Ratings sourced from Google Business Profile · Last refreshed July 2026
Hvacs · O'Fallon, MO
O'Fallon's top-rated HVAC choice, with a stellar 4.9-star average from 931 reviews.
Listing data last updated May 11, 2026 · sourced from public Google Business Profile data
931 customer ratings on Google
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At 4.9★ from 931 ratings, Swiss Air Heating & Cooling rates about even with the 5.0★ average of the 6 nearest hvacs we track in O'Fallon.
Design Aire Heating and Cooling
103 Church St #20, O'Fallon, MO 63366, USA
One Hour Heating & Air Conditioning of O'Fallon
113 Triad Center W, O'Fallon, MO 63366, USA
KirbnJays Heating & Cooling
674 Whispering Willow Dr, O'Fallon, MO 63366, USA
No Problem Heating and Cooling
1565 Kisker Rd, St Peters, MO 63304, USA
Elite Heating and Cooling
108 Hamilton Industrial Ct, Wentzville, MO 63385, USA
Hoock's Heating & Cooling
4 Mulberry St, Foristell, MO 63348, USA