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Best HVAC companies in Boulder, CO

The highest-scoring HVAC company in and near Boulder is True Heating & Cooling (score 87, 5.0 stars from 2,348 Google reviews). 5 companies meet the 5 Star standard within 25 km.

Last updated Sep 25, 2026How we rank
  1. 1

    True Heating & Cooling

    5.0 · 2,348 Google reviewsWestminster, CO
    87SCORE
    (720) 637-5157 WebsiteFull profile
  2. 2

    Kappler Mechanical Heating & Air Conditioning

    4.9 · 1,473 Google reviewsBroomfield, CO
    81SCORE
    (720) 547-1498 WebsiteFull profile
  3. 3

    Precision Plumbing Heating Cooling Electric

    4.8 · 4,455 Google reviewsLouisville, CO
    78SCORE
    (720) 603-1309 WebsiteFull profile
  4. 4

    One Hour Heating & Air Conditioning® of Denver

    4.7 · 1,941 Google reviewsWestminster, CO
    73SCORE
    (303) 622-3401 WebsiteFull profile
  5. 5

    Daniel & Donna Plumbing Service, Inc - Broomfield, CO

    4.8 · 290 Google reviewsBroomfield, CO
    66SCORE
    (303) 907-3019 WebsiteFull profile

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

Compare the top 5

Top HVAC companies in Boulder by 5 Star Score
#CompanyScoreGoogle ratingReviewsYearsBased in
1True Heating & Cooling875.02,348–Westminster
2Kappler Mechanical Heating & Air Conditioning814.91,473–Broomfield
3Precision Plumbing Heating Cooling Electric784.84,455–Louisville
4One Hour Heating & Air Conditioning® of Denver734.71,941–Westminster
5Daniel & Donna Plumbing Service, Inc - Broomfield, CO664.8290–Broomfield

HVAC companies in Boulder: quick answers

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

True Heating & Cooling has the highest 5 Star Score among HVAC companies in and near Boulder: 87 out of 100, with a 5.0 star Google rating from 2,348 reviews.

How many 5 Star HVAC companies serve Boulder?

5 HVAC companies meet our standard within 25 km of Boulder: at least a 4.5 star rating, 20 or more reviews and a score of 60 or higher. The top 5 have 10,507 Google reviews between them, averaging 4.84 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.