Design Aire Heating & Cooling - St. Louis

Design Aire Heating & Cooling is a St. Louis–area HVAC firm with a family history dating back to 1904 that provides residential and commercial heating, cooling, and home-performance services including furnace and boiler repair, AC installation and maintenance, heat pumps, ductless and geothermal systems, architectural sheet metal for new construction, and planned maintenance agreements. Design Aire emphasizes long technical experience (service technicians average over 26 years), ongoing professional training, background-checked staff, and strong local credentials—serving multiple St. Louis area locations (Maryland Heights, St. Louis, O’Fallon) as the #1 Trane dealer in the Midwest and focusing on customer satisfaction, energy-efficiency solutions, financing/rebate assistance, and reliable, high-quality workmanship.