Mickala Gillispie
Josh was quick and efficient and fixed the issue before I could even check back after putting in a maintenance request. I would absolutely recommend this company!
Business ProfileHVAC Companies in Missoula, Montana
Design Air, Inc.
Design Air, Inc.
Design Air, Inc. provides HVAC service in the Missoula and Bitterroot valleys. Its product offerings include Bryant heating and cooling systems and ecobee smart thermostats.
Last Updated October 3, 2026.
Business Highlights
- Design Air says it is locally owned and operated.
- Design Air says it is a Bryant Factory Authorized Dealer.
- Design Air says its technicians are required to hold and maintain North American Technician Excellence (N.A.T.E.) certifications.
- Design Air offers a 12-month service guarantee covering parts and labor.
- Equipment Design Air installs has a lifetime workmanship guarantee and a 12-month installation labor warranty.
Service Area
Alberton, Bonner, Clinton, East Missoula, Florence, Frenchtown, Lolo, Missoula, Potomac and Stevensville, Montana.
Local Business Taking Calls
Design Air, Inc. is one of 5 HVAC companies ProsGrade lists in Missoula, Montana.
Taking Calls
Taking calls through ProsGrade
Listing details
11 services listed, including Gas furnaces, Heat pumps and Air conditioning. Open weekdays, closed on weekends. Rated 4.6 from 90 reviews.
- Verified listing details
- Service information
- Customer review signals
- Photo gallery
- Public contact information
- Published local profile
How This Business Compares
How Design Air, Inc. compares with the other 4 HVAC companies on ProsGrade in Missoula, using public Google ratings and review counts.
- Has more Google reviews (90) than 3 of the 4 other Missoula HVAC companies on ProsGrade.
Services Covered
11 services- Gas furnacesinstallation, maintenance and repair
- Heat pumpsinstallation, maintenance and repair
- Air conditioninginstallation, maintenance and repair
- Ductless systemsductless and mini-split systems
- Gas fireplaces
- Gas piping
- Indoor air quality productsair purifiers, UV light and filtration, humidifiers
- Ductwork sealingAeroseal
- HVAC new construction
- Remodeling
- Commercial heating and cooling
Reviews
What customers say
Recent customers describe quick fixes and helpful, professional technicians. One customer says a Saturday furnace outage was running again by noon; after the control board needed replacement, the household received a quote that day for a replacement board or a new furnace, then had its chosen gas furnace installed within a week. Another customer says the crew took time to get a heat-pump installation right, then checked a later equipment hiccup without charge while it remained under warranty.
Customer Reviews
Leland Earls
Fixed our minisplit system quickly and for a good price. Our tech Josh was helpful and amiable.
Shelley Hunter
Our furnace stopped working on a Saturday morning. Called the Emergency number and they were here by noon and had it up and running. Control Board was repaired but needed to be replaced. Liz gave us a quote that day for a new ControlBoard or new Furnace. We ended up buying a new gas furnace since ours was 16 years old. The new furnace was installed within a week. The installers were efficient and very polite. Thanks for your great customer service.
Kyle Trebotich
Long overdue review of Design Air. We've been a customer of theirs over two homes and most recently they installed a heat pump for us to work as an assist to the gas furnace during winter and ac in summer. It was a bit of a chore for them (not to their fault) to get this installed, the furnace was being a bit finicky. They spent a lot of time making sure it was right. Just today they came over to check on a hiccup on the equipment, turned out nothing was really wrong, but was not charged as still under warranty.
They're really friendly, professional, and skilled folks at Design Air. I'll continue to do business with them for everything heating and cooling.
Lynn Elsner
Called Design Air and appointment was scheduled within a week. Nate was prompt, professional and thorough and explained the cleaning and inspection process well. Reasonable cost for the service provided. Thank you for a great experience.
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Frequently Asked Questions
Does Design Air, Inc. offer emergency HVAC service?
It offers 24-hour, seven-day emergency service.
Is financing available for HVAC repairs or replacement?
Financing is available for HVAC repairs or replacement.
What happens during a Design Air maintenance visit?
The equipment is inspected and cleaned. If technicians find a problem, they can diagnose and resolve it.
How does Design Air size a new system?
Its home comfort team can perform an in-home load analysis, considering factors such as square footage, insulation, window configuration and duct sizing.