90
ExceptionalOFallon, Missouri · HVAC
HVAC contractors in OFallon, MO
9 HVAC contractors in OFallon, out of 9 HVAC and plumbing businesses the Registry lists there. Ranked by Registry Score, owner-confirmed records first.
- Pros
- 9
- Avg. score
- 63.9
- Scored
- 9
Summary
Data last updatedAs of October 14, 2026, the ProComfort Registry lists 9 HVAC contractors in OFallon, Missouri. Most-listed specialties: heating & furnaces (7), air conditioning (7). 9 have enough public signals for a Registry Score, averaging 63.9 out of 100; 4 score 70 or higher. Together they hold 2,041 public reviews on Google, Yelp and Facebook. The highest-scored is Swiss Air Heating & Cooling LLC, at 90 out of 100. 3 are Featured for 2026. View Swiss Air Heating & Cooling LLC.
Counts come straight from the Registry's records. How the Registry Score works
Featured HVAC contractors in OFallon
74
Strong52
EstablishedShowing 1–9 of 9
90
ExceptionalOFallon, MO 63366 4.9(919 reviews)
HVACHeatingA/C
80
Strong77
Strong74
StrongOFallon, MO 63366 4.4(128 reviews)
HVACHeatingA/C
57
EstablishedOFallon, MO 63366 4.3(4 reviews)
HVACHeatingA/C
52
Established50
Established49
Developing46
DevelopingHVAC contractors in OFallon: at a glance
- How many HVAC contractors are in OFallon, Missouri?
- As of October 14, 2026, the ProComfort Registry lists 9 HVAC contractors in OFallon, Missouri.
- Who is the highest-scored HVAC contractor in OFallon, Missouri?
- By Registry Score, Swiss Air Heating & Cooling LLC (OFallon, MO) ranks first at 90 out of 100, among 9 scored businesses averaging 63.9. 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 OFallon, Missouri for 2026?
- ProComfort Registry features Swiss Air Heating & Cooling LLC, Reliable Heating & Cooling Inc., Air Rescue. Featured companies are selected editorially from public reviews and track record; listings and rankings are never sold.
- How are HVAC contractors in OFallon, 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