starts with how many fixtures your household runs at once.

Tankless units also need a minimum flow to fire. A trickle from a faucet may not be enough to turn the burner on, which can feel like the hot water never arrives.

#### What does a tankless installation involve?

Gas tankless units often need a larger gas supply than a tank, dedicated venting, an electrical outlet for the controls and, for condensing models, a drain for condensate.

- Gas supply: the line must be sized for the unit's full burner demand, which is often more than the old tank needed.
- Venting: tankless units use specific vent materials and routes set by the manufacturer.
- Power: the controls and fan need electricity.
- Condensate: high-efficiency condensing models produce acidic water that needs a drain path.
- Location: wall-mounted units free floor space but need proper clearances.

#### What upkeep does a tankless water heater need?

Scale is the main enemy. Minerals in the water build up inside the heat exchanger over time, so manufacturers call for periodic descaling and cleaning the inlet filter screen.

Descaling circulates a cleaning solution through the heat exchanger to dissolve mineral buildup. How often it is needed depends on your water and how much you use. Your owner's manual lists the manufacturer's schedule. Cleaning the small screen at the cold water inlet and checking the vent for blockages are also part of routine care.

#### What goes wrong with tankless water heaters?

Most complaints trace back to sizing, gas supply, scale or venting. The unit's error codes help a technician narrow down which one.

- Cold water sandwich: a brief burst of cold water between uses as the burner relights.
- Lukewarm water when several fixtures run: the unit is undersized or the incoming water is very cold.
- Error codes and shutdowns under heavy use: often an undersized gas line or ignition issue.
- Reduced output or overheating codes: scale buildup in the heat exchanger.
- Unit will not fire at low flow: flow is below the minimum, or the inlet screen is clogged.
- Venting or combustion air problems that trigger safety shutdowns.

#### How does CASC install tankless water heaters?

CASC is a Rinnai PRO and installs Rinnai tankless water heaters. We also install gas lines, so the gas supply can be planned and sized as part of the same project.

Estimates for water heater installs are free, and we pull required permits. Repair visits on existing units start with a $99 service call on weekdays or $149 on weekends and holidays. Financing options are available.

#### What should you read next?

If you are deciding between a tank and a tankless unit, start with our side-by-side comparison, then see what happens at a free estimate.

#### Frequently asked questions

Q: Will a tankless water heater ever run out of hot water?
A: Not the way a tank does. It heats water as it flows, so it keeps going. But it can only heat so many gallons per minute, so running too many fixtures at once can leave the water lukewarm.

Q: Why do I need a bigger gas line for a tankless unit?
A: A tankless burner fires hard for short periods to heat water instantly. Its peak gas demand is often higher than a tank water heater's, so the gas line has to be sized to supply it.

Q: What is descaling?
A: Descaling is flushing a cleaning solution through the heat exchanger to dissolve mineral buildup. Scale reduces output and can cause error codes, so manufacturers list it as routine care.

### Sewer Lines and Camera Inspections Explained

URL: https://centralarservice.com/learning-center/sewer-lines-and-camera-inspections
Type: Learn guide (Drains & Sewer). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

A sewer camera inspection sends a waterproof camera through your main sewer line so a plumber can see roots, cracks, sags, grease and blockages instead of guessing. You need one when several drains back up or gurgle, clogs keep coming back, or you smell sewage indoors or see soggy spots in the yard.

#### What is your sewer line, and who is responsible for it?

Your main sewer line carries every drain in the house out to the city sewer or septic system. The part on your property is usually the homeowner's responsibility; confirm the boundary with your city or utility.

Inside the house, branch drains from sinks, tubs and toilets join a main building drain. Outside, that drain becomes the sewer lateral that runs under the yard to the public sewer main. A cleanout, usually a capped pipe near the house or in the yard, gives plumbers a way into the line.

Where your responsibility ends and the city's begins varies by city and utility, so check with yours if a problem may be near the street.

#### What does a sewer camera inspection show?

The camera shows the inside of the pipe on a screen as it travels: roots, cracks, separated joints, low spots that hold water, grease buildup, collapsed sections and the pipe material.

A plumber feeds a flexible cable with a waterproof camera through a cleanout or other access point. As it moves down the line, the video shows exactly what is causing a slowdown and roughly how far from the access point it is. Many camera systems include a locating transmitter that lets the plumber mark the spot and depth from above ground.

That matters because the right fix depends on what the camera finds. A grease clog, a root mass and a collapsed pipe can cause the same backup but need very different repairs.

#### When should you get a sewer camera inspection?

Get one when the problem looks bigger than one drain, when clogs keep returning after cleaning, or when you are buying an older home and want to know what is underground.

- Several drains are slow or back up at the same time.
- Water comes up in a tub or floor drain when you flush a toilet or run the washer.
- Gurgling from drains or toilets.
- Sewage smell inside or near the cleanout.
- Soggy, sunken or unusually green patches over the sewer line.
- A main line clog that comes back within months of being cleared.
- After drain cleaning or hydro jetting, to confirm the line is clear and check its condition.

#### What sewer problems are common in Central Arkansas?

Tree roots, shifting clay soils, aging pipe materials and grease are the usual suspects. Each leaves a recognizable pattern on camera.

- Root intrusion: roots find small gaps at pipe joints and grow into the line, catching paper and waste.
- Shifting soils: clay soil swells when wet and shrinks when dry, which can crack pipes or pull joints apart.
- Bellies: a section of pipe that has settled and sags, holding water and debris.
- Older pipe materials: older homes may have clay or cast iron lines that crack or corrode with age.
- Grease and wipes: grease hardens on pipe walls, and so-called flushable wipes do not break down like toilet paper.

#### What happens after the inspection?

The video points to the fix: cleaning for blockages, a section repair for a localized break, or a sewer line replacement when the pipe is failing along its length.

Blockages from grease or roots are usually cleared with drain cleaning or hydro jetting, depending on what the camera shows. A single cracked or separated section can often be repaired by excavating just that spot. When the line has multiple failures, a full sewer line replacement, with excavation when necessary, may be the more lasting answer.

#### How does CASC handle sewer line problems?

CASC offers sewer camera inspections, drain cleaning, hydro jetting and sewer line repair and replacement, with excavation when necessary. We show you what the camera finds before recommending a fix.

A visit starts with a $99 service call on weekdays or $149 on weekends and holidays. Estimates for sewer replacements are free, and we pull required permits. If the problem may involve an insurance claim, we provide photos, written findings and documentation, though we never promise what a policy will cover.

#### Frequently asked questions

Q: Does a camera inspection fix the clog?
A: No. The camera shows what is causing the problem. Clearing it takes drain cleaning, hydro jetting or a repair, depending on what the video shows.

Q: Why do my drains gurgle when the washer drains?
A: Gurgling often means water is struggling to get past a partial blockage in the main line, or that venting is restricted. If several fixtures gurgle or back up, a main line problem is likely and a camera inspection can confirm it.

Q: Do I need a camera inspection before buying an older home?
A: It is a smart step. A standard home inspection usually does not look inside the sewer line, and older lines can hide roots, cracks or sags that are costly to fix later.

Q: Does CASC dig up the yard to fix a sewer line?
A: When a repair or replacement requires it, yes. CASC repairs and replaces sewer lines with excavation when necessary, and the camera helps target the dig to the problem area.

### Backflow Preventers and Testing: What They Are and Why They Matter

URL: https://centralarservice.com/learning-center/backflow-prevention-and-testing
Type: Learn guide (Plumbing). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

A backflow preventer is a valve assembly that keeps water from flowing backward out of your plumbing and into the drinking water supply. Water providers and local authorities often require testable assemblies on irrigation, fire sprinkler and commercial lines, and those assemblies need periodic testing because their internal parts wear over time.

#### What is backflow, and what does a backflow preventer do?

Backflow is water reversing direction in a pipe. A backflow preventer is a set of check valves that lets water flow one way only, so nothing from your system can be pulled back into the public supply.

Backflow happens two ways. Backsiphonage occurs when pressure in the supply drops, such as during a water main break or heavy firefighting, and water gets sucked backward. Backpressure occurs when pressure on your side, from a pump or a pressurized system, pushes water back toward the main.

The risk comes from cross-connections: any point where drinking water piping connects to something that could contaminate it. Lawn irrigation, fire sprinkler systems, commercial kitchen and beverage equipment and even a garden hose left in a bucket are common examples.

#### What types of backflow preventers are there?

The type depends on the hazard. Higher-risk connections call for a reduced pressure zone assembly, while lower-risk ones may use a double check valve assembly or a vacuum breaker.

A pressure reducing valve (PRV) is a different device. It lowers incoming water pressure to protect your plumbing, but it does not stop backflow.

- Reduced pressure zone (RPZ) assembly: two check valves with a relief valve between them that dumps water if either check leaks. Used on higher-hazard connections.
- Double check valve assembly: two independent check valves in series. Used on many lower-hazard connections, such as some fire sprinkler lines.
- Pressure vacuum breaker: common on lawn irrigation systems to stop backsiphonage.
- Hose bibb vacuum breaker: a small device on an outdoor faucet that keeps hose water from being siphoned back.

#### Why does your water provider ask for a backflow test?

Testable assemblies rely on springs, rubber seals and check valves that wear out or get fouled. Many water providers and local authorities require periodic testing by a qualified tester to prove the assembly still works.

During a test, the tester uses a gauge kit connected to the assembly's test cocks to check that each check valve holds and that an RPZ relief valve opens when it should. The results go on a test report that is submitted to whoever requires it. Testing schedules and reporting rules are set locally, so follow the notice from your water provider and confirm requirements with your local building department.

#### What goes wrong with backflow assemblies?

Debris, worn seals, freezing and age are the usual causes. A failed test does not always mean replacement; many assemblies can be repaired with a parts kit.

- Debris lodged in a check valve so it cannot close fully.
- Worn rubber seals or weak springs that let water pass backward.
- An RPZ relief valve that drips or dumps water, often a sign that a check valve is leaking.
- Freeze damage to above-ground assemblies during Central Arkansas cold snaps.
- Shutoff valves on the assembly that no longer seal, which makes testing and repair harder.

#### Do you need a permit to install or replace a backflow preventer?

Often, yes. Installing or replacing an assembly is plumbing work that local authorities may regulate. Requirements vary, so confirm with your local building department and water provider.

CASC pulls required permits on the work we do. Our permits guide explains in general terms how permits and inspections work across Central Arkansas cities.

#### How does CASC handle backflow preventers?

CASC installs, repairs and tests backflow preventers for homes and businesses across Central Arkansas, from irrigation connections to commercial plumbing systems.

Residential visits start with a $99 service call on weekdays or $149 on weekends and holidays. Our technicians are licensed and certified, and the company is fully insured and bonded. Businesses with backflow, grease trap or other commercial plumbing needs can request a quote.

#### Frequently asked questions

Q: Why did I get a letter asking for a backflow test?
A: Many water providers keep records of testable backflow assemblies and require periodic testing to confirm they still protect the public water supply. Follow the instructions and deadline in the notice, and call a qualified tester.

Q: My RPZ is dripping water. Is that a problem?
A: Often, yes. The relief valve discharges when a check valve is not sealing or pressure fluctuates. It should be inspected and repaired so the assembly works as designed.

Q: Is a pressure reducing valve the same as a backflow preventer?
A: No. A pressure reducing valve lowers incoming water pressure to protect your plumbing. A backflow preventer stops water from flowing backward into the supply.

Note: This guide is a general overview, not code or legal advice. Backflow testing and permit requirements are set locally. Confirm current requirements with your water provider and local building department.

### Indoor Air Quality Options: Match the Fix to the Problem

URL: https://centralarservice.com/learning-center/indoor-air-quality-options
Type: Learn guide (Indoor Air Quality). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

Start with the problem you want to solve. A whole-home dehumidifier handles muggy, musty air. Better filtration or an air cleaner targets dust. A UV light helps keep the indoor coil cleaner. Fresh-air ventilation brings outdoor air into a stuffy, tightly sealed home. Many homes need only one of these, not all four.

#### What do indoor air quality upgrades actually do?

Each one solves a different problem. Dehumidifiers remove moisture, filters and air cleaners capture particles, UV lights treat the indoor coil, and ventilation swaps stale indoor air for fresh outdoor air.

Whole-home IAQ equipment works with your existing HVAC system rather than as separate units in each room. A whole-home dehumidifier ties into the ductwork. Filtration upgrades and air cleaners sit where air returns to the system. UV lights mount near the indoor coil. Fresh-air ventilation brings in measured amounts of outdoor air through the duct system.

Because they work together with your heating and cooling, the right choice depends on how your system, ducts and house behave, not just on the product.

#### Which problem are you trying to solve?

Name the symptom first. The most common Central Arkansas complaints are muggy or musty air, dust that comes back fast, odors around the system and stuffy rooms in tightly built homes.

- Muggy, clammy or musty air, especially in spring and fall: a whole-home dehumidifier.
- Dust that settles quickly after cleaning: better filtration or an air cleaner, and a check for leaky return ducts.
- Musty odor when the system starts or a dirty indoor coil: a UV light aimed at the coil, plus coil cleaning.
- Stuffy, stale rooms in a newer or tightly sealed house: fresh-air ventilation.

#### Why is humidity such a big deal in Central Arkansas?

Summers here are humid, and your AC only removes moisture while it runs. On mild, damp days it may barely run, so humidity climbs even when the temperature feels fine.

Air conditioners dehumidify as a side effect of cooling. In spring and fall, or in a house with an oversized system, the AC does not run long enough to pull out much water. Crawlspaces and leaky return ducts can add even more moisture. General guidance from the EPA is to keep indoor relative humidity below 60 percent, and a whole-home dehumidifier can control moisture independently of the thermostat.

#### What goes wrong when IAQ upgrades are mismatched?

The wrong product, or the right product on a system with an underlying problem, wastes money. Most IAQ disappointments come from skipping the diagnosis.

- A high MERV filter on a system that cannot handle it, which chokes airflow and raises static pressure.
- An air cleaner installed while leaky return ducts keep pulling in attic dust.
- Fresh-air ventilation that brings in humid outdoor air without a plan to remove the moisture.
- A dehumidifier with a poorly routed drain or undersized for the home.
- UV lamps that are never replaced, so they stop doing their job.
- Expecting a product to cure a health condition. IAQ equipment improves the air; it is not a medical treatment.

#### How do air filters and MERV ratings fit in?

Your HVAC filter is the first line of defense for both your air and your equipment. A higher MERV rating catches smaller particles but also resists airflow more.

MERV ratings run from low, which mainly protects the equipment, to high, which captures fine particles. The right rating is the highest one your system and ductwork can handle without starving the blower. Changing filters on schedule matters as much as the rating. A clogged filter cuts airflow, raises bills and can freeze the indoor coil.

If you want stronger filtration than your current filter slot allows, a dedicated air cleaner or media filter cabinet may be the better route.

#### How does CASC approach indoor air quality?

CASC installs whole-home dehumidifiers, UV lights, air cleaners and filtration, and fresh-air ventilation, and offers duct cleaning. We start with the symptom and recommend only what fits it.

A visit starts with a $99 service call on weekdays or $149 on weekends and holidays. Our technicians check the system and ductwork first, because a duct leak or airflow problem can be the real cause behind dust or humidity. If you are on our Residential HVAC Maintenance Plan, your spring and fall visits are a good time to ask about your air.

#### What should you read next?

See whether a maintenance plan makes sense for your system, or book a visit so a technician can find what is behind the dust, odor or humidity.

#### Frequently asked questions

Q: Do I need a dehumidifier if I already have air conditioning?
A: Sometimes. Your AC removes moisture only while it runs. On mild, humid days, or with an oversized system, it may not run long enough. If your home feels clammy or smells musty, a whole-home dehumidifier can control humidity on its own.

Q: Will a UV light make my family healthier?
A: We do not make health claims. In an HVAC system, a UV light is aimed at the indoor coil to help keep its surface cleaner. Talk to your doctor about health concerns.

Q: What MERV rating should I use?
A: The highest one your system and ductwork can handle without restricting airflow. A technician can check static pressure to see what your system tolerates.

Q: Does the maintenance plan include filters?
A: No. The Residential HVAC Maintenance Plan does not include filters. The Commercial HVAC Maintenance Program does include filters supplied by CASC.

### Heat pump vs gas furnace: which one fits your Central Arkansas home?

URL: https://centralarservice.com/learning-center/heat-pump-vs-gas-furnace
Type: Compare guide (Cooling & Heating). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

A heat pump uses electricity to move heat and also cools your home. A gas furnace burns natural gas to make heat and pairs with a separate air conditioner. Both can work well in Central Arkansas. The right choice depends on gas service at your home, your ductwork, your utility rates and how you like your home to feel.

#### How does a heat pump heat a home?

A heat pump pulls heat out of the outdoor air and moves it inside. In summer it runs the other way and works as your air conditioner.

The outdoor unit and indoor air handler are connected by refrigerant lines. A part called the reversing valve flips the direction the refrigerant flows, so the same system cools in July and heats in January.

Heating efficiency is rated in HSPF2 and cooling efficiency in SEER2. A heat pump does not make heat by burning fuel, so it can deliver more heat than the electricity it uses on mild days.

As the outdoor temperature drops, a heat pump has less heat to collect. On the coldest mornings, auxiliary heat (usually electric heat strips in the air handler) kicks in to help. Aux heat costs more to run, which is why correct sizing matters.

#### How does a gas furnace heat a home?

A gas furnace burns natural gas inside a heat exchanger, then a blower pushes the warm air through your ducts. It handles heating only and pairs with a separate AC.

Furnace efficiency is rated in AFUE, which tells you how much of the gas becomes usable heat in your home. Your air conditioner carries its own SEER2 rating.

A furnace puts out the same heat on a mild day or in a cold snap, and the air at the vents feels noticeably warm. It needs a gas line, a flue or vent to carry combustion gases outside, and regular safety checks of the burners, flame sensor and heat exchanger.

#### What are the pros and cons of each?

A heat pump gives you one system for both seasons and no combustion. A furnace gives steady heat in any weather but needs gas, venting and a separate AC.

- Heat pump pro: one outdoor unit handles heating and cooling.
- Heat pump pro: no gas burning in the home, so no flue to maintain.
- Heat pump con: heat output drops in hard cold and auxiliary heat runs more often.
- Heat pump con: it runs all year, so both spring and fall checkups matter.
- Furnace pro: warm supply air and steady output no matter the outdoor temperature.
- Furnace pro: works well when your home already has gas service and venting.
- Furnace con: needs a gas line, a vent and combustion safety checks.
- Furnace con: you still need a separate air conditioner for summer.

#### Which one fits your home?

If your home has no gas service, a heat pump is usually the simpler path. If you already have gas and like very warm air at the vents, a furnace often makes sense.

Running cost depends on your own electric and gas rates and how efficient the new equipment is, so there is no one answer for every house. Your past utility bills are a good starting point for the conversation.

Also think about what else is due. If your AC and furnace are both near the end of their life, replacing both with a heat pump system is worth comparing against a new furnace plus a new AC. If only the furnace is failing and your AC is newer, keeping gas heat may be the easier fit.

Sizing matters either way. We run a Manual J load calculation when the home calls for it, such as after an addition or when the old system never kept up.

#### How does CASC help you choose?

We give free estimates on HVAC replacements. Your technician looks at your home, ductwork and gas service, then lays out Good, Better and Best options for each path.

CASC installs Rheem heating and cooling equipment and is a Rheem Pro Partner. New HVAC installs carry a 10-year parts and 2-year labor warranty, with labor covered by CASC, and you can add an optional 5- or 10-year extended labor plan.

Financing options available. Ask about current manufacturer rebates and available offers when we meet.

#### Heat pump vs Gas furnace

- How it works: Heat pump: Moves heat from outdoor air with refrigerant; reverses to cool in summer / Gas furnace: Burns natural gas in a heat exchanger; pairs with a separate AC
- Good fit for: Heat pump: All-electric homes or owners who want one system for both seasons / Gas furnace: Homes with gas service and owners who like very warm supply air
- Efficiency rating: Heat pump: SEER2 for cooling, HSPF2 for heating / Gas furnace: AFUE for heating; the AC has its own SEER2
- Cold-weather output: Heat pump: Drops as it gets colder; auxiliary heat backs it up / Gas furnace: Same output no matter the outdoor temperature
- Upfront vs running cost: Heat pump: Replaces both AC and heat source; running cost tracks your electric rate / Gas furnace: Needs gas and venting plus an AC; running cost tracks your gas rate
- Maintenance: Heat pump: Runs year-round, so spring and fall visits both matter / Gas furnace: Fall visit checks burners, flame sensor and venting; AC still needs a spring visit
- Space and install: Heat pump: Outdoor unit plus indoor air handler; no flue / Gas furnace: Indoor furnace with a flue, gas line and an outdoor AC
- What CASC installs: Heat pump: Rheem heat pumps / Gas furnace: Rheem gas furnaces
- Note: Running costs depend on your local electric and gas rates. We do not publish replacement prices because every home is different.

#### Frequently asked questions

Q: Is a heat pump warm enough for a Central Arkansas winter?
A: For most homes, yes. Winters here are generally mild compared with northern states, and auxiliary heat helps on the coldest mornings. A properly sized system and healthy ductwork make the biggest difference in how warm the house feels.

Q: Which one costs less to run?
A: It depends on your electric and gas rates, the efficiency ratings of the equipment and how your home holds heat. Bring a few recent utility bills to your free replacement estimate and we can talk through the tradeoffs for your house.

Q: Can I keep my gas furnace and add a heat pump?
A: Some homes pair a heat pump with a gas furnace so each runs when it makes the most sense. Whether that setup fits your home is a good question to ask during your free replacement estimate.

Q: Do I need new ductwork to switch?
A: Not always. Existing ducts can often be reused if they are the right size and in good shape. We check your ductwork and airflow as part of the estimate and tell you what we find.

### Tank vs tankless water heater: which one is right for your home?

URL: https://centralarservice.com/learning-center/tank-vs-tankless-water-heater
Type: Compare guide (Water Heaters). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

A tank water heater keeps a set amount of water hot and ready, while a tankless unit heats water only when you open a tap. Tankless gives you a steady supply and saves space; a tank is simpler to install and handles several fixtures at once. Your household's hot water use and your gas and venting setup decide the fit.

#### How does a tank water heater work?

A tank water heater stores water and keeps it at temperature around the clock, using a gas burner or electric elements. When the hot water runs out, you wait for it to recover.

Tank capacity and first-hour rating tell you how much hot water you can use in a busy hour. Because the tank stays hot even when nobody is using water, it loses some heat while it sits. That is called standby loss.

Tanks need simple upkeep: a periodic flush to clear sediment, a check of the T&P valve, and an anode rod that protects the tank from corrosion.

#### How does a tankless water heater work?

A tankless water heater fires up when it senses water flowing and heats it as it passes through. There is no stored water, so there is no tank to run dry.

Tankless output is measured by flow rate in gallons per minute. The supply does not run out, but a unit can only heat so many gallons per minute at once, so running two showers and a dishwasher together needs the right size unit.

Gas tankless units often need a larger gas line and different venting than the tank they replace. Hard water can build scale inside the heat exchanger, so tankless units need periodic descaling.

#### What are the pros and cons of each?

Tankless wins on endless supply and space. A tank wins on simpler installs and serving several fixtures at once without upsizing.

- Tank pro: straightforward replacement when swapping like for like.
- Tank pro: stored hot water covers several fixtures at the same moment.
- Tank con: you can run out of hot water during a busy stretch.
- Tank con: standby heat loss while the water sits in the tank.
- Tankless pro: hot water keeps coming as long as you need it.
- Tankless pro: mounts on a wall and frees up floor space.
- Tankless con: may need gas line and venting changes during install.
- Tankless con: needs regular descaling, especially with hard water.

#### Which one fits your household?

If your family runs out of hot water or you want floor space back, tankless is worth a look. If your current tank serves you fine, a like-for-like tank is often the simpler choice.

Think about how many bathrooms you have, how many people shower in the morning, and whether you fill a big tub. Then think about the install: where the unit sits, whether you have gas, and how it vents.

Upfront cost is usually higher for tankless because of the unit and any gas or venting work, while a tank has standby loss over time. We do not publish installation prices because every home is different, but your estimate will show both paths if both make sense.

#### What does CASC install and how do we size it?

CASC installs Bradford White tank water heaters and Rinnai tankless water heaters, and we are a Rinnai PRO. Water-heater installs come with a free estimate.

At the estimate we look at your current unit, your fuel type, venting, gas line and the space, then ask how your household uses hot water. Licensed and certified technicians handle the install and pull required permits.

We also offer a water-heater flush for $159. Financing options available.

#### Tank water heater vs Tankless water heater

- How it works: Tank water heater: Stores water and keeps it hot / Tankless water heater: Heats water on demand as it flows through
- Good fit for: Tank water heater: Homes happy with their current supply; simple like-for-like swaps / Tankless water heater: Homes that run out of hot water or want floor space back
- Hot water supply: Tank water heater: Limited by tank size and first-hour rating / Tankless water heater: Continuous, limited by flow rate (GPM)
- Efficiency: Tank water heater: Some standby heat loss while water sits / Tankless water heater: No standby loss; heats only when used
- Upfront vs running cost: Tank water heater: Usually simpler and lower upfront / Tankless water heater: Usually higher upfront; gas line or venting may change
- Maintenance: Tank water heater: Flush sediment, check anode rod and T&P valve / Tankless water heater: Periodic descaling and inlet filter cleaning
- Space and install: Tank water heater: Floor space for the tank / Tankless water heater: Wall-mounted; needs proper gas supply and venting
- What CASC installs: Tank water heater: Bradford White / Tankless water heater: Rinnai (CASC is a Rinnai PRO)
- Note: We do not publish installation prices. Water-heater installs get a free estimate.

#### Frequently asked questions

Q: Will a tankless water heater never run out of hot water?
A: It will keep heating as long as water flows, but it has a flow-rate limit. If too many fixtures run at once, the water can cool. Sizing the unit to your household avoids that.

Q: Can I switch from a tank to tankless?
A: Often, yes. Gas tankless units may need a larger gas line and new venting, so we check both during your free estimate before recommending it.

Q: How often should each type be maintained?
A: Tanks benefit from periodic flushing to clear sediment, and tankless units need descaling, especially with hard water. Your technician can suggest a schedule based on your water and usage.

Q: Do you service water heaters you did not install?
A: Yes. CASC services major brands, and repair visits start with a service call: $99 on weekdays and $149 on weekends and holidays.

### Ductless mini-split vs extending central air for an addition or bonus room

URL: https://centralarservice.com/learning-center/ductless-mini-split-vs-central-air
Type: Compare guide (Cooling & Heating). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

For a room your central air does not reach well, like an addition, garage or bonus room, a ductless mini-split is often the cleaner fix. Extending central air can work when your system has spare capacity and ducts can reach the space. The deciding factors are your system's size, your duct layout and how the room is used.

#### How does a ductless mini-split work?

A ductless mini-split connects an outdoor unit to one or more wall-mounted indoor heads with a small line set. Each head heats and cools its own space with its own controls.

Because there are no ducts, there are no duct losses in a hot attic. Each indoor head works like its own zone, so you can keep a bonus room cool without overcooling the rest of the house.

Most mini-splits are heat pumps, so they heat as well as cool. The line set runs through a small hole in the wall to the outdoor unit.

#### What does extending central air involve?

Extending central air means running new supply ducts, and ideally a return, from your existing system to the new space. It only works well if the system has capacity to spare.

Your current system was sized for the home as it was. Adding square footage without checking can leave the whole house a little warmer in summer and push static pressure up in the duct system.

A room that is far from the air handler, over a garage, or under a hot roof can still feel uneven even with new ducts. A return air path matters too, or the room can feel stuffy with the door closed.

#### What are the pros and cons of each?

Ductless gives independent control and no duct runs. Extending central air keeps one system and one thermostat, but depends on spare capacity and a workable duct path.

- Ductless pro: the room gets its own temperature control.
- Ductless pro: no new ducts through attics or walls.
- Ductless con: a visible indoor head on the wall.
- Ductless con: each indoor head is one more system to maintain.
- Central extension pro: no extra equipment on the wall.
- Central extension pro: one thermostat for the whole house.
- Central extension con: may overload a system sized for the original home.
- Central extension con: long or awkward duct runs can still leave the room uneven.

#### Which fits your space?

Garages, sunrooms, far-off additions and bonus rooms that run hot usually point to ductless. A small addition close to a system with spare capacity can often be tied into central air.

If you are replacing your whole central system anyway, that is a good time to size the new system for the added space. A Manual J load calculation shows whether the house needs more capacity.

If the room is used only some of the time, like a workshop or guest room, separate control from a ductless head can be a real comfort win.

#### How does CASC handle it?

CASC installs Mitsubishi ductless systems and Rheem central systems, and handles new ductwork, duct modifications and airflow corrections. We look at both paths before recommending one.

A central system replacement comes with a free estimate, and we can talk through a new ductless system when you call. On our Residential HVAC Maintenance Plan, each mini-split indoor head counts as one system, which is worth knowing when you plan ongoing upkeep.

#### Ductless mini-split vs Extending central air

- How it works: Ductless mini-split: Outdoor unit feeds wall-mounted indoor heads through a line set / Extending central air: New ducts carry air from your existing system to the space
- Good fit for: Ductless mini-split: Garages, sunrooms, far additions, hot bonus rooms / Extending central air: Small additions near a system with spare capacity
- Temperature control: Ductless mini-split: Each indoor head has its own controls / Extending central air: Shares the main thermostat
- Efficiency: Ductless mini-split: No duct losses; heats and cools only the room / Extending central air: Duct runs in hot attics can lose energy
- Upfront considerations: Ductless mini-split: New equipment for the space / Extending central air: Duct work plus a check that the system can carry the load
- Maintenance: Ductless mini-split: Clean head filters; each head counts as one system on our plan / Extending central air: Part of your existing system's upkeep
- Space and install: Ductless mini-split: Wall head, small line-set hole, outdoor unit / Extending central air: Attic, wall or floor space for duct runs and a return path
- What CASC installs: Ductless mini-split: Mitsubishi ductless systems / Extending central air: Rheem central systems and new ductwork

#### Frequently asked questions

Q: Can my current AC handle an addition?
A: Sometimes. It depends on how the system was sized and how big the new space is. A load calculation and a look at your ductwork answer that question before any ducts are run.

Q: Does a ductless mini-split heat too?
A: Most do. A typical mini-split is a heat pump, so it heats in winter and cools in summer from the same indoor head.

Q: How does a mini-split count on the maintenance plan?
A: Each indoor head counts as one system on the Residential HVAC Maintenance Plan. The plan is $189 for the first system and $99 for each additional system, plus tax.

### Good, Better, Best: what changes between HVAC replacement options?

URL: https://centralarservice.com/learning-center/good-better-best-hvac-options
Type: Compare guide (Cooling & Heating). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

When you replace your heating or cooling system, CASC shows you Good, Better and Best options. Each step up changes the equipment, efficiency rating, comfort features and price. Sizing, installation quality, permits and our warranty stay the same. You pick the option that matches your comfort goals, how long you plan to stay and your budget.

#### Why do we show three options?

Because no single system is right for every home or every family. Three options let you compare real tradeoffs instead of taking one take-it-or-leave-it quote.

Each option is built for your home, not pulled from a brochure. The difference between them is mostly what the equipment does once it is running: how efficiently it uses energy, how evenly it holds temperature, and how well it handles humidity.

If you are still deciding whether to repair or replace, start with our blog post on that question, then come back here.

#### What changes as you move up?

Efficiency ratings, how the equipment runs, and comfort features usually go up with each step. The upfront price goes up too.

- Efficiency: higher SEER2 (cooling), HSPF2 (heat pump heating) or AFUE (furnace) ratings.
- Operation: single-stage equipment runs full blast or off; two-stage and variable-speed equipment can run at lower speeds for longer, even cycles.
- Comfort: lower-speed operation tends to mean steadier temperatures, quieter running and better moisture removal in a humid Arkansas summer.
- Features: thermostat and control options, plus indoor air quality add-ons such as a whole-home dehumidifier, UV light or air cleaner.

#### What stays the same at every level?

The install. Every option is sized for your home, installed by licensed and certified technicians, permitted where required, and backed by the same warranty.

We run a Manual J load calculation when the home calls for it, such as after an addition, a big change to the house, or when the old system never kept up.

New HVAC installs carry a 10-year parts and 2-year labor warranty, with labor covered by CASC. You can add an optional 5- or 10-year extended labor plan on any option.

CASC installs Rheem equipment and is a Rheem Pro Partner.

#### How do you choose the right level?

Match the option to your plans and your complaints. How long you will stay, how humid the house feels, and whether some rooms run hot all point toward a level.

- Planning to move in a few years? A Good option covers dependable comfort.
- Dealing with sticky air or uneven rooms? Better and Best equipment that runs at lower speeds can help.
- Want the quietest, most even comfort and the highest efficiency? Look at Best.
- Not sure about heat source? Compare a heat pump and a gas furnace first.

#### How do you pay for it?

Financing options available. Synchrony financing covers HVAC and plumbing, and RTO National offers a lease-to-own path for HVAC with no credit needed.

Ask about current manufacturer rebates and available offers when we review your options. We do not publish replacement prices because every home is different, so the estimate is where you see real numbers for each level.

#### What changes between options vs What stays the same

- Equipment: What changes between options: The Rheem model line and its features / What stays the same: Rheem equipment installed by a Rheem Pro Partner
- Efficiency: What changes between options: SEER2, HSPF2 or AFUE ratings rise with each step / What stays the same: Sized for your home, with Manual J when needed
- Operation: What changes between options: Single-stage, two-stage or variable-speed / What stays the same: Your ductwork is checked for fit and airflow
- Comfort: What changes between options: Steadier temperatures, quieter running, better humidity control / What stays the same: Licensed and certified technicians; permits pulled where required
- Features: What changes between options: Thermostat, controls and indoor air quality add-ons / What stays the same: Same free replacement estimate process
- Warranty: What changes between options: Optional 5- or 10-year extended labor / What stays the same: 10-year parts and 2-year labor (labor by CASC)
- Cost: What changes between options: Upfront price rises with each step / What stays the same: Financing options available; ask about current manufacturer rebates and available offers
- Note: Each option is priced for your home at the free estimate. We do not publish replacement prices.

#### Frequently asked questions

Q: Should I always pick Best?
A: Not always. It makes the most sense if you plan to stay a long time, have humidity or uneven-room complaints, or want the highest efficiency. A Good option is a solid, dependable choice for many homes.

Q: Does the warranty change between options?
A: The base install warranty is 10-year parts and 2-year labor, with labor by CASC. You can add an optional 5- or 10-year extended labor plan to any option.

Q: Can I mix and match features?
A: Often, yes. Add-ons like a whole-home dehumidifier or a different thermostat can be discussed on any option. Ask your technician during the estimate.

Q: Do you charge for the replacement estimate?
A: No. Estimates are free for HVAC replacements, larger plumbing projects and commercial HVAC projects.

### Drain snaking vs hydro-jetting: when does a clog need more than a cable?

URL: https://centralarservice.com/learning-center/drain-snaking-vs-hydro-jetting
Type: Compare guide (Drains & Sewer). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

Drain snaking uses a spinning cable to punch through a clog and get water moving again. Hydro-jetting uses high-pressure water to scrub grease, sludge and buildup off the inside of the pipe. Snaking handles most simple clogs. Jetting fits repeat clogs, heavy grease and main lines, as long as the pipe is in good enough shape.

#### How does drain snaking work?

A drain snake is a flexible steel cable with a cutting or grabbing head. It feeds into the drain or a cleanout, spins through the blockage and opens a path for water.

Snaking is quick and works well on hair, soap, wipes and other single-point clogs in sinks, tubs, toilets and branch lines. It opens a hole through the clog, but it does not scrub the pipe walls, so buildup can catch debris again later.

#### How does hydro-jetting work?

Hydro-jetting sends water at high pressure through a special nozzle that scours the full inside of the pipe. It washes grease, sludge, scale and small roots down the line.

Because it cleans the pipe wall instead of just opening a hole, jetting is a strong option for repeat clogs, kitchen lines full of grease, and main sewer lines. It is common in restaurants and other commercial kitchens.

Jetting is not right for every pipe. Old, cracked or collapsed pipe can be damaged further, so the condition of the line matters before choosing it.

#### What are the pros and cons of each?

Snaking is fast and gentle on older pipe but leaves buildup behind. Jetting cleans the whole pipe wall but needs the pipe to be in sound condition.

- Snaking pro: quick fix for most simple clogs.
- Snaking pro: suits older or fragile pipe.
- Snaking con: leaves grease and scale on the pipe walls.
- Hydro-jetting pro: scrubs the pipe clean along its full width.
- Hydro-jetting pro: strong option for grease-heavy and repeat clogs.
- Hydro-jetting con: not suited to cracked, broken or collapsed pipe.

#### Which one does your drain need?

One slow sink or toilet usually calls for snaking. The same line clogging again and again, a greasy kitchen line or a slow main line points toward jetting.

A sewer camera inspection helps settle it. The camera shows whether you are looking at grease, roots, a belly in the line or broken pipe, so the method fits the problem. If the pipe itself is damaged, cleaning is not the fix and a repair conversation comes next.

#### How does CASC handle a clog?

We handle drain cleaning, hydro-jetting and sewer camera inspections for homes and businesses, including commercial kitchens and grease lines.

A drain visit starts with a service call: $99 on weekdays and $149 on weekends and holidays. Your technician finds the cause, explains what they found and the options, then gets your drains moving.

We are open Monday-Sunday, 7:00 AM-6:00 PM, with same-day service when availability allows.

#### Drain snaking vs Hydro-jetting

- How it works: Drain snaking: Spinning steel cable cuts through the clog / Hydro-jetting: High-pressure water scrubs the pipe walls
- Good fit for: Drain snaking: Single clogs in sinks, tubs, toilets and branch lines / Hydro-jetting: Repeat clogs, grease lines and main sewer lines
- What it removes: Drain snaking: Opens a path through the blockage / Hydro-jetting: Grease, sludge, scale and small roots along the pipe
- Pipe condition: Drain snaking: Works on older and fragile pipe / Hydro-jetting: Needs pipe in sound condition
- How long it lasts: Drain snaking: Buildup left behind can catch debris again / Hydro-jetting: Cleaner pipe walls slow new buildup
- Camera inspection: Drain snaking: Helpful when clogs keep coming back / Hydro-jetting: Recommended to check pipe condition first
- What CASC offers: Drain snaking: Drain cleaning for homes and businesses / Hydro-jetting: Hydro-jetting, including commercial kitchen lines

#### Frequently asked questions

Q: Is hydro-jetting safe for my pipes?
A: For pipe in sound condition, yes. For old, cracked or collapsed pipe, it can make things worse, which is why a camera inspection is a good first step on a line with a history of problems.

Q: Why does my drain keep clogging after it is snaked?
A: Snaking opens a path but leaves grease and scale on the pipe walls, and that buildup catches new debris. Repeat clogs are a sign to look inside the line and consider jetting.

Q: Do restaurants need hydro-jetting?
A: Commercial kitchens send a lot of grease down their drains, so jetting is a common way to keep those lines and the path to the grease trap clear.

Q: What does a drain visit cost?
A: Repair visits start with a service call: $99 on weekdays and $149 on weekends and holidays. Your technician explains the work and options after finding the cause.

### Is CASC's Residential HVAC Maintenance Plan worth it for your home?

URL: https://centralarservice.com/learning-center/is-a-maintenance-plan-worth-it
Type: Compare guide (Maintenance). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

For most homes with central air, a heat pump or mini-splits, yes. CASC's Residential HVAC Maintenance Plan is $189 for the first system and $99 for each additional system, plus tax. It includes a spring cooling visit and a fall heating visit, plus 10% off qualifying repairs and service-call fees. It does not auto-renew.

#### What does the plan include?

Two visits a year, one for cooling in spring and one for heating in fall, plus 10% off qualifying repairs (parts and labor) and service-call fees.

- Price: $189 for the first system, $99 for each additional system, plus tax.
- Visits: spring cooling checkup and fall heating checkup.
- Savings: 10% off qualifying repairs, parts and labor, and 10% off service-call fees.
- Mini-splits: each indoor head counts as one system.
- Renewal: the plan does not auto-renew. You choose whether to sign up again.
- Filters: not included, so keep changing yours on schedule.

#### What does it not cover?

The plan is for heating and cooling only. It does not cover plumbing, water heaters or drains, and it does not include filters.

Repairs are not free on the plan. Members get 10% off qualifying repairs and service-call fees. The military, first responder and senior discount cannot be combined with other discounts.

#### Who gets the most from a plan?

Homes that rely on their system year-round, households with more than one system, and anyone who tends to forget checkups get the most value.

Central Arkansas summers are long and humid, and heating season follows quickly. Two scheduled visits a year line up with how hard your system works here.

- Heat pump homes, since the same equipment runs in summer and winter.
- Homes with two systems or several mini-split heads.
- Owners who want a set spring and fall reminder instead of tracking it themselves.
- Anyone who would rather catch a weak part at a checkup than during a heat wave.

#### When might you skip it?

If your system is brand new and you already keep up with checkups on your own, or you plan to replace the system soon, a plan may matter less.

There is no penalty for passing. You can still book a repair any time, starting with a service call: $99 on weekdays and $149 on weekends and holidays.

#### What happens at a maintenance visit?

Your technician checks the parts that matter for the season, cleans what needs it and lets you know about anything wearing out.

A spring visit focuses on cooling: the outdoor condenser, the indoor coil, refrigerant performance, drain lines and airflow. A fall visit focuses on heating: burners and flame sensor on a furnace, or heat mode and auxiliary heat on a heat pump.

If something needs repair, you get the plan's 10% off qualifying parts and labor.

#### What about businesses?

Businesses use our Commercial HVAC Maintenance Program instead: quarterly visits, filters supplied by CASC, priority scheduling and 10% off repairs. Request a quote for your building.

#### With the Residential Plan vs Without a plan

- Cost to join: With the Residential Plan: $189 first system, $99 each additional, plus tax / Without a plan: Nothing up front
- Checkups: With the Residential Plan: Spring cooling and fall heating visits included / Without a plan: You book and pay for visits as you go
- Repairs: With the Residential Plan: 10% off qualifying parts and labor / Without a plan: Standard pricing
- Service-call fees: With the Residential Plan: 10% off / Without a plan: $99 weekday, $149 weekend and holiday
- Renewal: With the Residential Plan: Does not auto-renew / Without a plan: Nothing to renew
- Filters: With the Residential Plan: Not included / Without a plan: Not included
- Mini-splits: With the Residential Plan: Each indoor head counts as one system / Without a plan: Each head still needs cleaning and checks
- What it covers: With the Residential Plan: Heating and cooling only / Without a plan: Not applicable
- Note: The Residential HVAC Maintenance Plan covers HVAC only. Plumbing is not included.

#### Frequently asked questions

Q: Does the plan renew automatically?
A: No. The plan does not auto-renew. You decide each time whether to sign up again.

Q: Are filters included?
A: No. Filters are not included in the residential plan, so keep changing them on your regular schedule.

Q: How are mini-splits counted?
A: Each indoor head counts as one system. A home with a central system and two mini-split heads would have three systems on the plan.

Q: Can I combine the plan discount with the military or senior discount?
A: No. The 10% military, first responder and senior discount is not combinable with other discounts.

Q: Does the plan cover my water heater?
A: No. The plan is for heating and cooling only. Water heaters and other plumbing are handled as separate service visits.

### How CASC pricing works: service calls, free estimates and discounts

URL: https://centralarservice.com/learning-center/how-casc-pricing-works
Type: Compare guide (Pricing). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

Repairs start with a service call: $99 on weekdays and $149 on weekends and holidays, for HVAC and plumbing. That fee is not waived or credited toward the repair. HVAC replacements, larger plumbing projects and commercial HVAC projects get a free estimate instead. There is no travel fee within our normal 50-mile service area.

#### What does a repair visit cost?

A service call is $99 on weekdays and $149 on weekends and holidays. It covers a trained technician coming to your home to find the problem.

The service-call fee is the same for heating, cooling and plumbing. It is not waived and is not credited toward the repair, so you always know what the visit itself costs.

Once the technician finds the cause, they explain what is wrong and the repair options before any work starts.

#### What gets a free estimate?

Free estimates are only for bigger jobs: HVAC replacements, larger plumbing projects like water-heater installs, repipes and sewer replacements, and commercial HVAC projects.

Repairs and diagnostics are not free estimates. If something is broken and needs to be found and fixed, that is a repair visit with a service call.

#### Why don't we publish replacement prices?

Because every home is different. The right system size, ductwork, venting, gas lines, permits and access all change the job, so a posted number would mislead you.

Instead, we look at your home and show you options. For HVAC that means Good, Better and Best choices, sized for your house with a Manual J load calculation when needed.

Financing options available. Ask about current manufacturer rebates and available offers when we meet.

#### Which discounts can you use?

You can use one 10% discount at a time. Which one fits depends on whether you are a plan member or a military, first responder or senior customer.

- Maintenance plan members: 10% off qualifying repairs (parts and labor) and service-call fees.
- Military, first responders and seniors: 10% off HVAC and plumbing repairs and service calls.
- The military, first responder and senior discount does not apply to installs or replacements.
- Discounts are not combinable.

#### Does pricing differ for HVAC and plumbing?

Not for the visit itself. The same $99 weekday and $149 weekend and holiday service call applies to heating, cooling and plumbing repairs.

If a repair visit shows that replacement makes more sense, you can ask for a free replacement estimate from there. The service call for that first visit still applies.

- AC not cooling, furnace not lighting or heat pump stuck on aux heat: repair visit with a service call.
- Water heater leaking or no hot water: repair visit with a service call.
- Slow or backed-up drains: repair visit with a service call.
- Replacing your HVAC system or installing a new water heater: free estimate.
- Sewer line replacement: free estimate.

#### Are there any other fees?

There is no travel fee within our normal 50-mile service area. A few services carry a set price, like a water-heater flush at $159.

Our Residential HVAC Maintenance Plan is $189 for the first system and $99 for each additional system, plus tax. Commercial maintenance is quoted per building.

#### Repairs and diagnostics vs Replacements and larger projects

- How it starts: Repairs and diagnostics: Service call: $99 weekdays, $149 weekends and holidays / Replacements and larger projects: Free estimate
- What qualifies: Repairs and diagnostics: HVAC and plumbing repairs and diagnostics / Replacements and larger projects: HVAC replacements, water-heater installs, repipes, sewer replacements, commercial HVAC projects
- Does the first fee carry over?: Repairs and diagnostics: No. Not waived or credited toward the repair / Replacements and larger projects: No fee for the estimate
- Travel fee: Repairs and diagnostics: None within our normal 50-mile area / Replacements and larger projects: None within our normal 50-mile area
- Plan member discount: Repairs and diagnostics: 10% off qualifying repairs and service-call fees / Replacements and larger projects: Not listed as a plan benefit
- Military, first responder, senior: Repairs and diagnostics: 10% off repairs and service calls / Replacements and larger projects: Does not apply to installs or replacements
- Published prices: Repairs and diagnostics: Service-call fees are published / Replacements and larger projects: No published prices; every home is different

#### Frequently asked questions

Q: Is the service-call fee applied to my repair?
A: No. The $99 weekday or $149 weekend and holiday service call is not waived or credited toward the repair.

Q: Do you charge to come out for an estimate on a new system?
A: No. HVAC replacements, larger plumbing projects and commercial HVAC projects get a free estimate.

Q: Do you charge a travel fee?
A: Not within our normal 50-mile service area around North Little Rock.

Q: Why isn't the service call free?
A: The service call covers a trained technician's trip and time to find the problem. Keeping it a set, published fee means you know the cost of the visit before we arrive.

Q: Can I use more than one discount?
A: No. Discounts are not combinable, and the military, first responder and senior discount does not apply to installs or replacements.

### Get a free HVAC or water-heater replacement estimate

URL: https://centralarservice.com/learning-center/free-replacement-estimate
Type: Act guide (Next Steps). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

CASC gives free estimates on HVAC replacements, larger plumbing projects like water-heater installs, repipes and sewer replacements, and commercial HVAC projects. A technician visits, looks at your current equipment and home, sizes the job and walks you through options. Request yours through our contact form or call 501-307-1310.

#### What qualifies for a free estimate?

Replacements and bigger projects: HVAC replacements, water-heater installs, repipes, sewer replacements and commercial HVAC projects.

If something has stopped working and needs to be diagnosed, that is a repair visit, which starts with a service call: $99 on weekdays and $149 on weekends and holidays. If the technician finds that replacement makes more sense, we can talk about a replacement estimate from there.

#### What happens at an HVAC estimate?

Your technician looks at your current system, your ductwork and your home, asks about comfort problems, then lays out Good, Better and Best options.

Not every replacement needs a full load calculation. We run Manual J when the home calls for it, such as after an addition, when rooms have never been comfortable, or when the old system seemed too big or too small for the house.

The ductwork matters as much as the equipment. A new system on ducts that are too small, leaky or missing a good return path will not deliver the comfort it is rated for, so we tell you what we see and whether duct changes belong in the plan.

Each option lays out the equipment, its efficiency rating, how it runs (single-stage, two-stage or variable-speed) and the comfort features it adds, so you can see what changes from one level to the next.

- Current equipment: age, type, size and condition.
- Ductwork and airflow: whether the existing ducts fit a new system.
- Sizing: a Manual J load calculation when the home calls for it.
- Your goals: hot rooms, humidity, noise, utility bills and how long you plan to stay.
- Options: Rheem equipment at Good, Better and Best levels.

#### What happens at a water-heater estimate?

We check your current water heater, fuel type, venting, gas line and space, then ask how your household uses hot water.

That tells us whether a like-for-like tank, a larger tank or a tankless unit fits your home. CASC installs Bradford White tank water heaters and Rinnai tankless water heaters, and we are a Rinnai PRO.

Switching from a tank to a gas tankless unit can mean a larger gas line and new venting, so we check both before recommending it. The number of bathrooms, how many people shower in the morning and whether you fill a large tub all help size the unit.

Other larger plumbing projects, like repipes and sewer replacements, also get a free estimate. For a sewer line, a sewer camera inspection shows the condition of the pipe, and excavation is used when necessary.

#### What protects a new install?

New HVAC installs carry a 10-year parts and 2-year labor warranty, with labor by CASC, plus an optional 5- or 10-year extended labor plan.

CASC is licensed and certified, fully insured and bonded, and pulls the required permits. Our trusted, professional technicians install Rheem equipment as a Rheem Pro Partner.

#### How can you pay for a replacement?

Financing options available. Synchrony financing covers HVAC and plumbing, and RTO National offers a lease-to-own path for HVAC with no credit needed.

Synchrony financing can be used for HVAC and plumbing projects. RTO National applies to HVAC only. We do not publish rates, payments or terms, so ask about them when you review your options.

Ask about current manufacturer rebates and available offers at your estimate.

#### What happens after the estimate?

You compare the options on your own time. When you pick one, we schedule the install, pull the required permits and install the system.

We present the options and you decide which one, if any, fits your home. Compare the efficiency, comfort features and price of each, and call 501-307-1310 with any questions.

Once you choose, licensed and certified technicians handle the install, and we pull the permits the job requires.

After an HVAC install, our Residential HVAC Maintenance Plan keeps spring and fall checkups on the calendar: $189 for the first system and $99 for each additional system, plus tax.

#### How do you request your estimate?

Use the contact form and pick a preferred day and time, or call 501-307-1310. We're open Monday-Sunday, 7:00 AM-6:00 PM.

Tell us what you are replacing and anything that has been bothering you about the current system. We confirm the actual appointment with you after you send the request.

- Know roughly how old your current system or water heater is.
- Make a list of rooms that run hot, cold or stuffy.
- Have a few recent utility bills handy if you want to talk about efficiency.
- Clear a path to the indoor unit, outdoor unit or water heater.

#### Frequently asked questions

Q: Is the estimate really free?
A: Yes, for HVAC replacements, larger plumbing projects and commercial HVAC projects. Repairs and diagnostics start with a service call instead.

Q: Will you just give me a price over the phone?
A: No. We don't publish replacement prices because every home is different. Sizing, ductwork, venting and permits all change the job, so we price it after we see it.

Q: Do I have to decide at the estimate?
A: No. Take the options home, compare them, and call us when you are ready.

Q: What brands will you quote?
A: Rheem for heating and cooling, Mitsubishi for ductless, Bradford White for tank water heaters and Rinnai for tankless.

### Schedule a repair visit: what to expect from CASC

URL: https://centralarservice.com/learning-center/schedule-a-repair-visit
Type: Act guide (Next Steps). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

To book a repair, send the contact form with your preferred day and time or call 501-307-1310. We confirm the actual appointment with you. Repair visits start with a service call: $99 on weekdays and $149 on weekends and holidays. We're open Monday-Sunday, 7:00 AM-6:00 PM, with same-day service when availability allows.

#### How do you request a visit?

Fill out the contact form or call 501-307-1310. On the form, choose HVAC or plumbing, add your address, describe the problem and pick a preferred day and time.

A preferred time is a request, not a booked slot. We confirm the actual appointment with you. After you send the form you'll see: We'll contact you within 1 hour during regular business hours.

Our phone line is a landline, so please call rather than text.

#### What happens from request to repair?

You send a request, we confirm the appointment, a technician finds the cause and explains your options, and you decide how to proceed.

- Step 1: Send the form or call. Choose HVAC, plumbing or not sure, add your address, describe the problem and pick a preferred day and time.
- Step 2: We confirm the actual appointment with you.
- Step 3: A technician arrives in a branded CASC truck during our Monday-Sunday, 7:00 AM-6:00 PM hours.
- Step 4: The technician diagnoses the problem and explains what they found.
- Step 5: You hear the repair options and decide how to proceed.
- Step 6: Any plan-member or military, first responder and senior discount is applied where it qualifies.

#### What kinds of repairs can you book?

Heating, cooling and plumbing repairs for homes and businesses. CASC services major brands, not only the equipment we install.

- AC, furnace, heat pump and ductless mini-split repair.
- Water heater repair, tank and tankless.
- Drain cleaning, hydro-jetting and sewer camera inspections.
- Leak detection, including hidden, water-line and slab leaks.
- Fixtures, sump and sewage ejector pumps, and gas lines.
- Commercial HVAC and commercial plumbing repairs.

#### When can a technician come out?

We're open Monday-Sunday, 7:00 AM-6:00 PM, and we offer same-day service when availability allows.

Weekend and holiday visits are available during those hours at the weekend and holiday service-call rate.

If you need help today, calling 501-307-1310 is the quickest way to find out what is open. If you use the form, the preferred day and time you pick helps us plan, and we confirm the real appointment with you.

#### What does the visit cost?

The service call is $99 on weekdays and $149 on weekends and holidays, for HVAC and plumbing. It is not waived or credited toward the repair.

- No travel fee within our normal 50-mile service area.
- Maintenance plan members get 10% off qualifying repairs and service-call fees.
- Military, first responders and seniors get 10% off repairs and service calls.
- Discounts are not combinable.

#### What happens when the technician arrives?

A trusted, professional technician arrives in a branded CASC truck, finds the cause of the problem and explains what they found and your repair options.

On a heating or cooling call, that usually means checking the thermostat, power to the equipment, airflow and filters, the outdoor unit and refrigerant performance, and safety controls. On a plumbing call, it means tracing the leak, drain or water-heater problem to its source, using tools like a sewer camera or leak detection when the job calls for it.

If the job is tied to an insurance claim, we can provide photos, written findings and documentation of what we see. Whether a claim is covered is up to your insurer.

If the technician finds that replacement makes more sense than repair, you can ask for a free replacement estimate.

#### What should you have ready?

A short description of what is happening, when it started and anything you have already tried. It helps the technician get to the cause faster.

If your thermostat or water heater shows an error code or a blinking light, write it down or take a photo. Mention whether anything changed recently, like a power outage, a storm or new work in the house, and let us know about gate codes or pets.

- Heating or cooling: what the thermostat says, any noises, and whether the system runs at all.
- Water heater: no hot water, not enough hot water, or a leak.
- Drains: which fixtures are slow and whether more than one drain is backing up.
- Clear access to the equipment, the water heater or the cleanout.

#### Frequently asked questions

Q: How fast will you get back to me?
A: After you send the form: We'll contact you within 1 hour during regular business hours.

Q: Can you come out the same day?
A: Same-day service when availability allows. Calling 501-307-1310 is the quickest way to check.

Q: Is the service call credited toward the repair?
A: No. The service call is not waived or credited toward the repair.

Q: Do you charge extra to come out to my town?
A: No travel fee within our normal 50-mile service area. That covers Little Rock, North Little Rock, Maumelle, Conway, Benton, Bryant and the other cities we serve.

Q: Can I text you to book?
A: No. Our number is a landline, so please call 501-307-1310 or use the contact form.

### Request a commercial HVAC or plumbing quote

URL: https://centralarservice.com/learning-center/commercial-quote
Type: Act guide (Next Steps). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

Businesses can request a commercial HVAC or plumbing quote through our contact form or by calling 501-307-1310. CASC handles rooftop units, split systems and mini-splits, plus commercial plumbing, drains, grease traps and backflow. Commercial HVAC projects get a free estimate, and our quarterly Commercial HVAC Maintenance Program is quoted per building.

#### What commercial work does CASC handle?

Commercial HVAC and commercial plumbing for local businesses, from rooftop units to grease traps.

CASC services major brands, so your equipment does not need to be one we installed. For replacements, we install Rheem heating and cooling equipment as a Rheem Pro Partner, and Mitsubishi ductless systems where a mini-split fits the space.

Our trusted, professional technicians work out of our North Little Rock shop on Counts Massie Road.

- Commercial HVAC: rooftop units (RTUs), split systems and mini-splits; repair and replacement.
- Commercial plumbing: repairs, drain cleaning and hydro-jetting.
- Grease traps and interceptors for kitchens and food service.
- Backflow installation, repair and testing.

#### What is the Commercial HVAC Maintenance Program?

A quarterly maintenance program for business HVAC equipment, with filters supplied by CASC, priority scheduling and 10% off repairs.

There is no published price because every building is different. Tell us how many units you have and what type, and we'll put together a quote. The program covers HVAC only. Plumbing work is quoted or scheduled separately.

Quarterly visits keep rooftop units and split systems checked through each season, and because CASC supplies the filters, filter changes happen on schedule without your staff tracking them.

#### Which buildings do we work in?

Restaurants, offices, retail stores and other commercial buildings across Central Arkansas, within our normal 50-mile service area from North Little Rock.

Restaurants and food service usually need rooftop unit care, kitchen drain cleaning and grease trap service. Offices and retail spaces often lean on rooftop units or split systems, plus restroom plumbing and backflow testing.

We serve Little Rock, North Little Rock, Maumelle, Conway, Benton, Bryant, Cabot, Jacksonville, Sherwood, Mayflower, Ward, Austin, Beebe, Searcy, Lonoke and Greenbrier.

#### What gets a free estimate?

Commercial HVAC projects, such as replacing a rooftop unit or split system, get a free estimate. Repairs start with a diagnostic visit.

For drains that keep backing up, a look inside the line usually comes first so the cleaning method fits the problem.

#### What happens during a commercial visit?

A technician walks the site with your contact person, looks at the equipment or plumbing involved, and records what is there and what condition it is in.

From there you get a quote for the program or project. Commercial HVAC projects get a free estimate. If a repair visit shows a rooftop unit or split system is near the end of its life, you can ask for a replacement estimate from there.

- HVAC: the number and type of units, rooftop access, model details, age and condition, filters and any comfort complaints from staff or customers.
- Plumbing: the drains or fixtures with problems, the grease trap or interceptor, the backflow device and access to cleanouts.
- Scope: whether you need a one-time repair, a replacement project or ongoing quarterly HVAC maintenance.

#### What helps us quote faster?

The building address, the type of business, what equipment you have and what is going on. Equipment model details help too.

Also tell us who our on-site contact is, your business hours, and how we reach the roof or mechanical room. If you manage more than one location, list each address so we can plan the visits together.

Some water providers require periodic backflow testing. If you have received a testing notice, mention it in your request and we can include it.

- Building type: restaurant, office, retail, warehouse or other.
- HVAC: number of units, type (rooftop, split, mini-split) and any known issues.
- Plumbing: drains, grease trap, backflow device or fixture problems.
- Whether you want one-time work, a project or ongoing maintenance.

#### How do you request a quote?

Use the contact form or call 501-307-1310. We're open Monday-Sunday, 7:00 AM-6:00 PM.

On the form, choose HVAC or plumbing, add the building address, describe the work and pick a preferred day and time. We confirm the actual appointment with you.

CASC is licensed and certified, fully insured and bonded, and pulls required permits on the work that needs them.

#### Frequently asked questions

Q: Do you publish commercial maintenance pricing?
A: No. The Commercial HVAC Maintenance Program is quoted per building based on your equipment.

Q: Are filters included in the commercial program?
A: Yes. CASC supplies filters as part of the quarterly Commercial HVAC Maintenance Program.

Q: Does the commercial program cover plumbing?
A: No. It covers HVAC only. Commercial plumbing, drains, grease traps and backflow are handled separately.

Q: Is a commercial HVAC project estimate free?
A: Yes. Commercial HVAC projects, such as replacing a rooftop unit or split system, get a free estimate.

Q: Do you service rooftop units?
A: Yes. CASC services, repairs and replaces commercial rooftop units, split systems and mini-splits.

### The Equipment Brands CASC Installs and Services

URL: https://centralarservice.com/learning-center/brands-we-install
Type: Learn guide (Brands We Install). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

Central Arkansas Service Company installs Rheem heating and cooling systems, Mitsubishi ductless systems, Bradford White tank water heaters and Rinnai tankless water heaters. CASC is a Rheem Pro Partner and a Rinnai PRO. We also service all major brands, so you don't need to own one of these to call us.

#### Which brands does CASC install?

We install four brands: Rheem for central air, heat pumps and furnaces, Mitsubishi for ductless, Bradford White for tank water heaters and Rinnai for tankless water heaters.

Sticking with a short list is on purpose. When our technicians install the same equipment week after week, they know how it goes together, which parts it uses and how it behaves after a few Arkansas summers. That familiarity helps on the install and on later service visits.

Each brand covers a different job in your home, so you aren't choosing between them. A typical house might have a Rheem heat pump, a Bradford White tank in the garage and a Mitsubishi ductless unit in a bonus room.

- Rheem: central air conditioners, heat pumps, gas furnaces and air handlers.
- Mitsubishi: ductless mini-split systems for rooms, additions and whole homes.
- Bradford White: gas and electric tank water heaters.
- Rinnai: gas tankless water heaters.

#### What do Rheem Pro Partner and Rinnai PRO mean?

They are manufacturer contractor programs. CASC holds Rheem Pro Partner status for heating and cooling and Rinnai PRO status for tankless water heaters.

Manufacturer programs connect a contractor with the brand's product training, technical support and registration tools. For you, the practical upside is a contractor who works with that brand regularly and handles the paperwork side of a new install.

We don't claim any other dealer status or certification. For Mitsubishi ductless and Bradford White tank water heaters, we are an installer of the equipment.

#### Do you work on brands you don't install?

Yes. CASC services all major brands of heating, cooling and water heating equipment, so the name on your unit is not a reason to look elsewhere for a repair.

Most homes in Little Rock, North Little Rock and the surrounding area have a mix of equipment from different eras and builders. Our technicians diagnose and repair what you already own before anyone talks about replacement.

If replacement does make sense, we'll show you options from the brands we install and explain why we recommend them for your home.

#### Does the brand matter more than the installer?

Both matter, but installation quality drives how any system performs. Correct sizing, duct condition, refrigerant charge, venting and gas piping all affect comfort and equipment life.

A well-built unit installed on undersized ductwork will still be noisy and uneven. A tankless water heater on a gas line that's too small will still starve at the shower. That's why our replacement visits look at the whole system, not just the box being swapped.

When a load calculation is needed, we run a Manual J. When it isn't, we explain why. Either way, you get tiered replacement options so you can compare equipment side by side.

#### What warranty comes with a new install?

Manufacturer warranty terms vary by model, and CASC registers new HVAC equipment with the manufacturer. New HVAC installs also carry CASC's 10-year parts and 2-year labor warranty.

Optional 5-year or 10-year extended labor coverage is available on new HVAC installs. Ask about current manufacturer rebates and available offers when you request your estimate. Financing options are available.

#### What's the next step if you're comparing brands?

Book a free replacement estimate. A CASC technician looks at your home, explains your options from the brands we install and gives you written pricing.

Free estimates cover HVAC replacements and larger plumbing projects like water heater installs. Call 501-307-1310, Monday through Sunday, 7 AM to 6 PM.

#### Frequently asked questions

Q: Is CASC a Rheem dealer?
A: CASC is a Rheem Pro Partner and installs Rheem central air conditioners, heat pumps and furnaces across Central Arkansas.

Q: Can you repair my unit if it isn't Rheem?
A: Yes. We service all major brands of heating, cooling and water heating equipment.

Q: Which ductless brand do you install?
A: CASC installs Mitsubishi ductless mini-split systems for rooms, additions and homes without ductwork.

Q: Do you register my new HVAC equipment?
A: Yes. We register new HVAC equipment with the manufacturer. Manufacturer warranty terms vary by model, and we'll go over what applies to yours.

### Rheem Heating and Cooling Systems: What to Know

URL: https://centralarservice.com/learning-center/rheem-hvac-systems
Type: Learn guide (Brands We Install). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

Rheem builds central air conditioners, heat pumps, gas furnaces and air handlers in a range of efficiency and comfort levels. CASC is a Rheem Pro Partner and installs Rheem systems across Central Arkansas, with a 10-year parts and 2-year labor install warranty and manufacturer registration on every new system.

#### What does Rheem make for homes?

Rheem makes the main pieces of a central heating and cooling system: outdoor air conditioners and heat pumps, gas furnaces, indoor air handlers and coils, plus thermostats and accessories.

Rheem is a long-established American manufacturer of heating, cooling and water heating equipment. For homes, its HVAC line is sold through contractors and organized into series that step up from simpler single-stage equipment to two-stage and variable-speed models.

The pieces are designed to be matched. An outdoor unit is paired with the right indoor coil or air handler, and that matched system is what the efficiency rating describes.

In a heat pump home, the outdoor heat pump pairs with an indoor air handler that holds the blower and coil. In a gas furnace home, the outdoor air conditioner pairs with an evaporator coil that sits on top of the furnace, and the furnace blower moves air for both seasons. Knowing which setup you have is the first step in comparing replacement options.

#### How do Rheem's efficiency and comfort levels differ?

Higher tiers usually add more efficient compressors and blowers, quieter operation and steadier temperatures. Entry tiers cover the basics well at a lower upfront cost.

Cooling efficiency is rated in SEER2, heat pump heating in HSPF2 and gas furnace efficiency in AFUE. New Rheem air conditioners and heat pumps use R-454B refrigerant under the federal refrigerant transition.

- Single-stage: runs at full output whenever it runs. Simple and dependable.
- Two-stage: has a lower setting for mild days, which means longer, quieter, more even cycles.
- Variable-speed: adjusts output in small steps for the steadiest temperatures and better moisture removal.

#### When does a Rheem system make sense for your home?

Rheem is a fit when you're replacing a central system and want a heat pump, a gas furnace or an air conditioner matched to your existing or improved ductwork.

Most Central Arkansas homes choose between a heat pump and a gas furnace for heat, paired with central air for cooling. The right answer depends on whether you have gas service, how the home is built and how you weigh upfront cost against monthly bills.

If you have rooms the ductwork doesn't reach, a Mitsubishi ductless system may be the better tool for that space.

A few questions help you decide whether it's time to replace rather than repair. How old is the system, and does it still use R-410A or an older refrigerant? Has it needed more than one significant repair recently? Are some rooms always too hot, too cold or too humid? Are your energy bills climbing even though your habits haven't changed?

If the answers point toward replacement, the next decision is the comfort level: single-stage, two-stage or variable-speed. Homes with humidity complaints or uneven rooms often notice the most difference from equipment that can run longer, slower cycles.

#### What goes wrong with any new system, including Rheem?

Most early problems trace back to installation: wrong size, leaky or undersized ducts, incorrect refrigerant charge or a poor match between indoor and outdoor parts.

An oversized air conditioner short cycles, leaving the house cool but clammy. Restrictive ductwork raises static pressure, which makes any blower louder and harder working. These issues don't depend on the brand, which is why we look at the ducts and the load, not just the equipment.

After a new install, a technician should confirm the details that don't show on a spec sheet: static pressure in the ductwork, the temperature difference across the coil, refrigerant charge, a properly pitched condensate drain with a working safety switch, and thermostat settings matched to the equipment. Those checks are what turn good equipment into a system that performs.

#### How does CASC install Rheem systems?

As a Rheem Pro Partner, we size the system, check the ductwork, install matched equipment, pull required permits and register your equipment with Rheem.

- Manual J load calculation when the home or system has changed, not on every replacement.
- Tiered replacement options so you can compare efficiency and comfort side by side.
- CASC install warranty: 10-year parts and 2-year labor, with optional 5- or 10-year extended labor.
- Manufacturer warranty terms vary by model; we register your equipment and walk you through what applies.

#### How do you get a Rheem estimate?

Request a free replacement estimate. We serve Little Rock, North Little Rock, Maumelle and the rest of our 16-city area from our North Little Rock shop.

Ask about current manufacturer rebates and available offers. Financing options are available.

#### Frequently asked questions

Q: Is Rheem a good fit for Arkansas heat and humidity?
A: Rheem makes two-stage and variable-speed equipment that runs longer, gentler cycles, which helps with moisture removal. Correct sizing and ductwork matter just as much.

Q: How long is the warranty on a Rheem system?
A: Manufacturer warranty terms vary by model, and we register your equipment. CASC's own install warranty is 10-year parts and 2-year labor on new HVAC installs.

Q: Do new Rheem systems use a different refrigerant?
A: Yes. New Rheem air conditioners and heat pumps use R-454B under the federal refrigerant transition away from R-410A.

### Rinnai Tankless Water Heaters: What to Know

URL: https://centralarservice.com/learning-center/rinnai-tankless-water-heaters
Type: Learn guide (Brands We Install). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

Rinnai makes gas tankless water heaters that heat water as it flows, so you don't run out the way a tank can. CASC is a Rinnai PRO and installs Rinnai tankless units across Central Arkansas, sizing the unit to your fixtures, checking gas and venting, and registering your equipment.

#### What is a Rinnai tankless water heater?

It's a wall-mounted gas water heater that fires a burner only when you open a hot tap, heating water on demand instead of keeping a tank hot all day.

Rinnai is a manufacturer widely known for gas tankless water heaters. Its residential line includes indoor and outdoor models, non-condensing and condensing designs, and models built for different household sizes.

Because a tankless unit makes hot water as you use it, the limit is flow rate, measured in gallons per minute, not tank size. Sizing is about how many fixtures might run at once.

When you open a hot tap, a flow sensor tells the unit water is moving, the burner fires and a heat exchanger warms the water to the set temperature on its way to the fixture. When the tap closes, the burner shuts off. There's no tank sitting at temperature between uses, which is where tankless units save standby energy.

#### Condensing or non-condensing: what's the difference?

Condensing models capture extra heat from the exhaust and vent through plastic pipe. Non-condensing models vent hotter exhaust through metal venting and cost less upfront.

Which one fits depends on where the unit goes, how venting can be routed and your efficiency goals. Some Rinnai models also offer recirculation features that shorten the wait for hot water at distant taps. We'll explain what applies to your layout.

#### When does a Rinnai tankless make sense?

Tankless fits homes that run out of hot water, want to free up floor space or plan to stay in the home for years.

Tankless units also mount on a wall, which frees floor space in a garage or utility closet. Rinnai makes models for different household sizes, so one unit can often cover a whole home when it's sized to the fixtures that run together.

If your home is all-electric, or the gas line can't be upsized practically, a Bradford White tank may be the simpler choice.

- Back-to-back showers that drain a tank.
- A garage or closet where a bulky tank is in the way.
- Gas service with room to support the unit's gas demand.

#### What goes wrong with tankless water heaters?

The usual troubles are mineral scale, undersized gas lines, venting mistakes and units sized too small for the household. Most are installation or upkeep issues.

Minerals in hard water can build up inside the heat exchanger. Periodic descaling keeps flow and efficiency where they should be. A gas line that was fine for a tank may be too small for a tankless burner, which shows up as fluctuating temperatures when several taps run.

Other common issues include venting that's too long or poorly sloped, a condensate line on a condensing unit that isn't drained correctly, and an inlet water filter screen that clogs with debris. Error codes on the unit's display usually point a technician toward the cause.

Homeowners sometimes notice a brief burst of cold water between back-to-back uses, or a minimum flow below which the burner won't fire. Both are normal traits of tankless heating, and good sizing and setup keep them from becoming a nuisance.

#### How does CASC install Rinnai tankless units?

As a Rinnai PRO, we size the unit to your fixtures, check gas line capacity, plan venting and condensate, and pull required permits.

Before quoting, we look at where the current water heater sits, how the gas line runs from the meter, where venting can exit the house and where condensate can drain. If the install calls for a new gas line or a different location, we explain why and include it in your pricing so there are no surprises.

- Fixture-by-fixture sizing based on how your household uses hot water.
- Gas line installation or upsizing when the existing line can't keep up.
- Manufacturer warranty terms vary by model; we explain what applies to your unit.

#### How do you get a Rinnai tankless estimate?

Water heater installs qualify for a free estimate. We'll look at your current setup and give you written pricing for tank and tankless options.

Call 501-307-1310, Monday through Sunday, 7 AM to 6 PM. Financing options are available.

#### Frequently asked questions

Q: Can a Rinnai tankless run out of hot water?
A: It won't run out the way a tank does, but it can only heat so many gallons per minute. Correct sizing keeps showers steady when several taps run.

Q: Does a tankless water heater need maintenance?
A: Yes. Periodic descaling removes mineral buildup from the heat exchanger. Many installs include isolation valves that make descaling easier, so ask about them when you plan the install.

Q: Can I put a tankless unit where my tank is now?
A: Often, but gas line size, venting and condensate routing decide it. We check all three before quoting.

### Bradford White Tank Water Heaters: What to Know

URL: https://centralarservice.com/learning-center/bradford-white-water-heaters
Type: Learn guide (Brands We Install). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

Bradford White makes gas and electric tank water heaters sold through plumbing professionals. CASC installs Bradford White tanks across Central Arkansas, sizing the tank to your household, bringing venting and safety parts up to current requirements, pulling required permits and registering the equipment. We also service all major water heater brands.

#### What is a Bradford White water heater?

Bradford White is an American manufacturer of storage-tank water heaters. Its residential line covers gas and electric models in a range of tank sizes and venting styles.

Bradford White sells through plumbing professionals rather than retail store shelves, so the tank is installed by the same contractor who stands behind the work.

A tank water heater keeps a set amount of water hot and ready. Gas models heat with a burner under the tank; electric models use heating elements inside it.

Gas tanks come in a few venting styles. Atmospheric models send exhaust up a metal flue by natural draft. Power-vent models use a fan to push exhaust out through a wall or roof, which helps when a chimney isn't available. The right style depends on where the tank sits and how the existing venting is set up.

#### How do you choose the right tank size?

Size the tank to your busiest hour, not the number of bedrooms alone. How many showers, laundry loads and dishwasher runs overlap decides it.

Fuel type matters too. Gas tanks generally recover faster after heavy use, while electric tanks need no venting and can go where a flue can't. We usually match what your home already has unless there's a good reason to change.

A tank that's too small runs out during the morning rush. One that's too big keeps extra water hot all day. We look at your household and fixtures, then recommend a size and fuel type that fit your space and gas or electric service.

If you keep running out even with a larger tank, a tankless unit may be worth comparing.

#### What wears out on a tank water heater?

Sediment, a spent anode rod and failing safety or heating parts are the common wear points. Leaks from the tank itself usually mean replacement.

Gas tanks also have a burner, a gas control and a flame sensing device that can fail with age. Electric tanks usually have two heating elements and two thermostats, and losing one element often shows up as hot water that runs out early rather than none at all.

Warning signs worth a call include rumbling or popping, rusty or smelly hot water, water around the base of the tank, a T&P valve that drips and a pilot or burner that won't stay lit.

- Sediment: minerals settle on the bottom, causing rumbling and slower heating.
- Anode rod: a sacrificial rod that protects the tank lining and wears down over time.
- T&P valve: the safety valve that releases pressure or heat if either gets too high.
- Expansion tank: absorbs pressure on closed plumbing systems so the tank isn't stressed.

#### How does upkeep extend a tank's life?

Flushing sediment and checking the anode rod and safety valve are the main habits. CASC's water heater flush is $159.

A flush clears sediment so the burner or elements heat water instead of minerals. During the visit we look at the T&P valve, venting and connections, and tell you plainly if the tank is near the end of its life.

#### How does CASC install Bradford White tanks?

We remove the old tank, set the new one with correct venting, gas or electrical connections and safety parts, and pull required permits.

On replacement day, we drain and remove the old tank, set the new one, connect water, gas or electric and venting, fill and purge the tank, then light or power it up and check for leaks and proper draft. Before we leave, we show you where the shutoff valve and gas control are and how to set the temperature.

- Sizing based on your household's busiest hour.
- Venting, gas connection and T&P discharge brought up to current requirements.
- Expansion tank added when your plumbing system calls for one.
- Manufacturer warranty terms vary by model; we explain what applies to your tank.

#### What's the next step?

Water heater installs qualify for a free estimate. If your current tank is leaking or not heating, book a repair visit first and we'll tell you whether it's worth fixing.

Call 501-307-1310, Monday through Sunday, 7 AM to 6 PM.

#### Frequently asked questions

Q: Gas or electric: which Bradford White tank should I get?
A: It usually follows what your home already has. Gas tanks recover faster; electric tanks need no venting. We'll go over the trade-offs for your setup.

Q: Do you only work on Bradford White water heaters?
A: No. We install Bradford White tanks and Rinnai tankless units, and we service all major water heater brands.

Q: How much is a water heater flush?
A: CASC's water heater flush is $159.

### Comfort and Plumbing Fixes for the Problem Spaces in Your Home

URL: https://centralarservice.com/learning-center/comfort-and-plumbing-by-space
Type: Learn guide (Comfort by Space). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

Most comfort and plumbing complaints come from specific spaces: a hot upstairs or bonus room, an addition or garage the ductwork doesn't reach, a house that feels muggy, or a slab floor hiding a leak. Each has its own causes and fixes, from airflow corrections and ductless systems to whole-home dehumidifiers and slab leak detection.

#### Why do some rooms have problems the rest of the house doesn't?

Because systems are designed for the house as a whole. Rooms far from the equipment, over garages, under roofs or added later often get less airflow or more heat than the design planned for.

Plumbing works the same way. A slab home has water lines under the floor where a leak can run unnoticed, and a humid house can hide moisture problems that a thermostat never shows.

The fix starts with figuring out which space is the problem and why, instead of replacing equipment and hoping.

#### Is your upstairs or bonus room too hot?

Usually it's airflow: undersized or leaky ducts, weak returns, or a room the system was never sized for. Duct corrections or a ductless unit often fix it.

Heat rises, roofs bake in summer and the ducts that serve second floors often run long distances through a hot attic. Bonus rooms over garages add exposed floors and knee walls to the mix.

Simple checks help: open every register, clear the returns and change the filter. If the room still lags, the answer is usually airflow, not a bigger air conditioner. Our hot upstairs guide walks through the causes and fixes in detail.

#### Need to heat or cool an addition, garage or sunroom?

A ductless mini-split is usually the cleanest answer. CASC installs Mitsubishi ductless systems that heat and cool a space without tying into your existing ducts.

Tapping a new room into existing ductwork can leave both the new space and the rest of the house short on air. Garages and sunrooms also gain and lose heat quickly through big doors and glass.

A ductless mini-split pairs an outdoor heat pump with an indoor head in the room, so the space gets its own heating, cooling and controls.

#### Does your house feel muggy even with the AC on?

An oversized or short-cycling AC, duct leaks in a humid crawlspace or attic, and Arkansas summers can all leave indoor air damp. A whole-home dehumidifier is one fix CASC installs.

Your AC removes moisture only while it runs with good airflow across a cold coil. Systems that cool fast and shut off, or ducts that pull damp air from a crawlspace, leave the air sticky.

We start by fixing the cooling system and ducts, then add a whole-home dehumidifier if the house still runs damp on mild days.

#### Could your slab-foundation home have a hidden leak?

Warm spots on the floor, a water bill that jumps, or the sound of running water with every tap off can point to a slab leak. Leak detection finds it before anyone breaks concrete.

Many Central Arkansas homes sit on concrete slabs with water lines running through or under them. A leak there can run for weeks before it shows.

A quick meter test tells you whether water is moving with everything off. If it is, leak detection finds where before any repair plan is made.

#### How does CASC approach a problem space?

We diagnose the space first, explain what we found in plain language and give you options. HVAC replacements and larger plumbing projects get a free estimate; repair visits start with a $99 service call ($149 weekends and holidays).

We serve 16 cities around Central Arkansas from our North Little Rock shop, Monday through Sunday, 7 AM to 6 PM. Same-day service when availability allows.

#### Frequently asked questions

Q: Do I need a bigger AC to fix a hot room?
A: Not usually. Hot rooms are more often an airflow or duct problem. A bigger unit can make humidity worse by short cycling.

Q: Can one ductless unit cool a garage or sunroom?
A: Often, yes. A single indoor head sized for the space is a common setup. We'll size it to the room.

Q: Will a slab leak repair mean tearing up my floors?
A: Not always. Leak detection pinpoints the leak first, then we explain repair options, including rerouting the line when that makes more sense.

### Why Your Upstairs or Bonus Room Is Hot, and How to Fix It

URL: https://centralarservice.com/learning-center/hot-upstairs-and-bonus-rooms
Type: Learn guide (Comfort by Space). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

Upstairs rooms and bonus rooms run hot because heat rises, roofs bake in summer and the ductwork serving them is often long, leaky or undersized. The fix is usually airflow: duct modifications, sealing and better returns. When ducts can't deliver enough, a ductless mini-split dedicated to that room is a reliable option.

#### Why is upstairs hotter than downstairs?

Warm air rises, the roof absorbs summer sun and second-floor ducts often run through a hot attic. Together they make upstairs rooms harder to cool than the rest of the home.

Bonus rooms over garages have it worse. They often have exposed floors over an unconditioned garage, knee walls next to attic space and a single long duct run added after the house was framed.

Two-story homes with one system have a built-in challenge. The thermostat usually sits downstairs, so the system shuts off once the first floor is comfortable, even while the second floor is still warm. Running the fan or nudging the setpoint helps a little, but it doesn't fix an airflow shortage.

#### What should you check yourself first?

Start with the simple things: supply vents open and unblocked, return grilles clear, a clean filter and doors that let air get back to a return.

- Open every supply register in the room and move furniture or rugs off them.
- Feel the airflow at the register with the system running. Weak flow points to a duct issue.
- Check that a return grille isn't blocked, and that the room isn't sealed off with the door closed.
- Replace a dirty filter. A clogged filter starves the whole house of airflow.

#### What usually causes a hot room?

Most hot rooms trace to ductwork: too small, too long, crushed, disconnected or leaking into the attic. Missing returns and high static pressure are also common.

A room can have plenty of supply air on paper and still be hot if there's no path for air to return to the system. Without a return, pressure builds and less cool air gets in.

Sometimes the room was never part of the original load. A bonus room finished years later may have a single duct tapped off a trunk that was already near capacity.

Attic ducts are another weak spot. Flex duct that's sagging, kinked or crushed by stored boxes loses airflow, and a joint that has pulled apart can dump cooled air straight into the attic. Insulation matters too: a duct running through a hot attic picks up heat before the air reaches the room.

#### What are the main fixes?

Correcting the ducts comes first: resizing runs, adding returns and sealing leaks. When ducts can't do it, a ductless mini-split can condition the room on its own.

Zoning, which uses dampers and multiple thermostats to split one system into separately controlled areas, is another approach used in the industry. Ask us whether it fits your home before assuming it's the answer.

Deciding between duct work and a ductless unit comes down to a few factors: whether the existing ducts can be reached and enlarged, whether the main system has capacity to spare, and how the room is used. A bonus room used every evening may justify its own ductless system, while a bedroom with one crushed duct may need only a repair.

- Duct modifications and airflow corrections to deliver more air where it's needed.
- Duct sealing so cooled air reaches the room instead of the attic.
- Adding or enlarging a return path for the room.
- A ductless mini-split for a bonus room the main system can't reach well.

#### How does CASC diagnose a hot upstairs?

We measure airflow and static pressure, inspect the ducts we can reach and look at returns. When the home or system has changed, we run a Manual J load calculation.

You get a plain explanation of what we found and options from simplest to most involved. A bigger air conditioner is rarely the fix; it often makes humidity worse.

If you're also planning a replacement, we'll fold the duct fixes into a free replacement estimate so the new equipment isn't fighting old ductwork. Ask about Rheem systems with two-stage or variable-speed blowers, which run longer, steadier cycles.

#### What's the next step?

Book a visit and tell us which rooms are uncomfortable and when. Service calls are $99 on weekdays and $149 on weekends and holidays.

We're open Monday through Sunday, 7 AM to 6 PM. Call 501-307-1310.

#### Frequently asked questions

Q: Will closing downstairs vents push more air upstairs?
A: Usually not much, and it can raise static pressure and strain the blower. Fixing the upstairs ducts is the better route.

Q: Is a ductless unit a good fix for a bonus room?
A: It often is. A ductless mini-split heats and cools the room independently, so it doesn't depend on a long duct run.

Q: Do I need a Manual J for a hot room?
A: Not always. We run one when the home or system has changed, such as a finished bonus room or a planned replacement.

### How to Heat and Cool an Addition, Garage or Sunroom

URL: https://centralarservice.com/learning-center/additions-garages-and-sunrooms
Type: Learn guide (Comfort by Space). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

The cleanest way to heat and cool a garage, sunroom, workshop or addition is usually a ductless mini-split. It works on its own, so you don't overload your existing system or run new ducts. CASC installs Mitsubishi ductless systems sized to the space, with an outdoor unit and one or more indoor heads.

#### Why not just extend the existing ductwork?

Your current system was sized for the house it serves. Adding a room to it can leave both the new space and the rest of the home short on airflow.

Garages and sunrooms also gain and lose heat much faster than living spaces because of large doors, glass and thinner insulation. A duct tapped off the main trunk rarely keeps up, and the thermostat in the hallway has no idea the sunroom is hot.

Sometimes extending ducts is the right call, such as a small addition next to a main trunk on a system with capacity to spare. We'll tell you when that's true.

A simple way to think about it: if the existing system already struggles on hot afternoons, it has no spare capacity to give a new room. If it keeps up easily and a trunk line runs right past the addition, a short extension may work. We check both before recommending either.

#### How does a ductless mini-split work in these spaces?

A ductless mini-split is a heat pump with an outdoor unit connected by a small line set to one or more indoor heads. Each head has its own controls.

Because it heats and cools, one system covers the space year-round. Installation needs only a small opening in the wall for the line set, condensate drain and wiring, so it suits finished rooms and garages alike.

CASC installs Mitsubishi ductless systems.

Indoor heads come in a few styles. Wall-mounted heads are the most common. Ceiling cassettes sit flush in the ceiling, and some systems use a small concealed air handler with short duct runs. The style depends on the room's layout and how visible you want the equipment to be.

#### Which spaces is it good for?

Garages, workshops, sunrooms, enclosed porches, room additions, converted attics and backyard offices are all common fits.

Before you call, think about how you'll use the space. A workshop used on weekends, a sunroom used every evening and a home office used all day each call for different sizing and controls. Note the room's dimensions, window area, insulation and whether it has an exterior door you'll open often.

- Garage or workshop: plan for big temperature swings and the garage door opening.
- Sunroom: lots of glass means high heat gain in summer and heat loss in winter.
- Room addition: a dedicated head avoids borrowing air from the main system.
- Bonus room or converted attic: a head on its own keeps it comfortable without long duct runs.

#### What goes wrong with these projects?

Common mistakes are an undersized unit for a glass-heavy room, poor indoor head placement, sloppy line set routing and a condensate drain that backs up.

Portable and window units often struggle in sunrooms and garages. Sizing to the space, mounting the head where it can move air across the room, and pitching the drain correctly matter more than the label.

Outdoor unit placement matters as well. It needs a level base, clearance for airflow and service, and a spot where the line set can reach the indoor head without long, awkward runs. The condensate drain must slope away from the head, and in some layouts a small pump is needed to move the water.

Insulation and air sealing in the space affect results too. A garage with an uninsulated door will always work harder than a finished room, and we size with that in mind.

#### How does CASC install ductless for a space?

We look at the room's size, windows, insulation and how you'll use it, then size the system, place the heads and route the line set cleanly.

We pull required permits and register the equipment. New HVAC installs carry CASC's 10-year parts and 2-year labor warranty, with optional extended labor. On our Residential HVAC Maintenance Plan, each indoor head counts as one system.

#### What's the next step?

Request an estimate. Tell us about the space and how you plan to use it, and we'll recommend a system and give you written pricing.

We serve 16 cities from our North Little Rock shop. Call 501-307-1310, Monday through Sunday, 7 AM to 6 PM.

#### Frequently asked questions

Q: Can a ductless system heat a garage in winter?
A: Yes. A ductless mini-split is a heat pump, so it heats as well as cools. Sizing accounts for the garage's insulation and door.

Q: Can one outdoor unit serve more than one room?
A: Some systems connect several indoor heads to one outdoor unit. Whether that fits depends on the rooms and distances involved.

Q: How does a mini-split count on the maintenance plan?
A: Each indoor head counts as one system on CASC's Residential HVAC Maintenance Plan: $189 for the first system and $99 for each additional, plus tax.

### Why Your House Feels Muggy, Even With the AC Running

URL: https://centralarservice.com/learning-center/humid-homes-and-crawlspaces
Type: Learn guide (Comfort by Space). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

A house feels muggy when the air conditioner cools without removing enough moisture. Common causes are an oversized or short-cycling AC, leaky ducts pulling damp air from a crawlspace or attic, and long humid Arkansas summers. Fixes include correcting the AC and ducts, and a whole-home dehumidifier, which CASC installs.

#### Why does the house feel sticky when it's cool?

Comfort depends on moisture as well as temperature. When indoor relative humidity stays high, 74 degrees feels clammy instead of comfortable.

Your air conditioner removes moisture as warm air crosses the cold evaporator coil and water condenses and drains away. That only works well when the system runs long enough, with the right airflow, for the coil to do its job.

That water drips into a drain pan and leaves through the condensate line. If the coil is dirty, the airflow is wrong or the system shuts off too soon, less water comes off the coil and more stays in the air. That's why a house can read the right temperature and still feel damp.

#### When is high humidity most likely?

Humidity problems show up in long, damp Central Arkansas summers, in spring and fall when the AC barely runs, and in homes over crawlspaces or with ducts in humid spaces.

A simple indoor humidity monitor can help you see the pattern. Note when readings run high, such as after showers, on rainy days or at night, and share that with your technician. It helps separate a cooling problem from a moisture source like a crawlspace or ductwork.

- Mild, rainy days when the AC cycles off before it removes much moisture.
- Homes with ductwork running through a crawlspace or attic.
- Houses that were tightened up with new windows or insulation without adjusting ventilation.
- Musty smells, condensation on windows or vents, or damp-feeling bedding.

#### What causes a muggy house with the AC running?

The usual culprits are an oversized AC that short cycles, leaky return ducts drawing damp air, a dirty coil or low airflow, and too much humid outdoor air getting in.

An oversized unit cools the thermostat quickly and shuts off before it has wrung out the air. Return ducts with gaps in a crawlspace pull in damp air and send it straight through the house.

Sizing matters here. When a replacement is planned, a Manual J load calculation helps avoid the oversized system that causes this in the first place.

#### What fixes high indoor humidity?

Fix the cooling system first, then add dedicated dehumidification if the home still runs damp. A whole-home dehumidifier removes moisture whether or not the AC is cooling.

Homes over crawlspaces or with a basement area can also have water that collects below the living space. CASC installs and repairs sump pumps and sewage ejector pumps, which move groundwater or wastewater out of low areas so it doesn't sit under the house adding moisture.

Choosing between fixes depends on the cause. If the AC is oversized or failing, repairing or correctly sizing it comes first. If the system is healthy but the house still runs damp on mild days, a whole-home dehumidifier adds moisture control the AC can't provide on its own.

- AC repair or tune-up to restore airflow and coil performance.
- Duct sealing so returns stop pulling air from the crawlspace or attic.
- A whole-home dehumidifier tied into your ductwork for steady moisture control.
- At replacement time, two-stage or variable-speed equipment that runs longer, gentler cycles.

#### How does CASC handle a humid home?

We check the AC's airflow, coil and run cycles, look at the ductwork we can reach, and explain whether repairs, duct work or a whole-home dehumidifier makes the most sense.

Repair visits start with a $99 service call on weekdays and $149 on weekends and holidays. If a whole-home dehumidifier or replacement is the right answer, you get written pricing before any work starts. A Rheem system with a variable-speed blower is one replacement option we'll talk through.

#### What's the next step?

Book a visit and tell us when the house feels damp and where. We serve Little Rock, North Little Rock and 14 more cities, Monday through Sunday, 7 AM to 6 PM.

#### Frequently asked questions

Q: Isn't my air conditioner supposed to dehumidify?
A: It does, but only while it runs with good airflow. Oversized or short-cycling systems cool fast and leave moisture behind.

Q: What does a whole-home dehumidifier do differently?
A: It removes moisture on its own schedule, even on mild days when the AC isn't running, and it ties into your ductwork to treat the whole house.

Q: Can a crawlspace make my house humid?
A: It can, especially if return ducts run through it and leak. Sealing those ducts keeps damp crawlspace air out of your living space.

### Slab-Foundation Homes: How to Spot and Fix a Slab Leak

URL: https://centralarservice.com/learning-center/slab-foundation-homes
Type: Learn guide (Comfort by Space). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

A slab leak is a leak in a water line under or inside a home's concrete foundation. Warning signs include warm spots on the floor, a rising water bill, running-water sounds with every tap off and damp flooring. CASC uses leak detection to pinpoint the leak, then explains repair options before any concrete is opened.

#### What is a slab leak?

It's a leak in a supply or drain line that runs under or through your concrete slab. Because the pipe is out of sight, water can escape for a while before anyone notices.

Many Central Arkansas homes are built on slabs, with water lines running through or beneath the concrete. Hot water lines tend to show leaks as warm spots, while cold lines may show only as moisture or a higher bill.

Slab leaks fall into two groups. Supply-line leaks are pressurized, so they run constantly and show up on the water meter. Drain-line leaks only leak when water goes down the drain, so they won't move the meter and are usually found with a camera inspection or other testing.

#### What are the warning signs?

Look for warm or damp areas on the floor, a water bill that rises without explanation, the sound of running water with fixtures off and cracks or lifting in flooring.

- A warm spot on tile or a floor you can feel barefoot.
- Damp carpet, swelling wood floors or mildew smells with no visible source.
- A water heater that seems to run constantly.
- Low water pressure throughout the house.

#### How can you check for a hidden leak yourself?

Turn off every faucet and water-using appliance, then watch your water meter. If the dial or leak indicator keeps moving, water is going somewhere.

This simple test doesn't tell you where the leak is, only that one likely exists. It could be a running toilet, an irrigation line or an underground water line outside. Rule out the easy ones, then call for leak detection.

Most meters have a small triangle or dial that spins with even a tiny flow. Note the reading, wait an hour or two without using water and check again. Also listen near floors and walls for hissing, and feel for warm spots along the path from the water heater to the fixtures it serves.

#### Why do slab leaks happen?

Pipes age, rub against concrete or gravel, and corrode over time. Ground movement can also add stress, and Central Arkansas has clay soils that shrink and swell with moisture.

High water pressure puts extra strain on every line in the house, including the ones under the slab. A failed or missing pressure reducing valve is worth checking if you've had more than one leak.

Slab homes with a low spot near the foundation can also collect water outside the slab during heavy rain. Where that's an issue, a sump pump moves groundwater away, and a sewage ejector pump lifts wastewater from fixtures that sit below the sewer line. CASC installs and repairs both.

#### How does CASC find and fix a slab leak?

We use leak detection to locate the leak before opening anything, then explain repair options: a spot repair through the slab or rerouting the line above it.

Detection usually starts with confirming the leak and isolating which line is losing water, hot or cold. From there, our technicians use leak detection tools to narrow the location so the repair can be planned around the smallest practical opening or a reroute.

Choosing between a spot repair and a reroute depends on the pipe's age and condition, where the leak is, what flooring sits above it and whether other leaks are likely along the same line. We walk you through the trade-offs and give you pricing before work starts.

- Leak detection to confirm and pinpoint the leak, including slab, hidden and water-line leaks.
- A spot repair when the damage is limited and the rest of the line is sound.
- Rerouting a line through walls or the attic when that's the more practical fix.
- Photos, written findings and documentation for insurance-related jobs. Coverage is between you and your insurer.

#### What's the next step?

If the meter test points to a leak, book a visit. Service calls are $99 on weekdays and $149 on weekends and holidays, and you get pricing before repairs start.

We're open Monday through Sunday, 7 AM to 6 PM. Same-day service when availability allows. Call 501-307-1310.

#### Frequently asked questions

Q: Does a slab leak always mean breaking up the floor?
A: No. Leak detection narrows the spot first, and rerouting the line can avoid opening the slab when that's the better option.

Q: Will my homeowner's insurance cover a slab leak?
A: That depends on your policy. CASC provides photos, written findings and documentation, but we can't tell you what your insurer will cover.

Q: Should I shut off my water if I suspect a slab leak?
A: If you see active water damage, closing the main shutoff limits it until a plumber arrives. Know where your main shutoff is before you need it.

### Commercial HVAC and Plumbing Needs by Building Type

URL: https://centralarservice.com/learning-center/commercial-by-building-type
Type: Learn guide (Commercial). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

Different buildings stress HVAC and plumbing in different ways. Restaurants push drains, grease traps and rooftop units hard; offices and shops need steady comfort and working restrooms during business hours. CASC serves business owners, property managers, landlords and facility managers with commercial HVAC and commercial plumbing service across Central Arkansas.

#### Why does building type change what you need?

Use drives wear. A kitchen exhausts heat and sends grease down the drains all day, while an office's main load is people, lights and computers. The service plan should match.

Most commercial buildings in our area run packaged rooftop units, split systems or mini-splits for heating and cooling, and a mix of restrooms, kitchens and floor drains for plumbing. What changes is how hard each part works and what a breakdown costs the business.

A few questions shape the right service plan for any building. How many heating and cooling units serve the space, and how old are they? How many restrooms and kitchens are there? Does a grease trap or interceptor serve the building? Is there a backflow preventer that needs periodic testing? Who has roof access, and when can work happen without disrupting customers or tenants?

#### What commercial HVAC work does CASC handle?

We service, repair, replace, install and maintain commercial rooftop units (RTUs), split systems and mini-splits. New construction is not our focus.

Packaged rooftop units are common on restaurants, shops and offices because the whole system sits on the roof, out of the way. Split systems put the condenser outside and the air handler inside, and mini-splits cover individual rooms like server closets or offices added later.

Whatever the setup, the work is the same at heart: clean coils, good airflow, sound electrical parts and correct refrigerant charge.

#### What commercial plumbing work does CASC handle?

Drain cleaning, hydro-jetting, camera inspections, sewer work, leak detection and repair, water heaters, gas lines, backflow and grease traps or interceptors.

Commercial plumbing sees heavier use than a home: more restrooms, more people, larger drains and, in food service, grease. Backflow preventers protect the public water supply and need periodic testing.

We handle the routine and the urgent, from clearing a restroom line to camera-inspecting a sewer lateral and servicing grease traps and interceptors.

Recurring drain trouble is a common reason businesses call. When a line keeps clogging, a camera inspection shows whether the cause is grease, roots, a sag or damaged pipe, and that decides whether hydro-jetting, a repair or sewer line replacement makes sense.

#### What does a commercial maintenance program include?

CASC's Commercial HVAC Maintenance Program is quarterly, includes filters we supply, gives you priority scheduling and a 10% repair discount. It covers HVAC only, and pricing is by quote.

Quarterly visits fit buildings where comfort affects customers and staff. Each visit is a chance to change filters, clean and inspect equipment and flag worn parts so repairs can be planned instead of rushed.

Skipping maintenance tends to show up at the worst time: a rooftop unit that quits on a hot afternoon, or a heating failure on the first cold morning of the season. A quarterly schedule spreads attention through the year so seasonal changeovers are planned.

#### Which building types are covered in this guide?

Restaurants and food service, and offices and retail. Each guide covers the systems that work hardest in that building, what tends to fail and how to plan service around business hours.

Property managers and landlords with mixed portfolios can use both. If your building doesn't fit either, call and describe it; the same RTU, split system and plumbing basics apply.

Landlords with residential rentals can call us too. Single-family rentals and small multifamily buildings use the same residential equipment we service every day, and we can coordinate access with tenants when you tell us how you prefer to handle it.

#### How do you get started?

Request a commercial quote. Commercial HVAC projects get a free estimate, and the maintenance program is priced by quote for your equipment.

Call 501-307-1310, Monday through Sunday, 7 AM to 6 PM, or send the contact form.

It helps to have a short equipment list ready: the number of rooftop units or split systems, approximate ages if known, restrooms and kitchens, and any recent repairs. That lets us give you a quote that matches your building.

#### Frequently asked questions

Q: Who does CASC work with on commercial jobs?
A: Business owners, property managers, landlords and facility managers across our Central Arkansas service area.

Q: Does the commercial program cover plumbing?
A: No. The Commercial HVAC Maintenance Program is HVAC only. Commercial plumbing service is handled separately.

Q: Do you do new commercial construction?
A: New construction is not our focus. We concentrate on service, repair, replacement, installation and maintenance for existing buildings.

### HVAC and Plumbing for Restaurants and Food Service

URL: https://centralarservice.com/learning-center/restaurants-and-food-service
Type: Learn guide (Commercial). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

Restaurants work their plumbing and HVAC harder than most buildings. Grease, food solids and hot water stress kitchen drains and grease traps, while cooking heat and constant door traffic load the rooftop units. Planned drain care, grease trap service and quarterly HVAC maintenance help prevent the breakdowns that close a dining room.

#### What makes restaurant systems different?

Kitchens send grease and food solids down the drains, use large amounts of hot water and pump heat into the building all day. Every system runs closer to its limit.

Restaurants also tend to run long hours and can't easily close a section of the building for repairs. That makes planned maintenance and a contractor who already knows your equipment more valuable than in most buildings.

A slow floor drain or a warm dining room in July is more than an annoyance. It can mean lost covers, unhappy staff and trouble at inspection time. Planning service around your hours matters as much as the repair itself.

#### How do grease traps and interceptors work?

They slow kitchen wastewater so fats, oils and grease float and solids settle, keeping them out of the sewer. They need regular pumping and cleaning to keep working.

When a trap or interceptor fills, grease passes into the lines downstream and builds up into blockages. Your local wastewater utility sets the requirements for pumping and inspection; confirm the rules that apply to your location with them.

Smaller grease traps often sit under or near sinks inside the kitchen, while larger interceptors are usually buried outside with access lids. Both work the same way and both fail the same way when they're not emptied: grease escapes downstream, odors build and lines begin to slow.

Kitchen habits help. Scraping plates into the trash, using sink strainers and keeping cooking oil out of drains all reduce how much grease reaches the trap between service visits.

#### What goes wrong in restaurant plumbing?

The usual problems are grease buildup in kitchen lines, slow floor drains, overloaded traps, water heaters that can't keep up and backflow devices that are due for testing.

For grease-coated lines, hydro-jetting scours the pipe walls instead of just punching a hole through the blockage. A camera inspection shows what's actually in the line.

Gas lines are part of the picture too. Ranges, fryers and water heaters all depend on properly sized gas piping, and adding equipment can push an existing line past what it was designed to deliver. CASC installs and repairs gas lines for commercial kitchens.

- Kitchen line blockages that snaking clears temporarily but grease rebuilds.
- Floor drains and sinks backing up during a rush.
- Water heaters straining under dishwashing and prep demand.
- Backflow preventers that need testing or repair.

#### What goes wrong with restaurant HVAC?

Rooftop units fight kitchen heat, open doors and grease-laden air. Dirty coils, clogged filters and worn belts or motors are the common reasons a dining room runs warm.

Coils and filters load up faster near a kitchen, which cuts capacity right when it's needed most. Regular cleaning and filter changes keep the RTU working at full output.

Kitchen exhaust also pulls air out of the building, and that air has to be replaced from somewhere. When dining rooms feel drafty or doors are hard to open, the building may be under negative pressure, which makes the rooftop units work harder. A technician looks at the whole balance, not just the unit.

Signs a rooftop unit needs attention include a dining room that warms through the lunch rush, ice on refrigerant lines, unusual noises from the roof and water dripping from ceilings near the unit.

#### How does CASC support restaurants?

We handle commercial plumbing, including grease traps, drains, jetting, camera inspections, water heaters, gas lines and backflow, plus commercial HVAC service and maintenance on RTUs, splits and mini-splits.

Our Commercial HVAC Maintenance Program is quarterly, includes filters we supply, gives you priority scheduling and a 10% repair discount on HVAC. It's priced by quote. Plumbing service is scheduled separately.

#### What's the next step?

Request a commercial quote. Tell us about your kitchen, your rooftop units and any recurring drain trouble, and we'll recommend a service plan.

We're available Monday through Sunday, 7 AM to 6 PM. Call 501-307-1310.

#### Frequently asked questions

Q: How often should a grease trap be pumped?
A: It depends on the trap's size and your volume, and your local wastewater utility sets requirements. We can help you work out a schedule.

Q: Is hydro-jetting better than snaking for kitchen lines?
A: For grease buildup, hydro-jetting usually cleans the pipe walls more thoroughly, while snaking opens a path through a blockage. A camera inspection helps decide.

Q: Does the commercial maintenance program include filters?
A: Yes. Filters are included and CASC supplies them. The program is quarterly and covers HVAC only.

### HVAC and Plumbing for Offices and Retail Spaces

URL: https://centralarservice.com/learning-center/offices-and-retail
Type: Learn guide (Commercial). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

Offices and retail spaces need steady comfort and working restrooms during business hours. Most run rooftop units or split systems, sometimes with mini-splits for server rooms or add-on spaces. Quarterly HVAC maintenance, planned repairs and attention to restrooms, water heaters and backflow devices keep small problems from closing the doors.

#### What systems do most offices and shops run?

Packaged rooftop units and split systems handle most heating and cooling. Mini-splits often cover server closets, add-on offices or spaces the main system can't reach.

On the plumbing side, restrooms, break rooms, a water heater and the building's backflow preventer do most of the work. In multi-tenant buildings, several units and restrooms may be shared, which makes scheduling and access part of every job.

Many buildings in our area have several rooftop units, each serving a different zone or suite. Knowing which unit serves which space makes troubleshooting much faster and helps you plan replacements one unit at a time instead of all at once.

#### What usually goes wrong?

Uneven temperatures between rooms, units that run constantly, failed capacitors or motors, clogged restroom lines, running toilets and water heaters that can't keep up are the common calls.

In retail, doors opening all day add heat and humidity, and in offices, conference rooms and server closets often run warmer than the rest of the space. Those patterns help point to the cause.

Restrooms in busy shops and offices see heavy use, and the common problems are clogs from paper products, running toilets, leaking flush valves and faucets that won't shut off fully. Water heaters serving break rooms and restrooms can also wear out quietly until the water runs cold.

- Hot or cold spots from dirty filters, coils or airflow problems.
- Rooftop units with worn belts, motors or electrical parts.
- Restroom clogs and fixture leaks that need prompt attention.
- Backflow preventers that need testing or repair.

#### How do you keep service from disrupting business?

Plan it. Regular maintenance catches worn parts before they fail, and scheduling work early or late in the business day keeps customers and staff comfortable.

Shared buildings add another wrinkle. Tell us which units serve which suites, how to reach the roof and whether tenants need notice, so the visit goes smoothly.

Our hours are Monday through Sunday, 7 AM to 6 PM, which gives many shops and offices room to schedule work before opening or on a slower day. Let us know about access, keys and roof hatches up front.

For planned work like a unit replacement or a water heater swap, we agree on timing ahead of time and explain what will be shut off and for how long it is expected to take, so you can let staff and customers know.

#### What does the Commercial HVAC Maintenance Program include?

Quarterly visits, filters included and supplied by CASC, priority scheduling and a 10% repair discount. It covers HVAC only and is priced by quote for your equipment.

Quarterly visits suit buildings where comfort affects sales or productivity. Each visit is a chance to clean, inspect and tell you about anything that's wearing out, so repairs can be planned instead of rushed.

A typical maintenance visit includes changing filters, checking belts and motors, cleaning or inspecting coils, checking electrical connections and controls, confirming refrigerant system operation and clearing condensate drains. Findings are reported so you can plan for repairs before they become breakdowns.

#### How does CASC work with property managers and landlords?

We service, repair, replace, install and maintain commercial HVAC, and handle commercial plumbing from drains and leaks to water heaters, gas lines and backflow.

When equipment reaches the end of its life, commercial HVAC projects get a free estimate. You get clear findings and written pricing you can share with an owner or tenant.

When deciding between repair and replacement on an older rooftop unit, the factors are the unit's age and condition, how often it has needed repairs, the refrigerant it uses and whether it keeps the space comfortable. We lay those out plainly so an owner can make the call.

#### What's the next step?

Request a commercial quote. Tell us how many units and restrooms you have and what's been giving you trouble.

Call 501-307-1310 or send the contact form.

#### Frequently asked questions

Q: Can you service rooftop units on a multi-tenant building?
A: Yes. We service commercial rooftop units, split systems and mini-splits. Let us know about roof access and which units serve which tenants.

Q: Is the commercial program priced online?
A: No. The Commercial HVAC Maintenance Program is priced by quote based on your equipment.

Q: Do you test backflow preventers for businesses?
A: Yes. CASC installs, repairs and tests backflow preventers.

### Symptom Guide: What Your Heating, Cooling or Plumbing Is Telling You

URL: https://centralarservice.com/learning-center/symptom-guide
Type: Learn guide (Symptoms). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

Most heating, cooling and plumbing problems announce themselves with a symptom: no heat, no hot water, warm air from the AC, water around the unit or weak water pressure. This guide covers what each usually means, the safe checks you can do yourself, and when it's time to book a CASC repair visit.

#### What should you do first when something stops working?

Stay safe, then check the simple things. Thermostat settings, breakers, filters and shutoff valves cause a surprising share of service calls.

If you smell gas, don't troubleshoot. Leave the home and call your gas utility from outside. For everything else, a few minutes of checking can either solve the problem or give our technician useful information.

Write down what you notice: when the problem started, any sounds or smells, error codes or blinking lights, and anything that changed recently, like a power outage or a new thermostat. Those details help a technician diagnose faster and can save time on the visit.

Know where your shutoffs are before you need them: the main water shutoff, the valve on the water heater's cold supply, the HVAC breaker and the furnace power switch.

#### Is your heat not working?

Check the thermostat mode and setpoint, the breaker and furnace switch, the filter and the furnace door panel. Heat pumps also have defrost cycles and backup heat that can look like problems.

A lot of no-heat calls start with a thermostat set to the wrong mode, a tripped breaker, a furnace switch bumped off or a clogged filter that made the furnace shut itself down.

Heat pumps add two normal behaviors that can look like trouble: defrost cycles that melt frost off the outdoor coil, and air that feels cooler than furnace air. Our heat troubleshooting guide covers both.

#### Do you have no hot water, or not enough?

Gas tanks often point to the ignition or pilot; electric tanks to a breaker or element. Not enough hot water can mean sediment, a broken dip tube or an undersized heater.

First decide which one you have. No hot water at all points to the heat source, like a pilot, ignition, breaker or element. Hot water that runs out early points to sediment, a dip tube or tank size.

If only one faucet runs cold, the faucet is the likely cause, not the water heater.

If you see water around the base of the tank, turn off the cold water supply valve to the heater and turn the gas control to Off or switch off the breaker for an electric unit, then book a visit.

#### Is your AC blowing warm air or leaking water?

Warm air often traces to the thermostat, a dirty filter, a tripped outdoor breaker or a refrigerant or electrical problem. Water around the indoor unit usually means a clogged condensate drain.

Our blog already covers both in detail, so we link to those posts here instead of repeating them. Start with the thermostat, the filter and the outdoor unit's breaker, then look at the condensate drain if you see water.

#### Is your water pressure low or is the water heater leaking?

Low pressure at one fixture is often a clogged aerator; low pressure everywhere can mean a pressure valve or a hidden leak. Water at the base of a tank needs prompt attention.

Low pressure everywhere, along with a rising water bill, is worth a closer look because it can point to a hidden leak. Water from the T&P discharge pipe or the tank itself needs a call.

#### When should you call CASC?

Call when the simple checks don't fix it, a breaker trips again, you see water where it shouldn't be or a system shows an error code. We're open Monday through Sunday, 7 AM to 6 PM.

Service calls are $99 on weekdays and $149 on weekends and holidays, for both HVAC and plumbing. Same-day service when availability allows. You get pricing before any repair begins.

Some symptoms mean you should stop using the equipment until it's checked: a breaker that trips again after one reset, water spreading from a water heater or indoor unit, a burning smell from the system, or a T&P valve discharging water. Turn the equipment off and book a visit.

#### Frequently asked questions

Q: Is the service call fee credited toward the repair?
A: No. The service call is $99 on weekdays and $149 on weekends and holidays, and it covers the visit and diagnosis.

Q: What if I smell gas?
A: Don't flip switches or try to find the source. Leave the home and call your gas utility from outside.

Q: Can CASC come out the same day?
A: Same-day service when availability allows. We're open Monday through Sunday, 7 AM to 6 PM.

### Heat Not Working? Furnace and Heat Pump Troubleshooting

URL: https://centralarservice.com/learning-center/heat-not-working
Type: Learn guide (Symptoms). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

When the heat stops working, start with safe checks: thermostat mode and setpoint, batteries, the breaker and furnace switch, the filter and the furnace door panel. Heat pumps also run normal defrost cycles. If the simple checks don't fix it, or you see an error code, book a CASC heating repair visit.

#### What should you check first?

Start at the thermostat. Make sure it's set to Heat, the setpoint is a few degrees above room temperature and the display isn't blank from dead batteries.

- Mode set to Heat, not Cool or Off, and fan on Auto.
- Setpoint a few degrees above the current room temperature.
- Fresh batteries if the display is dim or blank.
- Any schedule or hold setting that might be overriding you.

#### What can you safely check at the furnace?

Check the breaker, the furnace power switch, the filter, the door panel and the status light. Don't open the burner compartment or work on gas parts.

If other gas appliances aren't working either, the gas supply to the house may be off. Contact your gas utility rather than working on valves yourself. If you smell gas at any point, leave the home and call your gas utility from outside.

- Breaker: reset a tripped HVAC breaker once. If it trips again, leave it off and call.
- Furnace switch: it often looks like a light switch near the unit and can be bumped off.
- Filter: a clogged filter can make a furnace overheat and shut itself down.
- Door panel: many furnaces won't run unless the front panel is fully seated.
- Status light: a blinking light usually means an error code, often explained on a label inside the door.
- Condensate drain: high-efficiency furnaces shut down if their drain line clogs.

#### Why does a heat pump blow air that feels cool?

Heat pump air is warm but not as hot as furnace air, so it can feel cool on your hand. That's normal as long as the house is holding temperature.

In cold, damp weather the outdoor unit periodically runs a defrost cycle to melt frost off its coil. You may see steam and hear a whoosh, and the system may briefly blow cooler air. A light coat of frost is normal; a thick block of ice that doesn't clear is not.

On very cold days, auxiliary heat helps the heat pump keep up. If the system runs on auxiliary heat constantly, or never seems to catch up, something needs attention.

#### What usually goes wrong?

For furnaces, common causes are a dirty flame sensor, ignition problems, a failed inducer or blower motor, or a safety switch tripping. For heat pumps, it's often refrigerant, defrost or electrical issues.

A furnace that lights and then shuts off after a few seconds often points to a flame sensor that needs cleaning. Repeated overheating trips can point to airflow problems. Our technicians also inspect the heat exchanger, because cracks there are a safety concern, not just a comfort issue.

#### How does CASC handle a heating repair?

A technician diagnoses the system, explains what failed in plain language and gives you pricing before any repair. We service all major brands of furnaces and heat pumps.

Service calls are $99 on weekdays and $149 on weekends and holidays. We're open Monday through Sunday, 7 AM to 6 PM. Same-day service when availability allows. If the system is near the end of its life, we'll tell you and you can request a free replacement estimate.

#### How can you avoid the next no-heat call?

Change the filter regularly and have the system checked before cold weather. CASC's Residential HVAC Maintenance Plan includes a fall heating visit.

The plan is $189 for the first system and $99 for each additional, plus tax, with spring and fall visits and 10% off qualifying repairs and service-call fees.

#### Frequently asked questions

Q: Why does my furnace start, then shut off?
A: A dirty flame sensor is a common cause, along with airflow problems that trip a safety switch. Both need a technician to diagnose.

Q: Is ice on my heat pump normal?
A: Light frost is normal and clears during defrost. A thick block of ice that stays, or ice on the top of the unit, needs a repair visit.

Q: Can I reset the breaker more than once?
A: Reset it once. If it trips again, leave it off and call, since repeated trips point to an electrical problem.

Q: How much is a heating service call?
A: $99 on weekdays and $149 on weekends and holidays.

### No Hot Water? What's Going On and What to Check

URL: https://centralarservice.com/learning-center/no-hot-water
Type: Learn guide (Symptoms). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

No hot water usually comes down to the heat source: a gas water heater whose pilot or ignition has failed, an electric heater with a tripped breaker or bad element, or a tankless unit showing an error. Not enough hot water often points to sediment, a broken dip tube or a heater too small for the household.

#### Is it no hot water, or not enough?

The difference narrows the cause. No hot water at all points to the heat source. Hot water that runs out quickly points to the tank's capacity or its internal parts.

Also note whether the problem is at every faucet or just one. A single cold fixture is usually a faucet or mixing valve issue, not the water heater.

Think about timing too. Hot water that disappears after one shower points to capacity or a failed part. Hot water that slowly got worse over months points to sediment or a dip tube. Water that suddenly went cold after a storm or power flicker points to a tripped breaker or a pilot that went out.

#### What can you safely check on a gas water heater?

Look at the status light or pilot window, confirm the gas control is set to On rather than Vacation or Pilot, and check whether other gas appliances work.

If you smell gas, don't light anything. Leave the home and call your gas utility from outside.

Also look at the area around the heater. Make sure nothing is stored against it, the burner access cover is in place and the vent pipe on top is connected and not visibly damaged. Don't remove covers or work on the gas control yourself.

- Status light: many newer gas tanks blink a code that's explained on the label.
- Older tanks with a standing pilot: if the label's lighting instructions are clear and you're comfortable, follow them exactly. If it won't stay lit, call.
- Thermostat dial: make sure it wasn't turned down or set to Vacation.
- Gas supply: if no gas appliance works, contact your gas utility.

#### What about electric and tankless water heaters?

For electric tanks, check the breaker. For tankless units, check the display for an error code and make sure the gas and water valves serving it are open.

If an electric water heater's breaker trips again after one reset, leave it off and call; that often means a shorted element. A tankless unit that shuts off mid-shower can be scaled up inside, short on gas supply or seeing too little flow to fire. Descaling and correct sizing fix many of these.

#### Why does the hot water run out too fast?

Common reasons are sediment taking up space in the tank, a broken dip tube mixing cold water into the hot, a failed heating element or a tank too small for your household.

Temperature setting plays a part as well. A tank set too low will feel like it runs out sooner, while setting it higher raises scald risk. A technician can help you find a sensible setting for your household and check that the thermostat is holding temperature.

- Sediment: rumbling or popping sounds and slower heating. A flush helps.
- Dip tube: lukewarm water soon after the tap opens.
- Element or thermostat: electric tanks lose capacity when one element fails.
- Size: a growing household may simply outrun the tank.

#### When is water at the tank a warning sign?

A little water from the T&P discharge pipe can mean the safety valve did its job releasing high pressure or heat. Water from the tank body usually means the tank is failing.

Never cap or plug the T&P valve or its discharge pipe. If it's dripping or discharging, call so we can find out why. If the tank itself is leaking, turn off the water supply to the heater and its power or gas control, then book a visit.

#### How does CASC handle a water heater repair?

We diagnose the heater, explain whether repair makes sense for its age and condition, and give you pricing before work begins. We service all major brands.

Service calls are $99 on weekdays and $149 on weekends and holidays. A water heater flush is $159. If replacement is the better call, water heater installs qualify for a free estimate. We're open Monday through Sunday, 7 AM to 6 PM. Same-day service when availability allows.

#### Frequently asked questions

Q: Why do I have hot water in some faucets but not others?
A: That usually points to a faucet cartridge or mixing valve at the cold fixture, not the water heater.

Q: Can flushing my water heater bring back hot water?
A: If sediment is the problem, a flush can restore capacity. CASC's water heater flush is $159.

Q: Is it worth repairing an older water heater?
A: It depends on the part, the tank's condition and its age. A leaking tank body usually means replacement; a failed element or thermostat often doesn't.

### Permits and Code for HVAC and Plumbing Work in Central Arkansas

URL: https://centralarservice.com/learning-center/permits-and-code-in-central-arkansas
Type: Learn guide (Permits & Code). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

Many HVAC and plumbing jobs in Central Arkansas cities, like equipment replacement, water heater swaps, gas line work and sewer line work, commonly need a permit and an inspection. Your city building department issues most permits, state agencies license the trades, and a licensed contractor usually pulls the permit for you.

#### What is a permit, and who is the AHJ?

A permit is permission from your local government to do regulated work, followed by an inspection that checks the work against the adopted code. The office that makes that call is the authority having jurisdiction, or AHJ.

For most homes and businesses in our area, the AHJ for a permit is the city building or planning department. State agencies set the trade rules: they license plumbers, gas fitters and HVAC contractors, and they maintain the state plumbing, fuel gas and mechanical codes that inspectors use.

Think of it in two layers. The state decides who is allowed to do the work. Your city, or in some areas a state-certified inspector, decides whether a specific job at your address passed.

#### Which jobs usually need a permit?

Work that changes or replaces equipment tied to gas, refrigerant, water supply or sewer commonly needs a permit and inspection in Arkansas cities. Who pulls it, and how, varies by city.

Small repairs, like swapping a capacitor or clearing a drain, usually do not. When in doubt, ask before work starts, not after.

- Replacing an air conditioner, furnace, heat pump or ductless system
- Replacing or adding a tank or tankless water heater
- Running, extending or replacing a gas line
- Repairing or replacing a sewer line, especially when digging is involved
- Installing a backflow preventer on a water service

#### Who handles permits in our priority cities?

Each city runs its own permit office. These are the offices we confirmed on each city's official website. Use the links to check current rules for your address.

In our other service cities, call city hall and ask for the building or permits office. Outside city limits, ask the county.

At the state level, the Arkansas Department of Health's Plumbing and Natural Gas section licenses plumbers and gas fitters and supervises plumbing and gas inspections, including inspectors it certifies for designated areas. The HVAC/R Licensing Board at the Arkansas Department of Labor and Licensing licenses HVAC contractors.

- Little Rock: the Building Codes Division of the Planning and Development Department issues building, plumbing, mechanical and electrical permits and runs inspections.
- North Little Rock: the Planning Department handles permits and has mechanical (HVAC) and plumbing inspectors.
- Maumelle: Planning and Permits. The city's permit page lists HVAC, plumbing and electrical installations and replacements, plus water heater replacement, among work that needs a permit.
- Conway: Building Permits and Inspections processes construction permits and performs field inspections.
- Benton: the Community Development Department handles building permits and applications.
- Bryant: Planning and Development issues construction permits, with separate trade permits for mechanical, plumbing and fuel gas work.

#### What can go wrong when work isn't permitted?

Unpermitted work can be ordered stopped, fail a later inspection, or need to be opened back up and redone. It can also cause questions when you sell the home or file an insurance claim.

None of this is a scare tactic. A permit is simply a second set of eyes on work that involves gas, water and electricity in your home.

- An inspector finds the work later and asks for it to be corrected or uncovered for inspection
- A buyer's inspector or lender flags equipment that was never permitted
- An insurance adjuster asks for proof the work was done to code
- A safety problem, like a poorly vented water heater or a leaking gas fitting, goes unnoticed

#### How does CASC handle permits?

Central Arkansas Service Company is licensed and certified, fully insured and bonded, and we pull the required permits as part of the job. You should not have to chase paperwork on work we do.

When we give you a free estimate on an HVAC replacement or a larger plumbing project, permits are part of the plan we go over with you. Have a question about permits for your address? Ask at the estimate.

#### What should you do next?

If you are planning a replacement or a bigger plumbing project, start with a free estimate. If you are hiring anyone, ask who pulls the permit before work begins.

#### Frequently asked questions

Q: Can I pull my own permit as a homeowner?
A: Some cities let a homeowner who lives in the house pull certain permits and do the work, as long as it meets code and passes inspection. Maumelle's permit page says this, for example. Gas, refrigerant and licensed trade work often have extra rules, so ask your city first.

Q: Who pulls the permit when I hire a contractor?
A: Usually the licensed contractor doing the work pulls it. Maumelle's permit page tells homeowners who hire out to make sure the service company has purchased the permit. CASC pulls the required permits on our jobs.

Q: Does the state or the city inspect plumbing and gas work?
A: It depends on where you live. Many cities have their own plumbing and gas inspectors. The Arkansas Department of Health also certifies inspectors who cover designated areas of the state. Your city or the Department of Health can tell you who inspects your address.

Q: How much does a permit cost, and how long does it take?
A: Fees and review times are set by each city and change over time, so we do not list them here. Your city's permit office publishes current fees, and CASC includes required permits in the plan for your job.

Note: This guide is general, educational information, not legal advice. Permit and inspection requirements vary by city and county, and they change. Confirm current requirements with your local building department or the authority having jurisdiction before work begins.

### Do You Need a Permit to Replace an AC, Furnace or Heat Pump?

URL: https://centralarservice.com/learning-center/permits-hvac-replacement
Type: Learn guide (Permits & Code). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

Replacing an air conditioner, furnace, heat pump or ductless system commonly needs a mechanical permit and inspection in Central Arkansas cities, because the job involves refrigerant, gas, venting and electrical connections. A licensed HVAC contractor usually pulls the permit. Check with your city building department before work begins.

#### What is an HVAC replacement permit?

It is a mechanical permit from your city that covers installing or replacing heating and cooling equipment. After the work, an inspector checks it against the mechanical and fuel gas codes your city enforces.

In Arkansas, HVAC contractors are licensed by the HVAC/R Licensing Board at the Arkansas Department of Labor and Licensing. The board also oversees the state mechanical and fuel gas codes. Your city permit office decides whether your specific job needs a permit and inspection.

Every city has its own checklist, but an HVAC inspection generally looks at the same safety basics:

- Equipment set level and installed the way the manufacturer's instructions call for
- Gas piping, shutoff valve and furnace venting on gas equipment
- A disconnect near the outdoor unit and wiring sized for the equipment
- Condensate drain lines that carry water away and do not leak into the house
- Sealed duct connections at the equipment and room to service the unit

#### When does an HVAC job need a permit?

Full equipment replacement is the most common trigger. Swapping a part during a repair usually is not. Who pulls the permit, and what it covers, varies by city.

- Replacing an outdoor AC or heat pump, an indoor furnace or air handler, or a whole split system
- Adding a ductless mini-split or extending heating and cooling to an addition
- Changing fuel type, such as moving from a gas furnace to a heat pump
- Major duct changes, new gas piping to a furnace, or new electrical circuits for equipment

#### What do local offices say about HVAC permits?

Each city sets its own process. Maumelle's permit page lists mechanical (HVAC) installations and replacements among work that needs a permit. Other cities list mechanical permits as a separate trade permit.

Live somewhere else in our service area? Call your city hall and ask for the building or permits office.

- Little Rock: the Building Codes Division issues mechanical permits and has a Mechanical Inspections section.
- North Little Rock: the Planning Department handles permits and has a chief mechanical (HVAC) inspector.
- Conway: Building Permits and Inspections processes trade permits and performs field inspections.
- Benton: Community Development handles building permits and applications.
- Bryant: Planning and Development lists a mechanical trade permit, including replacements.

#### What about refrigerant rules?

Refrigerant is regulated federally. Under Clean Air Act Section 608, technicians who service, repair or dispose of equipment that could release refrigerant must be EPA certified, and venting refrigerant on purpose is prohibited.

The EPA's Technology Transitions program also limits higher-impact HFC refrigerants in new air conditioning and heat pump equipment. That is why many new systems use refrigerants like R-454B instead of R-410A.

For a replacement, that changes a few things. R-454B is an A2L refrigerant, which means mildly flammable, so new equipment built for it includes added safety features, and installers follow the manufacturer's A2L instructions. The indoor coil and outdoor unit need to be designed for the same refrigerant, so a new R-454B outdoor unit generally is not paired with an old R-410A coil. Whether existing refrigerant lines can be reused depends on their size, condition and the manufacturer's requirements. If your current R-410A system is working, it can still be serviced and repaired.

#### What can go wrong without a permit?

Unpermitted HVAC work can fail a later inspection, need to be redone, or raise questions during a home sale or insurance claim. Most problems are about safety, not paperwork.

- Gas furnace venting or gas connections that were never checked
- Undersized wiring or a missing disconnect at the outdoor unit
- A buyer's inspector or lender asking for permit records on newer equipment
- Having to open walls or redo work so an inspector can see it

#### How can you tell if past HVAC work was permitted?

Ask the seller or the contractor who did the work for the permit record. Many city permit offices can also look up permits by address, and some post a sticker or tag at the equipment.

Before you hire anyone for a replacement, a few plain questions save trouble later:

- Are you licensed for HVAC work in Arkansas, and are you insured?
- Will you pull the permit for this job, or am I expected to?
- Is the new indoor coil matched to the new outdoor unit and refrigerant?
- Will you size the system with a load calculation if my home has changed?
- Who schedules the inspection, and do I need to be home?

#### How does CASC handle HVAC replacement permits?

We pull the required permits on every HVAC replacement we install. You get a free estimate, Good, Better and Best options, and a plan that includes the permit.

Central Arkansas Service Company is licensed and certified, fully insured and bonded, and a Rheem Pro Partner. We run a Manual J load calculation when the job calls for it, not on every replacement. New installs carry a 10-year parts and 2-year labor warranty, with optional extended labor.

#### Frequently asked questions

Q: Do I need a permit to replace my AC with the same size unit?
A: Often yes. Many cities treat a like-for-like replacement as mechanical work that needs a permit and inspection. Maumelle's permit page lists HVAC replacements, for example. Check with your city building department, or ask your contractor who pulls it.

Q: Does a repair need a permit?
A: Most routine repairs, like replacing a capacitor, motor or flame sensor, do not. Rules differ by city, so if a repair grows into replacing major equipment, ask whether a permit applies.

Q: Who schedules the inspection?
A: Usually the contractor who pulled the permit. Your city may need someone home to let the inspector in. Ask your contractor what to expect for your address.

Q: Does CASC pull the permit for my new system?
A: Yes. CASC pulls the required permits as part of the job, so you do not have to handle that paperwork yourself.

Note: This guide is general, educational information, not legal advice. Permit and inspection requirements vary by city and county, and they change. Confirm current requirements with your local building department or the authority having jurisdiction before work begins.

### Permits for Water Heaters, Gas Lines and Sewer Lines

URL: https://centralarservice.com/learning-center/permits-water-heater-gas-sewer
Type: Learn guide (Permits & Code). Reviewed by Brandon Wilson, President, Central Arkansas Service Company. Updated October 14, 2026.

Replacing a water heater, running or changing a gas line, and repairing or replacing a sewer line commonly need a plumbing or fuel gas permit and an inspection in Central Arkansas cities. A licensed plumber usually pulls the permit. Requirements vary by city, so confirm with your local building department before work starts.

#### What is a plumbing or gas permit?

It is permission from your city to do plumbing or fuel gas work, followed by an inspection against the Arkansas Plumbing and Fuel Gas Codes. These jobs involve gas, pressure and wastewater, so they get a second look.

The Arkansas Department of Health's Plumbing and Natural Gas section licenses plumbers and gas fitters, certifies city plumbing inspectors, and supervises inspections for compliance with the state plumbing and fuel gas codes. In some areas, inspections are done by inspectors the Department of Health certifies for that area. Your city or the Department of Health can tell you who inspects your address.

Checklists vary by city, but plumbing and gas inspections generally focus on the same safety points:

- Water heaters: a working T&P valve with a discharge line that is not capped or blocked, proper venting on gas units, a gas shutoff and sediment trap, and support for the tank
- Gas piping: approved materials, tight fittings, shutoff valves at appliances, and a pressure test before the line goes into service
- Sewer lines: proper slope, approved pipe and fittings, cleanout access, and a sound connection before the trench is covered

#### When do these jobs need a permit?

Replacement and new installation are the usual triggers. Small repairs, like a faucet or a drain clog, usually are not. Rules vary by city.

- Water heaters: replacing a tank or tankless unit, or switching between the two. Inspectors commonly look at the T&P valve and its discharge line, venting, gas connection and an expansion tank where required.
- Gas lines: new lines, extensions to appliances, and relocating or replacing gas piping. Gas work is often pressure tested before it is put back in service.
- Sewer lines: repairing or replacing the line from the house to the city connection, especially when digging is involved.

#### Who handles these permits near you?

Your city permit office is the first call. Maumelle's permit page lists plumbing installations and replacements, and water heater replacement, among work that needs a permit.

Elsewhere in our service area, call city hall and ask for the building or permits office.

- Little Rock: the Building Codes Division issues plumbing permits and has a Plumbing/Gas Inspections section.
- North Little Rock: the Planning Department handles permits and has a chief plumbing inspector.
- Conway: Building Permits and Inspections processes permits and has a plumbing inspector on staff.
- Benton: Community Development handles building permits and applications.
- Bryant: Planning and Development lists separate plumbing and fuel gas trade permits.

#### What can go wrong without a permit?

Unpermitted plumbing and gas work can fail a later inspection, need to be dug up or redone, or raise questions during a sale or insurance claim. Safety is the bigger concern.

- A water heater with a blocked or missing T&P discharge line
- A gas fitting that leaks because it was never pressure tested
- A sewer repair that has to be uncovered so it can be inspected
- A buyer's inspector flagging a newer water heater with no permit record

#### How can you tell if past work was permitted, and what should you ask?

Ask the seller or the plumber who did the work for the permit record. Many city permit offices can look up permits by address. Before new work, ask a few plain questions.

A water heater label shows the install age, and a newer unit with no permit record is worth asking about. Sewer and gas line work is harder to see once it is covered, which is why inspection happens before the trench is closed or the wall goes back up.

- Are you a licensed plumber or gas fitter in Arkansas, and are you insured?
- Will you pull the permit, and who schedules the inspection?
- Does my water heater need an expansion tank or new venting under current local rules?
- Will the gas line be pressure tested before it is put back in service?
- For sewer work, will you run a camera first to see the problem before digging?

#### How does CASC handle plumbing and gas permits?

We pull the required permits on the plumbing and gas work we do. Water heater installs and sewer replacements come with a free estimate, so permits are part of the plan from the start.

Central Arkansas Service Company is licensed and certified, fully insured and bonded. We install Bradford White tank water heaters and Rinnai tankless water heaters, run and replace gas lines, and repair and replace sewer lines, with excavation when necessary.

#### What should you do next?

Planning a water heater replacement or sewer replacement? Start with a free estimate. Need a repair first? Book a repair visit.

#### Frequently asked questions

Q: Do I need a permit to replace a water heater?
A: In many Arkansas cities, yes. Maumelle's permit page lists water heater replacement, for example. Check with your city building department, or ask your plumber who pulls the permit.

Q: Does a gas line to a new appliance need a permit?
A: Gas piping work commonly needs a fuel gas permit and an inspection. Rules vary by city, so confirm with your local permit office before the line is run.

Q: Does sewer line repair need a permit?
A: Repairing or replacing a sewer line, especially when digging is involved, commonly needs a plumbing permit. Your city may also have rules about connecting to its sewer. Ask your permit office or your plumber.

Q: Does CASC pull plumbing and gas permits?
A: Yes. CASC pulls the required permits as part of the job, so you do not have to handle that paperwork yourself.

Note: This guide is general, educational information, not legal advice. Permit and inspection requirements vary by city and county, and they change. Confirm current requirements with your local building department or the authority having jurisdiction before work begins.

## Glossary

- A2L refrigerant: A2L is a safety class for refrigerants that are lower in toxicity and only mildly flammable. Newer refrigerants like R-454B fall into this class. Equipment built for A2L refrigerants includes safety features such as leak sensors, and installers follow updated handling and installation practices. The U.S. EPA's limits on higher-impact HFC refrigerants drove the shift to A2L systems. (https://centralarservice.com/learning-center/glossary#a2l-refrigerant)
- AFUE: AFUE, or Annual Fuel Utilization Efficiency, is the rating that shows how much of a gas furnace's fuel becomes usable heat in your home over a typical year. A furnace rated 95 percent AFUE turns about 95 cents of every fuel dollar into heat, with the rest leaving through the vent. Higher AFUE furnaces usually use sealed combustion and PVC venting. (https://centralarservice.com/learning-center/glossary#afue)
- air handler: An air handler is the indoor cabinet that moves air through your ductwork. It holds the blower motor, the evaporator coil and often electric heat strips, and it pairs with an outdoor heat pump or air conditioner in a split system. Homes with a gas furnace use the furnace as the air handler instead of a separate unit. (https://centralarservice.com/learning-center/glossary#air-handler)
- anode rod: An anode rod is a metal rod, usually magnesium or aluminum, that hangs inside a tank water heater. It corrodes on purpose so the steel tank lining does not. Once the rod is mostly eaten away, the tank itself starts to rust. Checking the anode rod during routine maintenance or a flush can help a tank water heater last longer. (https://centralarservice.com/learning-center/glossary#anode-rod)
- auxiliary heat: Auxiliary heat, often shown as AUX on a thermostat, is the backup heat a heat pump uses when it cannot keep up alone, usually on the coldest days or during defrost. In most homes it comes from electric heat strips in the air handler. Seeing AUX now and then is normal, but if it runs constantly, the heat pump may need service. (https://centralarservice.com/learning-center/glossary#auxiliary-heat)
- backflow preventer: A backflow preventer is a valve assembly that lets water flow into a building but not back out into the public water supply. It protects drinking water from contamination through cross-connections such as lawn irrigation systems, commercial kitchen equipment and fire sprinkler lines. Many water utilities require certain assemblies to be tested on a schedule by a certified tester. (https://centralarservice.com/learning-center/glossary#backflow-preventer)
- BTU: A BTU, or British thermal unit, is the amount of heat needed to raise one pound of water by one degree Fahrenheit. HVAC equipment is rated in BTUs per hour: a furnace by how much heat it delivers and an air conditioner by how much heat it removes. Twelve thousand BTUs per hour of cooling equals one ton. (https://centralarservice.com/learning-center/glossary#btu)
- cleanout: A cleanout is a capped access fitting on a drain or sewer line, often found outside near the foundation or in a crawlspace, garage or utility room. Plumbers remove the cap to run a drain snake, hydro-jetting hose or sewer camera into the line without pulling a toilet or cutting pipe. An easy-to-reach cleanout makes drain service simpler. (https://centralarservice.com/learning-center/glossary#cleanout)
- compressor: The compressor is the pump inside your outdoor air conditioner or heat pump that pressurizes refrigerant and moves it through the system. It is the heart of the cooling cycle and one of the most expensive parts to replace. Single-stage compressors run at one speed, while two-stage and variable-speed compressors can slow down for steadier comfort and humidity control. (https://centralarservice.com/learning-center/glossary#compressor)
- condenser: The condenser is the outdoor unit of a central air conditioner. Its coil and fan release the heat that refrigerant carried out of your home, and it houses the compressor. Keeping the condenser coil clean and clear of grass, leaves and shrubs helps it shed heat, which matters during long Arkansas summers. (https://centralarservice.com/learning-center/glossary#condenser)
- cross-connection: A cross-connection is any point where your drinking water piping links, or could link, to a source of contamination, such as a lawn irrigation system, a hose sitting in a bucket, or commercial equipment. If water pressure drops, contaminated water can be pulled backward into the supply. Backflow preventers and air gaps protect against this. (https://centralarservice.com/learning-center/glossary#cross-connection)
- descaling: Descaling is the process of flushing a tankless water heater's heat exchanger with a cleaning solution to dissolve mineral scale. Hard water leaves calcium and magnesium deposits that can reduce efficiency, restrict flow and trigger error codes. Manufacturers such as Rinnai list descaling as routine maintenance, and how often you need it depends on your water. (https://centralarservice.com/learning-center/glossary#descaling)
- dip tube: A dip tube is a plastic pipe inside a tank water heater that carries incoming cold water to the bottom of the tank, where it gets heated. If the dip tube cracks or breaks, cold water mixes with hot water near the top, so showers run lukewarm sooner than they should, and bits of plastic can show up in faucet screens. (https://centralarservice.com/learning-center/glossary#dip-tube)
- drain cleaning (snaking): Drain cleaning, often called snaking or cabling, uses a motorized cable with a cutting head to break up or pull out a clog in a sink, tub, toilet or main drain. It is a common first step for slow or backed-up drains. When grease, scale or roots keep coming back, plumbers may recommend a camera inspection or hydro-jetting. (https://centralarservice.com/learning-center/glossary#drain-cleaning)
- duct sealing: Duct sealing closes leaks at duct joints, seams and connections using mastic or approved foil tape. Leaky ducts in an attic or crawlspace can lose conditioned air and pull in hot, humid or dusty air. Sealing them can help rooms heat and cool more evenly and lets your HVAC system deliver more of the air it treats. (https://centralarservice.com/learning-center/glossary#duct-sealing)
- ductless mini-split: A ductless mini-split is a heat pump system with an outdoor unit connected by a small line set to one or more wall, ceiling or floor units inside. Each indoor head heats and cools its own zone without ductwork. Mini-splits are common for additions, garages, sunrooms, bonus rooms and older homes without ducts. (https://centralarservice.com/learning-center/glossary#ductless-mini-split)
- EPA Section 608: EPA Section 608 is the part of the federal Clean Air Act that governs refrigerant in stationary air conditioning and refrigeration equipment. It prohibits intentionally venting refrigerant during service, repair or disposal, and it requires technicians who maintain, service, repair or dispose of that equipment to hold EPA Section 608 certification. (https://centralarservice.com/learning-center/glossary#epa-section-608)
- evaporator coil: The evaporator coil is the indoor coil, usually sitting on top of the furnace or inside the air handler, where cold refrigerant absorbs heat and moisture from the air passing over it. The moisture drips into a condensate pan and drains away. A dirty or frozen evaporator coil cuts airflow and cooling. (https://centralarservice.com/learning-center/glossary#evaporator-coil)
- expansion tank: An expansion tank is a small tank, usually mounted on the cold water line near a water heater, that gives heated water room to expand. In homes with a closed plumbing system, such as one with a check valve or pressure-reducing valve, it helps keep pressure spikes from stressing the water heater, the T&P valve and fixtures. Local code may require one. (https://centralarservice.com/learning-center/glossary#expansion-tank)
- flame sensor: A flame sensor is a thin metal rod in a gas furnace that confirms the burners actually lit. If it does not sense a flame, the furnace shuts off the gas for safety. A dirty flame sensor is a common reason a furnace lights, runs for a few seconds and then shuts down, often repeating the cycle. (https://centralarservice.com/learning-center/glossary#flame-sensor)
- flow rate (GPM): Flow rate is how much hot water a tankless water heater can deliver at once, measured in gallons per minute, or GPM. The usable rate depends on how cold the incoming water is and how hot you want it. Sizing a tankless unit means adding up the fixtures likely to run at the same time, like two showers and a dishwasher. (https://centralarservice.com/learning-center/glossary#flow-rate)
- fresh-air ventilation (ERV): Fresh-air ventilation brings outdoor air into a home in a controlled way and sends stale indoor air out. An energy recovery ventilator, or ERV, transfers some heat and moisture between the two airstreams, so incoming air needs less heating or cooling. Ventilation can help tight, newer homes that trap cooking odors and stale air. (https://centralarservice.com/learning-center/glossary#fresh-air-ventilation)
- grease trap / interceptor: A grease trap or grease interceptor is a tank that catches fats, oils and grease from commercial kitchen drains before they reach the sewer. Grease cools, hardens and clogs lines if it gets through. Traps sit near sinks, while larger interceptors are often buried outside. Restaurants need them pumped and maintained on a regular schedule, and many sewer utilities set rules for them. (https://centralarservice.com/learning-center/glossary#grease-trap-interceptor)
- heat exchanger: A heat exchanger is the metal chamber in a gas furnace where burner flames heat the metal and the blower moves house air across the outside of it, keeping combustion gases separate from the air you breathe. Cracks or holes in a heat exchanger are a safety concern because they can let combustion gases escape, which is why technicians inspect it during service. (https://centralarservice.com/learning-center/glossary#heat-exchanger)
- heat pump: A heat pump is an all-electric system that cools your home in summer and heats it in winter by moving heat instead of burning fuel. A reversing valve switches the direction refrigerant flows. In mild Central Arkansas winters, heat pumps handle most heating on their own, with auxiliary heat strips or a gas furnace as backup. (https://centralarservice.com/learning-center/glossary#heat-pump)
- HSPF2: HSPF2, or Heating Seasonal Performance Factor 2, rates how efficiently a heat pump heats over a typical season. It replaced the older HSPF rating in 2023 with a test that better reflects real duct systems, so HSPF2 numbers look lower than old HSPF numbers for similar equipment. A higher HSPF2 means less electricity for the same heat. (https://centralarservice.com/learning-center/glossary#hspf2)
- hydro-jetting: Hydro-jetting cleans drain and sewer lines with a high-pressure water hose and a specialized nozzle that scours grease, scale, sludge and soft roots off the pipe walls. Plumbers usually run a camera first to check that the pipe is sound. It is common for restaurant drains and lines that keep clogging after snaking. (https://centralarservice.com/learning-center/glossary#hydro-jetting)
- indoor head: An indoor head is the indoor unit of a ductless mini-split system, usually mounted high on a wall, though ceiling and floor styles exist. Each head has its own fan, coil and remote or thermostat, so it heats and cools one room or zone. One outdoor unit can serve one head or several, depending on the model. (https://centralarservice.com/learning-center/glossary#indoor-head)
- leak detection: Leak detection is the process of finding a hidden water leak without tearing out walls or floors at random. Plumbers use tools like acoustic listening equipment, pressure testing, thermal imaging and moisture meters to narrow down where a supply line, drain or slab pipe is leaking. Signs include a rising water bill, warm floor spots or the sound of running water. (https://centralarservice.com/learning-center/glossary#leak-detection)
- line set: A line set is the pair of insulated copper refrigerant tubes that connect an outdoor unit to an indoor coil or ductless indoor head. One line carries refrigerant vapor and the other carries liquid. Line set length, size and condition matter during a replacement, and new refrigerants may require checking or replacing older lines. (https://centralarservice.com/learning-center/glossary#line-set)
- Manual J: Manual J is the Air Conditioning Contractors of America (ACCA) method for calculating how much heating and cooling a home needs, room by room. It accounts for square footage, insulation, windows, orientation, air leakage and local climate. A Manual J load calculation helps size new equipment correctly instead of guessing from the old unit's size. (https://centralarservice.com/learning-center/glossary#manual-j)
- MERV rating: MERV, or Minimum Efficiency Reporting Value, rates how well an HVAC air filter catches particles, on a scale from 1 to 16 for most residential filters. Higher numbers trap smaller particles like fine dust and pollen. Very high MERV filters can restrict airflow in systems not designed for them, so filter choice should match your equipment. (https://centralarservice.com/learning-center/glossary#merv-rating)
- permit / AHJ: A permit is permission from your local government to do regulated work, such as replacing HVAC equipment, a water heater, a gas line or a sewer line, followed by an inspection. The AHJ, or authority having jurisdiction, is the office that sets and enforces those requirements, usually your city building department. Requirements vary by city and change over time. (https://centralarservice.com/learning-center/glossary#permit-ahj)
- PRV (pressure-reducing valve): A pressure-reducing valve, or PRV, sits where the water line enters a home and lowers high street pressure to a safer level for pipes, fixtures and appliances. When a PRV wears out, you may notice banging pipes, running toilets, dripping faucets or a leaking T&P valve on the water heater. Adding a PRV can make a plumbing system closed, which often calls for an expansion tank. (https://centralarservice.com/learning-center/glossary#prv)
- R-410A: R-410A is the HFC refrigerant used in most home air conditioners and heat pumps installed from the mid-2000s until the recent transition. It replaced R-22. Under EPA limits on higher-impact HFCs, new equipment is moving to lower-impact refrigerants such as R-454B. Existing R-410A systems can still be serviced and repaired. (https://centralarservice.com/learning-center/glossary#r-410a)
- R-454B: R-454B is a newer refrigerant used in many current air conditioners and heat pumps, including systems from manufacturers such as Rheem. It has a much lower global warming potential than R-410A and is classed as A2L, meaning mildly flammable, so equipment includes added safety features. R-454B systems are not designed to be charged with R-410A, or the reverse. (https://centralarservice.com/learning-center/glossary#r-454b)
- refrigerant: Refrigerant is the fluid that carries heat in air conditioners, heat pumps and ductless systems. It absorbs heat indoors at the evaporator coil and releases it outdoors at the condenser, changing between liquid and vapor as it goes. A system that needs refrigerant added has a leak, and EPA rules govern how refrigerant is handled and recovered. (https://centralarservice.com/learning-center/glossary#refrigerant)
- relative humidity: Relative humidity is how much moisture the air holds compared with the most it could hold at that temperature, shown as a percentage. Many homes feel comfortable around 40 to 50 percent indoors. In humid Arkansas summers, high indoor humidity can make a home feel clammy even when the thermostat is reached, and it can encourage mold and musty odors. (https://centralarservice.com/learning-center/glossary#relative-humidity)
- return air: Return air is the air your HVAC system pulls back from the house through return grilles and ducts to be filtered, heated or cooled, and sent out again. Too few or undersized returns can starve the system of air, raise static pressure and leave some rooms, often upstairs bedrooms, hotter or colder than others. (https://centralarservice.com/learning-center/glossary#return-air)
- reversing valve: A reversing valve is the part in a heat pump that switches the direction refrigerant flows, so the system can move heat out of the house in summer and into the house in winter. It also reverses during defrost. A stuck reversing valve can leave a heat pump blowing cool air when it should be heating. (https://centralarservice.com/learning-center/glossary#reversing-valve)
- rooftop unit (RTU): A rooftop unit, or RTU, is a packaged heating and cooling system that sits on a commercial building's roof and holds the compressor, coils, blower and often gas heat in one cabinet. RTUs are common on offices, retail stores and restaurants. Regular maintenance covers filters, belts, coils, drains and economizers. (https://centralarservice.com/learning-center/glossary#rooftop-unit)
- RPZ valve: An RPZ, or reduced pressure zone assembly, is a type of backflow preventer used where the contamination risk is high, such as commercial kitchens, medical offices and irrigation systems with chemical injection. It has two check valves and a relief valve that discharges water if pressure drops. RPZ assemblies are commonly tested on a schedule by a certified tester. (https://centralarservice.com/learning-center/glossary#rpz-valve)
- sediment: Sediment is the sand, scale and mineral buildup that settles at the bottom of a tank water heater over time. It can cause rumbling or popping noises, slower recovery, less hot water and extra stress on the tank. Flushing the tank on a regular schedule removes much of the sediment before it hardens. (https://centralarservice.com/learning-center/glossary#sediment)
- SEER2: SEER2, or Seasonal Energy Efficiency Ratio 2, rates how efficiently an air conditioner or heat pump cools over a typical season. It replaced SEER in 2023 with a test that better reflects real ductwork, so SEER2 numbers run a little lower than old SEER numbers for similar equipment. Higher SEER2 means less electricity for the same cooling. (https://centralarservice.com/learning-center/glossary#seer2)
- service call fee: A service call fee covers a technician's trip to your home or business and the time spent diagnosing the problem. At Central Arkansas Service Company, it is $99 on weekdays and $149 on weekends and holidays, for both HVAC and plumbing. It is not waived or credited toward the repair, and there is no travel fee within the normal 50-mile service area. (https://centralarservice.com/learning-center/glossary#service-call-fee)
- sewer camera inspection: A sewer camera inspection runs a waterproof camera on a flexible cable through a drain or sewer line, usually from a cleanout, to show the inside of the pipe on a screen. It can reveal roots, cracks, sags, offset joints, grease buildup and blockages, and help a plumber locate the problem before recommending a repair. (https://centralarservice.com/learning-center/glossary#sewer-camera-inspection)
- short cycling: Short cycling is when an air conditioner, heat pump or furnace turns on and off much more often than normal, running only a few minutes at a time. Causes include oversized equipment, a dirty filter, low refrigerant, a faulty thermostat or a safety switch tripping. It wastes energy, wears parts and leaves humidity behind in summer. (https://centralarservice.com/learning-center/glossary#short-cycling)
- slab leak: A slab leak is a leak in a water or drain line running under or through a home's concrete slab foundation. Signs include warm spots on the floor, the sound of running water when fixtures are off, damp flooring, cracks or a sudden jump in the water bill. Leak detection pinpoints the spot before repair or rerouting. (https://centralarservice.com/learning-center/glossary#slab-leak)
- split system: A split system is a central heating and cooling setup with one part outside, the condenser or heat pump, and one part inside, the furnace or air handler with its evaporator coil. Copper refrigerant lines and wiring connect the two halves. It is the most common setup in Central Arkansas homes and in many small commercial buildings. (https://centralarservice.com/learning-center/glossary#split-system)
- static pressure: Static pressure is the resistance to airflow in your duct system, measured in inches of water column. Like blood pressure, too high is a warning sign. Undersized ducts, too few returns, closed vents and dirty filters or coils all raise it, which can reduce airflow, make rooms uneven and strain the blower motor. (https://centralarservice.com/learning-center/glossary#static-pressure)
- sump pump / sewage ejector: A sump pump moves groundwater out of a pit in a basement or crawlspace so it does not flood. A sewage ejector pump lifts wastewater from fixtures below the sewer line, like a basement bathroom, up to the main drain. Both rely on float switches and check valves, and both should be tested so they work when needed. (https://centralarservice.com/learning-center/glossary#sump-pump-sewage-ejector)
- T&P valve: A T&P valve, or temperature and pressure relief valve, is a safety valve on every tank water heater. It opens to release water if the temperature or pressure inside the tank gets too high. It connects to a discharge pipe that should run down toward the floor or a drain. A dripping T&P valve can point to high water pressure or a worn valve. (https://centralarservice.com/learning-center/glossary#tp-valve)
- tankless water heater: A tankless water heater heats water only when a hot tap opens, using a gas burner or electric element and a heat exchanger instead of a storage tank. It does not run out of hot water the way a tank can, but it has a maximum flow rate. Gas tankless units, such as Rinnai models, need proper venting, gas supply and periodic descaling. (https://centralarservice.com/learning-center/glossary#tankless-water-heater)
- thermostat: A thermostat is the wall control that tells your heating and cooling system when to run, based on the temperature you set. Programmable and smart thermostats can follow schedules, and heat pump thermostats also manage auxiliary heat. Dead batteries, wrong settings, loose wiring or a bad location can all cause comfort problems that look like equipment trouble. (https://centralarservice.com/learning-center/glossary#thermostat)
- tonnage: Tonnage is the cooling capacity of an air conditioner or heat pump. One ton equals 12,000 BTUs per hour of heat removed, so a 3-ton system removes 36,000 BTUs per hour. Most homes use systems between about 1.5 and 5 tons. The right tonnage comes from a load calculation, not square footage alone. (https://centralarservice.com/learning-center/glossary#tonnage)
- UV light (UV-C): A UV light for HVAC uses ultraviolet-C (UV-C) lamps installed near the evaporator coil or in the ductwork. The light is aimed at surfaces where mold and bacteria tend to grow, especially the damp indoor coil and drain pan. UV lamps lose strength over time and need periodic replacement to keep working as intended. (https://centralarservice.com/learning-center/glossary#uv-light)
- variable-speed: Variable-speed describes a compressor or blower motor that can adjust its output across a wide range instead of running only fully on or off. Variable-speed systems run longer at lower speeds, which can mean steadier temperatures, quieter operation and better humidity removal. They are often found in higher-tier air conditioners and heat pumps. (https://centralarservice.com/learning-center/glossary#variable-speed)
- water line: The water line, or water service line, is the pipe that carries drinking water from the meter to your home. Leaks can show up as soggy spots in the yard, low water pressure, a meter that spins with everything off, or a higher water bill. Water line repair or replacement often involves locating the leak and digging to the pipe. (https://centralarservice.com/learning-center/glossary#water-line)
- whole-home dehumidifier: A whole-home dehumidifier connects to your ductwork and removes extra moisture from the air throughout the house, separate from your air conditioner. It can help when the AC keeps a home cool but it still feels sticky, or in homes with damp crawlspaces. The collected water drains away, so there is no bucket to empty. (https://centralarservice.com/learning-center/glossary#whole-home-dehumidifier)

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