
Serving Durham, NH and surrounding areas
Approved
In business since 2000
Free estimates
Warranties offered
"Kevin was prompt, professional and knowledgeable. I would recommend him to anyone in need of HVAC work."





+2

*The Angi rating for Heating And Air Conditioning Service companies in Durham, NH is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.
*The HomeAdvisor rating for Heating And Air Conditioning Service companies in Durham, NH is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.
Last update on July 21, 2026

Serving Durham, NH and surrounding areas
Approved
In business since 2000
Free estimates
Warranties offered
"Kevin was prompt, professional and knowledgeable. I would recommend him to anyone in need of HVAC work."





+2

Serving Durham, NH and surrounding areas
Approved
In business since 2021
Free estimates
Emergency services offered
"Repairs were excellent and thorough "even well documented". The tech found units low on coolant. He identified and repaired multiple refrigerant leak points. I have dealt with many HVAC contractors over the years and Freedom Air Mechanical is one of the best. I highly recommend."





+36

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."





+2

Serving Durham, NH and surrounding areas
Approved
Free estimates
Emergency services offered
Warranties offered
"Absolutely top notch service and knowledge for the best price around Literally wouldn’t even consider calling another hvac company - thank you Keenan we look forward to the next time we need your services"





+56

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!"





+11

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

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.



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!"





+18
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."

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...."





+2
From average costs to expert advice, get all the answers you need to get your job done.

Get expert insights on radiant heating repair cost, including average prices, cost factors, and ways to save. Learn what impacts your radiant heating repair bill.

HVAC replacement costs depend on a lot of factors, like unit type, size, and labor. See what you can expect to pay for HVAC replacement here.

When your HVAC system is acting up, it could be the blower motor to blame. See how much blower motor replacement costs and what impacts the price here.

Retrofitting your house for AC is, surprisingly, not too hard. Here’s what you’ll need to consider to make it happen.

What is an air source heat pump, and is it right for you? Air source heat pumps are an effective and efficient home climate control solution. Read on for more information.

Your air conditioning unit is a lifesaver during those blisteringly hot summer months, but common air conditioning mistakes may be increasing your energy bill and decreasing overall efficiency. Read on to learn how to avoid them.