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Best HVAC companies in Clayton, MO

The highest-scoring HVAC company in and near Clayton is Classic Aire Care (score 95, 5.0 stars from 2,827 Google reviews). 3 companies meet the 5 Star standard within 25 km.

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

    Classic Aire Care

    5.0 · 2,827 Google reviewsArnold, MO100 years in business
    Free estimatesEmergency serviceFinancing available
    95SCORE
    (636) 220-5859 WebsiteFull profile
  2. 2

    Integrity Aire

    5.0 · 393 Google reviewsSt Charles, MO
    InsuredBondedFree estimatesEmergency service
    78SCORE
    (314) 803-3664 WebsiteFull profile
  3. 3

    SmartHouse Heating and Cooling

    4.9 · 504 Google reviewsSt. Louis, MO
    Emergency serviceFinancing available
    75SCORE
    (314) 451-5391 WebsiteFull profile

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

Compare the top 3

Top HVAC companies in Clayton by 5 Star Score
#CompanyScoreGoogle ratingReviewsYearsBased in
1Classic Aire Care955.02,827100Arnold
2Integrity Aire785.03930St Charles
3SmartHouse Heating and Cooling754.9504–St. Louis

HVAC companies in Clayton: quick answers

Who is the highest-rated HVAC company in Clayton, MO?

Classic Aire Care has the highest 5 Star Score among HVAC companies in and near Clayton: 95 out of 100, with a 5.0 star Google rating from 2,827 reviews.

How many 5 Star HVAC companies serve Clayton?

3 HVAC companies meet our standard within 25 km of Clayton: at least a 4.5 star rating, 20 or more reviews and a score of 60 or higher. The top 3 have 3,724 Google reviews between them, averaging 4.97 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.