❄️ Official Rankings
10 Best HVAC in Frederick, MD (September 2026)
We compared 10 hvac serving Frederick and Frederick County, Maryland, and ranked the top providers by verified reviews, ratings, and local reputation — 8,068 customer reviews in all.
The 10 listed below hold an average rating of 5.0 out of 5, led by Smock Heating & Air. Updated for September 2026.
- HVAC ranked
- 10
- Average rating
- 5.0★
- Reviews analyzed
- 8,068
- Area codes
- 301, 240
⭐ 5.0 · 1746 reviews
1539 Tilco Dr Unit 104, Frederick, MD 21704
⭐ 5.0 · 960 reviews
8420 Gas House Pike DD, Frederick, MD 21701
⭐ 5.0 · 566 reviews
511 N Bentz St, Frederick, MD 21701
⭐ 5.0 · 409 reviews
300 E 4th St Unit A, Frederick, MD 21701
⭐ 5.0 · 145 reviews
5100 Buckeystown Pike Ste 250, Frederick, MD 21704
⭐ 5.0 · 140 reviews
15 N Court St, Frederick, MD 21701
⭐ 4.9 · 1680 reviews
4650 Wedgewood Blvd #102, Frederick, MD 21703
⭐ 4.9 · 571 reviews
5304C Kings Ct, Frederick, MD 21703
⭐ 4.8 · 1730 reviews
82A Wormans Mill Ct, Frederick, MD 21701
HVAC listed here serve Frederick, Frederick County, and nearby ZIP codes including 20678, 21701, 21702, 21703, 21704, 21705, 21709.