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TRUSTED BY CONCORD, NH HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon90
    Verified heating and air conditioning services reviews

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

Avatar for Genove Oil & Air Co
Genove Oil & Air Co
4.7(
217
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallElectric Furnace / Forced Air Heating System - Install+47 more

Serving Concord, NH and surrounding areas

Approved

In business since 1977

Free estimates

Emergency services offered

"My neighbor and I share a furnace room. A couple of days ago, Kevin from Genove was doing her annual service and noticed that the boiler for my baseboard heating had a slow leak. He shut it off so that it wouldn't flood our basement and notified me of the problem, explaining it in detail so I could tell my oil company what was wrong when I called them for emergency service. Thanks to Kevin noticing a problem in equipment he wasn't servicing, we avoided major damage."
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+2

Response time12 hrs
Response rate100%
12 neighbors recently requested a quote
Avatar for Airco Home Comfort Services LLC
Airco Home Comfort Services LLC
4.7(
33
)
Gas Furnace / Forced Air Heating System - RepairBoiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For Business+46 more

Serving Concord, NH and surrounding areas

Approved

In business since 1998

Free estimates

Warranties offered

"I looked at a number of different options and they had the best pricing and they also specialize in just doing central air. So they were also sort of a plumber and gas fitter, anything like that, and so they really specialized in what I was looking for. So that is sort of their core business. They were good and they did a very nice, clean job. The house was built in 1901 and so they did a great job of removing the old radiators and radiant based heat systems and replacing it with a new central air set up."
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+4

Response time2 days
1 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Everclean Air LLC
Everclean Air LLC
4.8(
43
)
Air Ducts & Vents - Clean

Serving Concord, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Emergency services offered

"Everclear called near immediately upon my query through Angi. The technician came out within a few days, was very prompt on the scheduled appointment and took care of my dryer service. They were very reasonable in my opinion and would highly recommend them on all counts."
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+2

Response time7 hrs
Response rate100%
7 neighbors recently requested a quote
Avatar for Palmer Gas & Oil
Palmer Gas & Oil
4.6(
89
)
Ducts & Vents - Install or ReplaceBoiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For Business+47 more

Serving Concord, NH and surrounding areas

Approved

Super Service Award Winner

In business since 1932

Free estimates

Emergency services offered

"We have been a Palmer customer for 6 years. The front office and the technicians has always been great to work with. We have been using their AC and Heating Service Plan and on automatic oil and propane fill for years and we have never had an issue. My most recent experience was today for the AC Service Plan. The technician (David) was very polite, experienced, knowledgeable and respectful of our time and home. It’s always a great experience to have maintenance conducted in you home and have the technicians give you expert advice on your heating and AC system. Our AC system is well over 25 years old and still running strong thanks to Palmer. I continue to be impressed with Palmer and will remain a customer for the foreseeable future!"
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+11

1 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Revolution HVAC, LLC
Revolution HVAC, LLC
4.3(
22
)
Central A/C - InstallDuctless Mini-split A/C - Install or ReplaceDuctless Mini-split Heating System - Install or Replace+1 more

Serving Concord, NH and surrounding areas

Approved

In business since 1984

Free estimates

Emergency services offered

"Thank you Saul from Revolution. Saul was very accommodating with meeting us for a free estimate after hours so I didn't have to take time off work. He was also accommodating by completing the install on two new furnaces on my day off. I look forward to having ac units installed on the furnaces in the spring. I am very happy and would recommend Revolution HVAC to anyone looking for HVAC services. Saul showed up on time and it was a pleasure dealing with him. This is the second time I used Revolution for heating needs. A++++++ services."
Response time2 days
1 neighbors recently requested a quote
Recommended by93%of homeowners
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Heating and Air Conditioning FAQs, answered by experts

While an air conditioner can temporarily run with a dirty filter, it is not recommended as it will not work efficiently. A dirty filter forces the system to work harder to circulate cool air, leading to reduced airflow, increased wear and tear, and higher energy bills. This added strain can cause the air conditioner to overheat or fail prematurely. Furthermore, a clogged filter may allow dust and dirt to accumulate in your ductwork, negatively impacting air quality. It is more cost-effective to clean or replace filters regularly than to pay higher utility bills and risk needing to replace the entire AC unit.

To reduce AC startup power for a whole-house generator, install a soft start kit or hard start capacitor, which lowers the initial surge by gradually ramping up the compressor. Using a smart load manager can also help by staggering startup loads, preventing a system overload and future costly repairs.

Yes, a frozen AC unit can affect your indoor air quality since the reduced airflow won't be as effective at removing air pollutants, like dust and other allergens. Additionally, ice around the unit can create excess moisture, leading to mold and mildew that can damage your home if you don’t catch it early.

Yes, you can build a deck over your outdoor HVAC unit, but you need to leave at least 5 feet of vertical clearance above the unit. If you don’t want your deck to be that high off the ground, you could build a floating deck in another part of your yard—again, as long as you leave at least 4 feet of horizontal space between the deck and your AC unit.

The length of an AC cycle depends on the settings in your thermostat and the unit you have. Central AC doesn't constantly run at full blast the way that a window unit does. A cooling cycle in most homes is 15 to 20 minutes. Then, the unit stays off for seven to 10 minutes to circulate the cold air in the house before the cycle repeats. It should repeat two or three times per hour. A short cycle lasts less than 10 minutes and then turns off.

The Concord, NH 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.