❄️ Official Rankings
10 Best HVAC in Keene, NH (September 2026)
We compared 10 hvac serving Keene and Cheshire County, New Hampshire, and ranked the top providers by verified reviews, ratings, and local reputation — 997 customer reviews in all.
The 10 listed below hold an average rating of 5.0 out of 5, led by Bergeron Mechanical Systems. Updated for September 2026.
- HVAC ranked
- 10
- Average rating
- 5.0★
- Reviews analyzed
- 997
- Area code
- 603
⭐ 5.0 · 560 reviews
216 Marlboro St Suite 3, Keene, NH 03431
⭐ 4.9 · 89 reviews
428 Main St Ste #8, Keene, NH 03431
⭐ 5.0 · 38 reviews
72 Water St, Marlborough, NH 03455
⭐ 4.8 · 65 reviews
639 Marlboro St, Keene, NH 03431
⭐ 5.0 · 20 reviews
160 Emerald St, Keene, NH 03431
⭐ 4.9 · 27 reviews
25 Roxbury St #116, Keene, NH 03431
⭐ 5.0 · 8 reviews
37 A Manchester St, Keene, NH 03431
HVAC in Keene — FAQs
How do I choose the best HVAC company in Keene, 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 Keene include Zajac HVAC LLC and Bergeron Mechanical Systems. Ask about emergency availability for a Cheshire County winter.
Do heat pumps work in New Hampshire?+
Yes — 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.
How much does HVAC service or installation cost in Keene?+
Costs depend on whether you need a repair, a tune-up, or a full system replacement, plus your home's size, so Keene 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 Keene, NH?+
By verified reviews, highly rated HVAC providers serving Keene include Zajac HVAC LLC and Bergeron Mechanical Systems, among other local providers ranked here. Keene is in Cheshire County (area code 603).
HVAC listed here serve Keene, Cheshire County, and nearby ZIP codes including 03431, 03435.