Best HVAC companies in Frederick, CO

The highest-scoring HVAC company in and near Frederick is Kappler Mechanical Heating & Air Conditioning (score 88, 4.9 stars from 1,473 Google reviews). 24 companies meet the 5 Star standard within about 16 miles.

Last updated Nov 1, 2026How we rank
  1. 1

    Kappler Mechanical Heating & Air Conditioning

    4.9 · 1,473 Google reviewsBroomfield, CO25 years in business

    Kappler Mechanical Heating & Air Conditioning provides residential heating, cooling, indoor air quality, and electrical services from Broomfield, Colorado. Serving the area since 2001, the company handles HVAC system…

    88SCORE
  2. 2

    True Heating & Cooling

    5.0 · 2,348 Google reviewsWestminster, CO
    87SCORE
  3. 3

    Unique Heating and Air Conditioning Inc.

    4.9 · 847 Google reviewsNorthglenn, CO
    79SCORE
  4. 4

    VO Heating and Cooling

    5.0 · 305 Google reviewsThornton, CO
    79SCORE
  5. 5

    Precision Plumbing Heating Cooling Electric

    4.8 · 4,515 Google reviewsLouisville, CO
    78SCORE
  6. 6

    One Hour Heating & Air Conditioning® of Denver

    4.7 · 2,004 Google reviewsWestminster, CO
    72SCORE
  7. 7

    Impact Heating & Cooling Inc.

    4.9 · 949 Google reviewsThornton, CO
    72SCORE
  8. 8

    Smiley Air & Heat

    5.0 · 138 Google reviewsNorthglenn, CO
    72SCORE
  9. 9

    Cooper Heating & Cooling

    4.8 · 4,787 Google reviewsBroomfield, CO
    71SCORE
  10. 10

    Quality Heating and Air

    4.9 · 177 Google reviewsNorthglenn, CO
    71SCORE
  11. 11

    Blue Collar Heating and Air

    5.0 · 91 Google reviewsNorthglenn, CO
    71SCORE
  12. 12

    Unified HVAC Repair

    4.9 · 111 Google reviewsThornton, CO
    70SCORE
  13. 13

    Fix-it 24/7 Plumbing, Heating, Air & Electric

    4.7 · 774 Google reviewsBrighton, CO
    69SCORE
  14. 14

    Royal Services Plumbing, Heating, & Air

    4.9 · 506 Google reviewsThornton, CO
    69SCORE
  15. 15

    Jose & Sons Plumbing & HVAC

    4.9 · 154 Google reviewsBrighton, CO
    65SCORE
  16. 16

    Moore Family Plumbing & HVAC

    4.9 · 147 Google reviewsThornton, CO
    65SCORE
  17. 17

    Daniel & Donna Plumbing Service, Inc

    4.8 · 294 Google reviewsBroomfield, CO
    64SCORE
  18. 18

    All Climate Systems Heating & Cooling

    4.8 · 174 Google reviewsThornton, CO
    64SCORE
  19. 19

    Porter Family Heating & Cooling

    4.9 · 107 Google reviewsThornton, CO
    64SCORE
  20. 20

    Harmony HVAC Repair

    4.9 · 102 Google reviewsBrighton, CO
    64SCORE
  21. 21

    303 Heat

    5.0 · 224 Google reviewsNorthglenn, CO
    63SCORE
  22. 22

    To the T Plumbing Heating and Air

    4.8 · 577 Google reviewsThornton, CO
    62SCORE
  23. 23

    Goodfellas Heating, Cooling, Plumbing & Electric

    4.6 · 483 Google reviewsNorthglenn, CO
    62SCORE
  24. 24

    Marky Mark's Heating, Cooling & Plumbing Thornton

    4.8 · 234 Google reviewsThornton, CO
    62SCORE

We list only companies that clear our published bar, so this area is still filling in. As more HVAC companies near Frederick qualify, they'll appear here automatically.

Compare the top 10

Top HVAC companies in Frederick by 5 Star Score
#CompanyScoreGoogle ratingReviewsYearsBased in
1Kappler Mechanical Heating & Air Conditioning884.91,47325Broomfield
2True Heating & Cooling875.02,348–Westminster
3Unique Heating and Air Conditioning Inc.794.9847–Northglenn
4VO Heating and Cooling795.0305–Thornton
5Precision Plumbing Heating Cooling Electric784.84,515–Louisville
6One Hour Heating & Air Conditioning® of Denver724.72,004–Westminster
7Impact Heating & Cooling Inc.724.9949–Thornton
8Smiley Air & Heat725.0138–Northglenn
9Cooper Heating & Cooling714.84,787–Broomfield
10Quality Heating and Air714.9177–Northglenn

HVAC companies in Frederick: quick answers

Who is the highest-rated HVAC company in Frederick, CO?

Kappler Mechanical Heating & Air Conditioning has the highest 5 Star Score among HVAC companies in and near Frederick: 88 out of 100, with a 4.9 star Google rating from 1,473 reviews.

How many 5 Star HVAC companies serve Frederick?

24 HVAC companies meet our standard within about 16 miles of Frederick: at least a 4.5 star rating, 20 or more reviews and a score of 60 or higher. The top 24 have 21,521 Google reviews between them, averaging 4.87 stars.

How are these HVAC companies ranked?

By 5 Star Score: rating quality adjusted for review count (45 points), review volume (25), review recency (15), years in business (10) and license verification (5). Businesses cannot pay to change their score.

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Ratings and review counts come from each company's public Google listing and are re-checked monthly. 5 Star Home Service Pros is independent; companies cannot pay for placement.