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TRUSTED BY DURHAM, NH HOMEOWNERS

  • Average homeowner rating star icon4.4
    Average homeowner rating
  • Verified reviews icon184
    Verified heating and air conditioning services reviews

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

Avatar for Everclean Air LLC
Everclean Air LLC
4.8(
44
)
Air Ducts & Vents - Clean

Serving Durham, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Emergency services offered

"I wanted to clean a second floor dryer vent hose that was loaded solid with lint. It was worse than I thought! Packed solid! It became evident that this was a messy and dangerous situation as it was a fire hazard. Through Angi I found Everclean and the co. was a perfect fit. HVAC companies don’t do dryer vents. Justin from Everclean was awesome and got the problem straightened out. He even discovered the dryer vent had become disconnected from outside dryer vent door! I can’t fit through the narrow attic hatchway as my shoulders are a bit too wide, so I depended on Justin. Finally, everything is buttoned up, and our clothes now dry in half the time. Cost was moderate and was money well invested. Dryer vent fire danger is now negligible compared to before. Along with neighbor hatred danger. I would hire Everclean again if needed again."
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+2

Response time7 hrs
Response rate100%
6 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 Durham, NH and surrounding areas

Approved

Super Service Award Winner

In business since 1932

Free estimates

Emergency services offered

"Palmer Gas & Oil just did an entire replacement of the 20-year-old central HVAC + humidifier + thermostats two-zone system in my home with a new state-of-the-art total system and I could not be more pleased. From start to finish each employee was personable, extremely knowledgeable, very courteous, and the consummate professional. There is truth to the adage that you get what you pay for and I know I got the best. All Gold Stars!"
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+11

1 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Soulios Heating & Cooling, LLC
Soulios Heating & Cooling, LLC
5.0(
17
)
Ductless Mini-split Heating System - Install or ReplaceGas Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install - For Business+14 more

Serving Durham, NH and surrounding areas

Approved

In business since 2019

Free estimates

Emergency services offered

Queen City HVAC LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business. \n

Response time3 hrs
1 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Pure Temp Heating and Cooling, LLC
Pure Temp Heating and Cooling, LLC
5.0(
18
)
Central A/C - InstallGas Furnace / Forced Air Heating System - Install

Serving Durham, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Credit card accepted

Pure Temp Heating and Cooling is Veteran Owned company dedicated to providing our customers with the best quality and craftsmanship. With over 12 years of experience in the industry ranging from residential, to commercial and light industrial, we are here to build relationships with our customers and communities and to provide our employees with a great place to work. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations.

New Installation
Steam Boiler
Response time8 hrs
Response rate88%
3 neighbors recently requested a quote
Avatar for Comfort Air Services
Comfort Air Services
4.3(
22
)
Gas Furnace / Forced Air Heating System - InstallCentral A/C - InstallDuctless Mini-split A/C - Install or Replace+10 more

Serving Durham, NH and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"Patrick called Friday night and showed up at 7:15 AM on a Saturday morning (OMG) to repair a central A/C system that was icing up inside. I'm still waiting to hear from the other 2 companies that were listed in my area. I know they will call Monday which would mean myself and my disabled wife would spend a very uncomfortable weekend and probably longer because most HVAC companies don't work weekends and it usually takes at least a day to schedule an appointment. Not fun when the humidity is 65% and the temp is close to 80. Patrick did a great job, A/C is running like new. Will hire him again and recommend him in a heart beat. Prices are very reasonable. Hire him!"
HVAC Jobs
HVAC Jobs
HVAC Jobs
HVAC Jobs
HVAC Jobs

+18

Response time2 days
Response rate89%
14 neighbors recently requested a quote
Wentworth Duct Cleaning, LLC
4.9(
53
)
Air Ducts & Vents - Clean

Serving Durham, NH and surrounding areas

Approved

In business since 2015

Free estimates

Customers say: True professional

"Gary and Tina went well beyond my expectations. From a detailed explanation of the job upfront including pricing and finding a break in the duct work after they began the job. They visited 3 times (about 3 hrs r/t each visit) waiting for a hvac company to repair the duct work so they could perform the work previously detailed. Very professional, meticulous in their work and the house was as clean when they left as when they arrived. I will without hesitation call on them to perform their service in the future."
Response time1 day
Response rate95%
2 neighbors recently requested a quote
Avatar for Cornerstone IAQ Services, LLC
Cornerstone IAQ Services, LLC
4.9(
72
)
Air Ducts & Vents - Clean

Serving Durham, NH and surrounding areas

Approved

In business since 2015

Credit card accepted

Customers say: Quality work

"Cornerstone IAQ is simply excellent. They arrived exactly (to the minute) as they said they would, showed me before and after duct pix, and offered sound advice on other related actions I could take. They are worth every dollar spent. I recommend them to anyone needing their HVAC ducts cleaned. Hats off to Mike and Jason...."
Before Picture Flex Ducting
After Picture Flex Duxting
Before Picture Flex  Ducting
After Picture Flex Ducting
After Picture Hard Ducting

+2

Response time1 day
Recommended by98%of homeowners
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Heating and Air Conditioning FAQs, answered by experts

The best time of year to purchase or replace an HVAC system, including components like an air conditioner or furnace, is during the off-season—spring and fall. During these periods, HVAC professionals are less busy than in summer and winter, when extreme temperatures create urgent demand. Shopping during the off-season can lead to savings of 10% to 15% on an AC unit and allows you more time to find the best deal and other cost-saving incentives. Typically, air conditioning units go on sale in the fall after demand drops, while furnace prices tend to decrease in the spring.

If your drain line is clogged, your AC might stop cooling, shut down, or refuse to turn on at all. Otherwise, you might see your AC leaking water, find standing water or water damage near the unit, or notice a musty smell coming out of your air conditioner or vents.

In some cases, yes, portable air conditioners are worth buying. They’re a relatively affordable option for cooling small spaces. (On average, they cost between $100 and $500 per unit.) Plus, they’re easy to set up, and you can move them around to cool various parts of your home as needed. However, they aren’t the most efficient AC option, and they tend to be noisy.

An HVAC system typically lasts between 10 and 30 years, with an average lifespan of 15 to 25 years. The longevity of the system is influenced by factors such as the quality of the unit, usage frequency, local climate, and how well it is maintained. Regular maintenance, including cleaning, filter replacements, and professional inspections, can help maximize its lifespan. Different components within the system have varying life expectancies. For example:

  • Furnaces: 15 to 30 years

  • Boilers: 20 to 35 years

  • Air Conditioners (AC units): 12 to 20 years

  • Heat Pumps: 10 to 20 years

  • Ductless Mini-Splits: 10 to 30 years

Turn your system off when you're toasty or when you're out to prevent unnecessary wear. Using the timer on your thermostat so that it switches off when it reaches a certain temperature or turns on just before you get back from work is best. An annual maintenance contract can be helpful to ensure your system receives these important services at regular intervals.

The Durham, 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.