❄️ Official Rankings
10 Best HVAC in Litchfield, NH (September 2026)
We compared 10 hvac serving Litchfield and Hillsborough County, New Hampshire, and ranked the top providers by verified reviews, ratings, and local reputation — 790 customer reviews in all.
The 10 listed below hold an average rating of 4.9 out of 5, led by Nelson Electric & Air. Updated for September 2026.
- HVAC ranked
- 10
- Average rating
- 4.9★
- Reviews analyzed
- 790
- Area code
- 603
⭐ 4.9 · 458 reviews
39 Rockingham Rd, Londonderry, NH 03053
⭐ 4.9 · 54 reviews
579 Daniel Webster Hwy Unit 1B, Merrimack, NH 03054
⭐ 4.9 · 50 reviews
461 Charles Bancroft Hwy Unit A, Litchfield, NH 03052
⭐ 5.0 · 29 reviews
11 Belmont Dr, Merrimack, NH 03054
⭐ 4.9 · 35 reviews
18 Dodge St, Nashua, NH 03064
⭐ 5.0 · 12 reviews
1502 Columbia Cir, Merrimack, NH 03054
⭐ 4.8 · 20 reviews
442 Charles Bancroft Hwy, Litchfield, NH 03052
HVAC listed here serve Litchfield, Hillsborough County, and nearby ZIP codes including 03052.