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St. Louis, Missouri · HVAC

HVAC contractors in St. Louis, MO

137 HVAC contractors in St. Louis, out of 142 HVAC and plumbing businesses the Registry lists there. Ranked by Registry Score, owner-confirmed records first.

Pros
137
Avg. score
53.6
Scored
114

Summary

Data last updated

As of October 14, 2026, the ProComfort Registry lists 137 HVAC contractors in St. Louis, Missouri. Most-listed specialties: heating & furnaces (99), air conditioning (96), commercial (16), ductwork & IAQ (4). 114 have enough public signals for a Registry Score, averaging 53.6 out of 100; 25 score 70 or higher. Together they hold 11,797 public reviews on Google, Yelp and Facebook. The highest-scored is SmartHouse Heating and Cooling, at 96 out of 100. 40 are Featured for 2026. View SmartHouse Heating and Cooling.

Counts come straight from the Registry's records. How the Registry Score works

Showing 1–20 of 137

HVAC contractors in St. Louis: at a glance

How many HVAC contractors are in St. Louis, Missouri?
As of October 14, 2026, the ProComfort Registry lists 137 HVAC contractors in St. Louis, Missouri.
Who is the highest-scored HVAC contractor in St. Louis, Missouri?
By Registry Score, SmartHouse Heating and Cooling (St. Louis, MO) ranks first at 96 out of 100, among 114 scored businesses averaging 53.6. The score combines public reviews (50 points), digital presence (30) and reach (20); nobody can pay for a higher score.
Which companies are featured in St. Louis, Missouri for 2026?
ProComfort Registry features SmartHouse Heating and Cooling, 1St Global Air Duct Cleaning, Averill Heating & Air Conditioning, Seliga Heating and Cooling, Swifty's Heating and Cooling, Welsch Heating & Cooling. Featured companies are selected editorially from public reviews and track record; listings and rankings are never sold.
How are HVAC contractors in St. Louis, Missouri ranked?
By Registry Score (0-100, from public reviews, digital presence and reach), with records confirmed by their owners listed first. The full method is at https://procomfortregistry.online/methodology.

What this list includes: heating, ventilation and air conditioning businesses (furnaces, heat pumps, A/C, climate control). Tags come from each business's public category and name, so a company can appear under several trades. HVAC contractors across the US