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Best HVAC companies in St. Louis, MO

The highest-scoring HVAC company in and near St. Louis is Classic Aire Care (score 95, 5.0 stars from 2,827 Google reviews). 2 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

    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 St. Louis qualify, they'll appear here automatically.

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HVAC companies in St. Louis: quick answers

Who is the highest-rated HVAC company in St. Louis, MO?

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

How many 5 Star HVAC companies serve St. Louis?

2 HVAC companies meet our standard within 25 km of St. Louis: at least a 4.5 star rating, 20 or more reviews and a score of 60 or higher. The top 2 have 3,331 Google reviews between them, averaging 4.95 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.