❄️ Official Rankings
10 Best HVAC in Frederick, MD (August 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 August 2026.
- HVAC ranked
- 10
- Average rating
- 5.0★
- Reviews analyzed
- 8,068
- Area codes
- 301, 240
Smock Heating & Air
⭐ 5.0 · 1746 reviews
1539 Tilco Dr Unit 104, Frederick, MD 21704
May's Heating & Air Conditioning
⭐ 5.0 · 960 reviews
8420 Gas House Pike DD, Frederick, MD 21701
Honest Air Heating & Air Conditioning
⭐ 5.0 · 566 reviews
511 N Bentz St, Frederick, MD 21701
BPM Heating, Cooling & Plumbing
⭐ 5.0 · 409 reviews
300 E 4th St Unit A, Frederick, MD 21701
Amerilogic
⭐ 5.0 · 145 reviews
5100 Buckeystown Pike Ste 250, Frederick, MD 21704
Johnson & Johnson Heating and Air Conditioning, Inc.
⭐ 5.0 · 140 reviews
15 N Court St, Frederick, MD 21701
Tuckers Air Conditioning, Heating & Plumbing
⭐ 4.9 · 1680 reviews
4650 Wedgewood Blvd #102, Frederick, MD 21703
Markool Heating Cooling Plumbing
⭐ 4.9 · 571 reviews
5304C Kings Ct, Frederick, MD 21703
TriState Home Services
⭐ 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.