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TRUSTED BY RENFREW, PA HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon169
    Verified heating and air conditioning services reviews

Top-Rated Heating and air conditioning pros in Renfrew - Updated Nov 2026

Mullen Heating and Air Conditioning
4.6(
205
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallBoiler or Radiator Heating System - Install or Replace+47 more

Serving Renfrew, PA and surrounding areas

Approved

In business since 1988

Emergency services offered

Warranties offered

"We came home from an outing on a Sunday night and found our air conditioner not working. I found John Mullen on Angie's list and liked the reviews. I contacted John and he asked me about my schedule on Monday. He fit us in on Monday morning. I wasn't home but my wife was. She said that John was so nice that she assumed that he was a friend of mine. I told her that I never met him before. He fixed the air conditioner and I am relieved that it didn't cost us a ton and we avoided 85 degree heat with an air conditioner. I would use John again. He was dependable, came out with in 12 hours of being called, and my wife does not always comment on how nice someone is unless it is absolutely true. Thumbs up for John Mullen, I have just found a go to guy for everything!"
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Response time2 days
Response rate100%
3 neighbors recently requested a quote
Avatar for Air Systems Mechanical Contracting, Inc.
Air Systems Mechanical Contracting, Inc.
4.6(
54
)
Gas Furnace / Forced Air Heating System - InstallCentral A/C - InstallBoiler or Radiator Heating System - Install or Replace+21 more

Serving Renfrew, PA and surrounding areas

Approved

In business since 1989

Free estimates

Emergency services offered

"A great company, from the estimate to the install they were on time, informative and very professional. I really think I could not have found a better group of professionals to replace my current heat pump and air handler. Kudos to this company, I highly recommend you give them a shot at your HVAC needs. If their service is as punctual and professional as they have been for the install, I'm not sure you could find a better fit. Thank you Air Systems Mechanical and please say thank you to your team of guys for me who installed my system, they were outstanding! I found my go too for all my HVAC needs."
Williamson Upflow Oil Furnace
18 SEER American Standard A/C
American Standard TAM4 Air Handler
Rheem Tankless Water Heater
Williamson Condensing Boiler Installation

+12

Response time11 hrs
Response rate86%
5 neighbors recently requested a quote
Avatar for ARS - Pittsburgh
ARS - Pittsburgh
4.5(
197
)
Gas Furnace / Forced Air Heating System - InstallCentral A/C - InstallCentral A/C - Service or Repair+5 more

Serving Renfrew, PA and surrounding areas

Approved (Corporate)

In business since 1975

Emergency services offered

Warranties offered

"ARS stands by their word! Customer satisfaction and a good quality of work is important to them. They will do whatever it takes to correct any customer or equipment issues. Mark is an amazing HVAC technician. He knows his stuff and has proven to be trustworthy in his heating/cooling system knowledge and repairs. When I had a recent burdensome furnace ignitor issue arise. ARS was as puzzled as I was. They assured me that they would do what it took to identify and troubleshoot the problem. They did just that!!! I thanks ARS for their loyalty to good and honest customer service!"
System Installation
215 neighbors recently requested a quote
Recommended by80%of homeowners
Avatar for Bactronix Corp
Bactronix Corp
4.9(
516
)
Air Ducts & Vents - Clean

Serving Renfrew, PA and surrounding areas

Approved

Super Service Award Winner

In business since 2011

Free estimates

Emergency services offered

"We hired Bactronix to clean the HVAC ducts in our house. Technicians Masson and Shawn arrived on time, did their work unobstrusively and efficiently, and answered all my questions politely and fully. They sent over before and after pictures of the ductwork by e-mail afterwards. Their work has made a positive difference to the air quality in the house, and we appreciate their services."
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+19

Response time1 day
7 neighbors recently requested a quote
Recommended by78%of homeowners
Avatar for Aire Serv of Sewickley
Aire Serv of Sewickley
4.8(
22
)
Air Ducts & Vents - CleanCentral A/C - Service or RepairGas Furnace / Forced Air Heating System - Repair+5 more

Serving Renfrew, PA and surrounding areas

Approved

In business since 2019

Free estimates

Credit card accepted

In the middle of July, when the thermometer is pushing past 100 degrees Fahrenheit, air conditioning isn't a luxury that's nice to have in Pittsburgh—it's an absolute necessity that you don't want to live without. It's obviously a disaster when your air conditioner grinds to a halt on the hottest day of the year. But it's also incredibly frustrating to deal with an AC unit that only "kind of" works and is struggling to get your house down to the temperature on your thermostat or control humidity levels. When you notice those types of annoying issues, it's necessary to get professional Pittsburgh air conditioner repair services before the problem worsens and you're left sweltering in an overheated house.

Gallery
39 neighbors recently requested a quote
Recommended by100%of homeowners
Kennihan Plumbing & Heating, Inc.
3.7(
227
)
Gas Boiler or Radiator Heating System - InstallCentral A/C - Service or RepairDuctless Mini-split Heating System - Install or Replace+15 more

Serving Renfrew, PA and surrounding areas

Approved

In business since 1969

Free estimates

Emergency services offered

"Of all the hvac we looked at be was the only one who knew about all options. His work was to notch and his results are the best we could have hoped for. Unique in the area for expertise Gerry was wonderful to work with and his recommendations spot on."
NEW SHOWER HEAD & FAUCET
NEW TILE
Ultra High Efficiency System
Furnace Replacement
Furnace Replacement

+2

Response time7 hrs
9 neighbors recently requested a quote
Recommended by84%of homeowners
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Heating and Air Conditioning FAQs, answered by experts

The top reason to purchase an HVAC maintenance contract is the fact that it ensures you are detecting problems before they turn into expensive fixes. Secondly, this type of contract provides priority service, which is nice if it’s peak busy season. Finally, an HVAC maintenance contract provides discounts on parts and labor for repairs, which can save you a good amount of money if your unit breaks.

If the air coming from your AC unit is cool but never quite cold, there are a few reasons this might be happening. For starters, it could signal that your refrigerant levels are low. If there are no other indications of this particular issue, like hissing noises or frozen refrigerant lines, anything from dirty filters to damaged condenser or evaporator coils could be responsible for the problem.

No. Evaporator coils are designed to work with specific refrigerant types, and they are rated by what kinds of refrigerant they use. It’s indicated with an “R” code. It’s important to match your evaporator coil and refrigerant or your system will not work properly. An AC technician can tell you what type of refrigerant your system needs and what evaporator coils will work with it.

The standard rule for return duct sizing is that the return vent should be the same size or larger than the supply vent. This will ensure balanced airflow in your home and reduce strain on your HVAC system.

A blockage in the ductwork may prevent air from flowing through the vent. If some rooms in your home are very hot or cold and another isn't, that can be a sign that a vent is blocked. Another sign of a blockage is a buildup of dirt or dust around the vent. In either case, a duct installer or cleaning service can investigate the issue for you and recommend a course of action.

The Renfrew, PA homeowners’ guide to heating and air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.