4.4 
184 *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 September 27, 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
"Very good. Louis the tech very nice. Good work"
+2
Serving Durham, NH and surrounding areas
Approved
Free estimates
Emergency services offered
Warranties offered
"Amazing service! very knowledgeable, clean work and super respectful! if you find yourself needing any help when it comes to your heating or Air Conditioning system, call Keenan without a doubt."
+56
Serving Durham, 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!"
+11
Serving Durham, NH and surrounding areas
Approved
In business since 2019
Free estimates
Emergency services offered
"Wonderful service from Adam! My water heater was struggling to keep up with my wife?s long showers - which by the way she heats them up hot as hell! ? Besides the point, Adam recommended sizing up the water heater in order to keep up with the demands of some crazy hot water. Incredibly fast installation process and Adam was really friendly. I would definitely recommend him to all my friends who are looking for a plumber. You should certainly give him a call!"
Serving Durham, NH and surrounding areas
Approved
Super Service Award Winner
In business since 2023
Free estimates
Credit card accepted
"done right and on time both AC and Furnace--pleasant person to work with and all at a reasonable cost--would recommend Jake highly. ED L"
Serving Durham, NH and surrounding areas
Approved
In business since 2008
Credit card accepted
Offers commercial services
"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 his crew were wonderful to work with! We had them clean our dryer vent. They were on time, friendly, and did. A great job. They were reasonable and I would highly recommend them."
Serving Durham, NH and surrounding areas
Approved
In business since 2015
Credit card accepted
Customers say: Quality work
"I would hire these guys again tomorrow; efficient, clean, professional, and provided appropriate guidance for our system. Great result!"
+2
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