❄️ Official Rankings
10 Best HVAC in Dover, NH (August 2026)
We compared 10 hvac serving Dover and Strafford County, New Hampshire, and ranked the top providers by verified reviews, ratings, and local reputation — 3,220 customer reviews in all.
The 10 listed below hold an average rating of 4.9 out of 5, led by Maguire Brothers Plumbing and Heating - AC, LLC.. Updated for August 2026.
- HVAC ranked
- 10
- Average rating
- 4.9★
- Reviews analyzed
- 3,220
- Area code
- 603
East Coast HVAC & EC Electric
⭐ 4.9 · 1564 reviews
25 Central Ave, Dover, NH 03820
Service Experts Somersworth
⭐ 4.7 · 1097 reviews
30 Centre Rd #4, Somersworth, NH 03878
Martel Plumbing, Heating & Air Conditioning Inc
⭐ 4.7 · 56 reviews
59 Old Rochester Rd, Dover, NH 03820
HVAC in Dover — FAQs
How do I choose the best HVAC company in Dover, NH?+
Compare local companies on verified reviews, confirm they service your equipment — furnace, heat pump, or central air — and check they're licensed in New Hampshire. Top-rated options serving Dover include Maguire Brothers Plumbing and Heating - AC, LLC and Garrison City HVAC-R. Ask about emergency availability for a Seacoast winter.
Are heat pumps worth it in New Hampshire?+
Modern cold-climate heat pumps work well through New Hampshire winters and can lower heating and cooling costs, though many homes keep a backup heat source for the coldest stretches. A local HVAC company can assess your home and size the system correctly, which matters more than the brand.
How much does HVAC service or installation cost in Dover?+
Costs depend on whether you need a repair, a tune-up, or a full system replacement, plus your home's size, so Dover contractors quote after an assessment. For installations especially, get two or three quotes from top-rated local companies to compare.
Which HVAC companies are top-rated in Dover, NH?+
By verified reviews, highly rated HVAC providers serving Dover include Maguire Brothers Plumbing and Heating - AC, LLC, CircumVent LLC, and Garrison City HVAC-R. Dover is in Strafford County (area code 603).
HVAC listed here serve Dover, Strafford County, and nearby ZIP codes including 03216, 03231, 03265, 03820, 03821, 03822.