Key Heating & Air Conditioning
Key Heating & Air Conditioning is a HVAC provider serving Dover, NH. Rated 4.8★ with 700 Google reviews. See services, review signals, and request a quote.
HVACDover, NH
On this page
Company overview
- TradeHVAC
- Service areaDover, NH
- Google rating4.8★ (700 reviews)
- Phone(833) 235-8811
- Address8 Continental Dr, Exeter, NH 03833, USA
Photos
Photos from Key Heating & Air Conditioning, Timothy Sombah
What customers say
“I can't express how happy I am with Key Heating and Cooling. We had them installed 2 mini-split units in our house. From beginning of the process to the end of the install, they made sure I was satisf…”
“THIS is the company to call when you need help! Our furnace was on the fritz over the weekend and wasn’t going to last much longer. A call to a different company Sat night, who advertised 24 hour serv…”
“Pete is great. Prompt, friendly, accurate. He explained all work to be done, reviewed before and after work. Answered all questions regarding maintenance and pipes. The best! On the membership plan no…”
“Michael was top-notch. Assessed our issue, explained things to me, made a quick fix, and ordered replacement parts for a more sustainable repair. I appreciate that Key was able to fit us into a canc…”
“We had a non- functioning furnace on December 23rd and our fuel company repair team ( not Key Heating) came out, diagnosed it very quickly and said they did not know how long it would take to “get the…”
Key highlights
Strengths
- Highly rated (4.8★ average)
- Large review volume (700 reviews)
Things to ask
- Confirm availability for your area and timeline
- Ask about warranty terms on parts and labor
- Request a written estimate before work begins
- Ask about payment plans or financing
Explore nearby research
Frequently Asked Questions
What services does Key Heating & Air Conditioning offer?
Key Heating & Air Conditioning provides: HVAC diagnosis, repairs, and full system installs. They serve residential and commercial customers in Dover, NH.
What is Key Heating & Air Conditioning's rating?
Key Heating & Air Conditioning has a 4.8 out of 5 star rating based on 700 Google reviews.
Is this company licensed in New Hampshire?
All listed providers have a verified New Hampshire contractor license at time of publication. You can verify on the New Hampshire Mechanical Licensing Board — State Fire Marshal's Office (gas fitters only; no statewide HVAC contractor license) — NEEDS-VERIFY lookup at https://www.nh.gov/safety/divisions/firesafety/licensing/mechanical-licensing.html.
Does Key Heating & Air Conditioning offer emergency service?
Contact them directly to ask about emergency availability and after-hours service.
How do I request a quote?
Use the CTA below to submit your ZIP. You can message this company alongside two or three other local pros for easy comparison.
Licensing verified 2026-04-23. Reviews refreshed 2026-04-23.
Licensing data: New Hampshire Mechanical Licensing Board — State Fire Marshal's Office (gas fitters only; no statewide HVAC contractor license) — NEEDS-VERIFY · Company data: verified business records + Google Business profile
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Request a quote from Key Heating & Air Conditioning
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