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  1. Home
  2. Ofallon, MO
  3. Design Aire Heating and Cooling

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.

5.0★ (817 reviews)HVACOfallon, MO
On this page▾
  1. 1.Company overview
  2. 2.Photos
  3. 3.What customers say
  4. 4.Key highlights
  5. 5.Explore nearby research
  6. 6.Frequently asked questions

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

  • Design Aire Heating and Cooling photo 1
  • Design Aire Heating and Cooling photo 2
  • Design Aire Heating and Cooling photo 3
  • Design Aire Heating and Cooling photo 4
  • Design Aire Heating and Cooling photo 5

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…”

— lalatda, 2 months ago
★★★★★

“Joe with Design Aire did a wonderful job replacing our old furnace with a newer version of the same model.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…”

— Stanley White, a month ago
★★★★★

“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…”

— Nancy VanDenBosch, 2 months ago
★★★★★

“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. …”

— Bethany Huddleston, 4 months ago
★★★★★

“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…”

— Jodi Payne, 4 months ago

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

  • Ofallon, MO HVAC pros
  • Best HVAC in Ofallon
  • HVAC cost in Ofallon
  • Best HVAC in Kansas City, MO
  • Best HVAC in St. Louis, MO
  • Best HVAC in Springfield, MO
  • Best HVAC in Columbia, MO

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

See our editorial standards · Report inaccurate info about Design Aire Heating and Cooling

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