❄️ Official Rankings
10 Best HVAC in Watertown, MA (September 2026)
We compared 10 hvac serving Watertown and Middlesex County, Massachusetts, and ranked the top providers by verified reviews, ratings, and local reputation — 5,478 customer reviews in all.
The 10 listed below hold an average rating of 4.8 out of 5, led by Full Spectrum HVAC Service. Updated for September 2026.
- HVAC ranked
- 10
- Average rating
- 4.8★
- Reviews analyzed
- 5,478
- Area codes
- 617, 781
⭐ 4.8 · 2876 reviews
108 School St, Watertown, MA 02472
⭐ 4.8 · 1931 reviews
586 Pleasant St #4, Watertown, MA 02472
⭐ 4.8 · 172 reviews
53 Williams St, Waltham, MA 02453
⭐ 4.8 · 133 reviews
90b River St, Waltham, MA 02453
⭐ 4.8 · 99 reviews
34 Leonard St, Belmont, MA 02478
⭐ 4.9 · 28 reviews
15 Main St Ste 245, Watertown, MA 02472
⭐ 4.7 · 33 reviews
1053 Belmont St, Watertown, MA 02472
⭐ 4.8 · 19 reviews
284 Orchard St, Watertown, MA 02472
HVAC listed here serve Watertown, Middlesex County, and nearby ZIP codes including 02172, 02272, 02277, 02471, 02472, 02477.