❄️ Official Rankings
10 Best HVAC in Derry, NH (August 2026)
We compared 10 hvac serving Derry and Rockingham County, New Hampshire, and ranked the top providers by verified reviews, ratings, and local reputation — 5,529 customer reviews in all.
The 10 listed below hold an average rating of 4.9 out of 5, led by Southern New Hampshire Plumbing and Heating. Updated for August 2026.
- HVAC ranked
- 10
- Average rating
- 4.9★
- Reviews analyzed
- 5,529
- Area code
- 603
Southern New Hampshire Plumbing and Heating
⭐ 4.9 · 457 reviews
39 Rockingham Rd, Londonderry, NH 03053
Rob Roy Mechanical
⭐ 4.9 · 260 reviews
86 Nashua Rd #1279, Londonderry, NH 03053
Daigle Plumbing, Heating & Cooling
⭐ 4.8 · 953 reviews
11 Windham Rd, Derry, NH 03038
Derry Plumbing & Heating
⭐ 4.8 · 213 reviews
71 Birch St Ste A, Derry, NH 03038
Cornerstone IAQ Services LLC
⭐ 4.9 · 54 reviews
1 Corporate Park Dr Unit 14, Derry, NH 03038
Paul The Plumber
⭐ 4.7 · 3468 reviews
111 Franklin St Ext, Derry, NH 03038
Cal's Air Conditioning & Heating
⭐ 5.0 · 19 reviews
3 Rain Pond Pl, Derry, NH 03038
Tom's Mechanical Services llc
⭐ 5.0 · 12 reviews
37 Noyes Rd, Londonderry, NH 03053
HVAC in Derry — FAQs
How do I choose the best HVAC company in Derry, 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 Derry include Precision Heating & Gas Services and Cal's Air Conditioning & Heating. Ask about emergency availability for a Rockingham County winter.
How much does HVAC service or installation cost in Derry?+
Costs depend on whether you need a repair, a tune-up, or a full system replacement, plus your home's size, so Derry contractors quote after an assessment. For installations especially, get two or three quotes from top-rated local companies to compare.
Is a heat pump 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.
Which HVAC companies are top-rated in Derry, NH?+
By verified reviews, highly rated HVAC providers serving Derry include Precision Heating & Gas Services, Granite State Refrigeration Services LLC, Cal's Air Conditioning & Heating, and Tom's Mechanical Services LLC. Derry is in Rockingham County (area code 603).
HVAC listed here serve Derry, Rockingham County, and nearby ZIP codes including 03038, 03041, 03053.