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TRUSTED BY MARS, PA HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon817
    Verified heating and air conditioning services reviews

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

Avatar for Home Mechanix
Home Mechanix
5.0(
61
)
Central A/C - Service or RepairThermostat - Repair or Reprogram

Serving Mars, PA and surrounding areas

Approved

In business since 2017

Free estimates

Warranties offered

"They were very responsive and reached out immediately to schedule an appointment that worked for my schedule. Arrived on time and cleaned, serviced, changed filters and showed me how to maintain our system during the year. I will call them again when we need HVAC service or repair."
New Furnace
New condenser unit
Boiler
Boiler
Response time6 hrs
11 neighbors recently requested a quote
Recommended by89%of homeowners
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 Mars, PA and surrounding areas

Approved

In business since 1988

Emergency services offered

Warranties offered

"My air conditioner stopped producing cold air Saturday evening, but I noticed so late that I had to wait until Sunday to try to get it fixed. I called the company I typically use for my HVAC and was told it would be $230 for them to even come to my house because it was a weekend. I completely understand a weekend being overtime, but I didn?t want to pay the additional fee so I told them I could wait until Monday to have it fixed. A technician was supposed to call me back to schedule a time for them to come on Monday, but they did not end up returning my call on Sunday. While I waited for the other company to call me back, I looked at Angie?s List to see if there were any highly-ranked companies I could use instead. John Mullen Home Repair was one of the companies I had planned to call Monday, but I noticed the hours said they were still open so I called at 6:00 PM on Sunday, fully expecting to schedule them to come Monday. John answered and said that he was on another job that he expected that to wrap up shortly and that he had another stop to make after that, but he thought he could get to my house around 7:00 PM. At this point it was about 85 degrees in my house with all the windows open, so I agreed to have him come out even if it meant an additional weekend charge. Around 6:45 PM I received a call from an employee of John?s saying he would be at my house in about 15 minutes. In talking to John, it seemed like he was going to be the one who came to my house, but I?m assuming he ended up sending someone else because he would have gotten to my house later than his estimated 7:00 PM. Having had to wait many hours for various service people to show up for their appointments, I was very impressed and pleased that they cared so much about meeting the appointment time. He showed up right around 7:00 PM and almost immediately diagnosed the issue as a blown capacitor. My air conditioner is fairly old and has actually blown a capacitor before, but the previous time it broke I used my typical HVAC company who charged me $250 for the capacitor on top of the labor and additional weekend charge (because of course it broke at the beginning of a 4-day holiday weekend where every day was in the 90s). The guy from John Mullen charged us $100 total for the capacitor and the labor. I was very pleased with that as well, so I mentioned that I?m probably going to replace my AC unit sometime in the next year and would be interested in using John Mullen. He said he noticed that the unit was older and that we could probably just run it until it dies, but explained a few of the newer units they have and the pricing for those. He wasn?t pushy at all and didn?t try to sell me on anything immediately, which I appreciated. To summarize, it took John Mullen Home Repair about 1.5 hours from the time I called them to the time they left my house after fixing my air conditioner, all for $100. I am very happy and would definitely recommend using them."
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Response time2 days
Response rate100%
4 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 Mars, PA and surrounding areas

Approved

In business since 1989

Free estimates

Emergency services offered

"The greatest company to have do your furnace. I would diffidently recommend them to other people. The price was very reasonable and the professionalism was without a doubt the best . There were no surprises when it came time for the final payment What ever they quoted that what you paid."
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 Mars, PA and surrounding areas

Approved (Corporate)

In business since 1975

Emergency services offered

Warranties offered

"I would highly recommend ARS - Pittsburgh to everyone who is in need of HVAC work!! From the moment I reached out to them to install was 2 business days, and then a couple days for a follow-up visit due to additional work needed which was unforeseen prior to my new boiler installation. Each and every employee (Bob, Chris, Jay and Tomas) were phenomenal. We will definitely be using ARS - Pittsburgh in the future for when we are ready to move forward with our ductless air conditioning needs."
System Installation
239 neighbors recently requested a quote
Recommended by80%of homeowners
Avatar for Bactronix Corp
Bactronix Corp
4.9(
507
)
Air Ducts & Vents - Clean

Serving Mars, 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
5 neighbors recently requested a quote
Recommended by80%of homeowners
Avatar for Kenders Heating and Air Conditioning LLC
Kenders Heating and Air Conditioning LLC
5.0(
21
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallHeat Pump - Install or Replace+11 more

Serving Mars, PA and surrounding areas

Approved

Super Service Award Winner

In business since 2022

Emergency services offered

Warranties offered

"Highly recommend Kenders HVAC! Both our furnace and air conditioner broke down at the same time, which was a huge stress, but the team at Kenders handled everything flawlessly. They showed up right on time, gave us a very reasonably priced quote, and managed the entire process from beginning to end in less than a week. Their team was professional, efficient, and left everything spotless. If you want honest, high-quality, and fast service, look no further than Kenders!""
Indoor unit
Heat pump
Elite Condenser
2- stage furnace
Response time11 hrs
7 neighbors recently requested a quote
Avatar for North Pittsburgh Heating & Cooling
North Pittsburgh Heating & Cooling
4.7(
252
)
Central A/C - Service or RepairGas Furnace / Forced Air Heating System - InstallGas Furnace / Forced Air Heating System - Repair+13 more

Serving Mars, PA and surrounding areas

Approved

Super Service Award Winner

In business since 1986

Free estimates

Emergency services offered

"Impressive! If you want the best value for the highest quality equipment, incredible responsiveness, and impeccable customer focused service , look no further. All of the (5) crew involved in our project were exceptionally professional. The complete residential HVAC replacement job was started within 2 days of reaching agreement and was done perfectly in only 2 days."
New apartment boilers
Apartment water heater installs
Attic A/C system
Boiler Install
Furnace install

+1

Response time6 hrs
4 neighbors recently requested a quote
Recommended by97%of homeowners
Above All Carpet and AirDuct Cleaning
4.6(
176
)
Air Ducts & Vents - Clean

Serving Mars, PA and surrounding areas

Approved

In business since 2017

Credit card accepted

Offers commercial services

"The phone rep (Angel) was terrific and professional. The cleaning visit left some things to be desired though. The workers left a mess behind--dirty fingerprints, dirt, and grime underneath and alongside the vents they cleaned, muddy/dirty water on the front porch, etc. They gave a hard sell to convince me to upgrade the cleaning services--bacterial treatment, allergen treatment, etc. They did not wear booties in the house or remove their shoes either--just tracked in dirt from outside all over our floors and carpets. The team did NOT have cameras to inspect the ductwork before and after the job or demonstrate its effectiveness. They used a WATER SPRAY to clean, which I had never heard of before--was expecting brushes and negative pressure/vacuums. I am not crazy about the idea of spraying water inside of my walls, ductwork, etc. and the EPA does not recommend it. The workers said that the ducts will take a few days to dry out. They charged me extra to clean out a couple of HVAC trunks in the house because they were not accessible directly from the vents--then when I asked how they accessed the trunks, they told me that they were able to reach them from the vents after all. Since they do not use cameras, I have no idea if they were actually cleaned, or how they were able to ascertain one way or the other if they reached them, or if they were successful in cleaning them. The price quoted over the phone was very reasonable. When they visited in person though, the up-charges put them right in line with competitors--double cold air returns, HVAC trunks, etc. In hindsight, I would have rather used a more professional and cleaner crew and spent another hundred bucks."
Response time6 hrs
Response rate93%
6 neighbors recently requested a quote
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Heating and Air Conditioning FAQs, answered by experts

As mentioned above, not all HVAC Schrader valves are necessarily the same. While the valve core and pin or spring size on Schrader valves used for HVAC are generally similar, the valves are not all universal and interchangeable. The size of Schrader valves varies depending on whether it's used in an air conditioner, bicycle tire, or motor vehicle tire.

If your HVAC system's capacity doesn't match the required CFM (Cubic Feet per Minute), imbalances can occur. An undersized system struggles to maintain desired temperatures, leading to discomfort. An oversized system might short-cycle, wasting energy and causing temperature fluctuations. Properly matching capacity to CFM ensures efficient and consistent heating, cooling, and home ventilation system performance.

While all portable AC units will collect moisture as part of their cooling and dehumidifying process, whether and how often you need to drain them depends on what kind of unit you have and the natural humidity levels where you live. For example, if you live in a very dry area and have a self-evaporating unit, you may not need to drain your portable AC very often at all. Some units may automatically drain collected moisture out the window through their exhaust vent.

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.

The Mars, 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.