Design Aire Heating and Cooling
Design Aire Heating and Cooling is a HVAC provider serving Ofallon, MO. Rated 5.0★ with 817 Google reviews. See services, review signals, and request a quote.
HVACOfallon, MO
On this page
Company overview
- TradeHVAC
- Service areaOfallon, MO
- Google rating5.0★ (817 reviews)
- Phone(636) 355-8437
- Address103 Church St #20, O'Fallon, MO 63366, USA
Photos
Photos from Design Aire, Jamie Robertson
What customers say
“Matt May was an excellent technician! This was our first experience with an all-electric HVAC system and heat pump, and he took the time to explain everything so clearly. He got our heat working and h…”
“Joe with Design Aire did a wonderful job replacing our old furnace with a newer version of the same model. He modified and updated ductwork with a filter housing and appropriate venting and gas supply…”
“We had an issue with a initial hook up of a central humidifier. the tech came out and found that a wire had been installed incorrectly and repaired it. They came out very quickly and completed the tas…”
“Josh came and serviced our furnace and humidifiers. He did a very thorough job making sure everything was working correctly. I have had Josh as a tech a few times. I love that I get the same tech. …”
“Just had another great experience with Design Aire. They help with all of our heating and a/c needs. We had to get a motor replaced, we called this morning and they had a technician here within a coup…”
Key highlights
Strengths
- Highly rated (5.0★ average)
- Large review volume (817 reviews)
Things to ask
- Confirm availability for your area and timeline
- Ask about warranty terms on parts and labor
- Request a written estimate before work begins
- Ask about payment plans or financing
Explore nearby research
Frequently Asked Questions
What services does Design Aire Heating and Cooling offer?
Design Aire Heating and Cooling provides: HVAC diagnosis, repairs, and full system installs. They serve residential and commercial customers in Ofallon, MO.
What is Design Aire Heating and Cooling's rating?
Design Aire Heating and Cooling has a 5.0 out of 5 star rating based on 817 Google reviews.
Is this company licensed in Missouri?
All listed providers have a verified Missouri contractor license at time of publication. You can verify on the Municipal licensing — no statewide Missouri HVAC license (each city regulates mechanical trades independently) lookup at https://ago.mo.gov/divisions/consumer/.
Does Design Aire Heating and Cooling offer emergency service?
Contact them directly to ask about emergency availability and after-hours service.
How do I request a quote?
Use the CTA below to submit your ZIP. You can message this company alongside two or three other local pros for easy comparison.
Licensing verified 2026-04-23. Reviews refreshed 2026-04-23.
Licensing data: Municipal licensing — no statewide Missouri HVAC license (each city regulates mechanical trades independently) · Company data: verified business records + Google Business profile
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