Design Aire Heating and Cooling

Design Aire Heating and Cooling has kept Missouri homes comfortable for more than a century, founding in the early 1900s and earning a spot as the regions premier Trane dealer. Operating from Maryland Heights, the family-owned business holds a near-perfect 4.9-star rating across 2,563 reviews and serves the greater St. Louis metro including St. Charles and O'Fallon. The company maintains extended hours seven days a week, a practical choice for homeowners facing the regions extreme summer heat and unpredictable winter cold.

What distinguishes Design Aire from larger HVAC companies is their personal approach despite century-old credentials. The business has earned the BBB Torch Award for ethical practices and the Trane Golden Compressor Award as the top Trane dealer in the Midwest. They offer whole-house humidifiers and in-duct air purifiers for indoor air quality concerns, plus they install both Trane and Mitsubishi ductless systems for homes lacking traditional ductwork. All installations include financing options through Wells Fargo, making new system purchases accessible.

Customer stories frequently name technician Joe, who installed a humidifier for PJ Fuller the day after calling and impressed with knowledge. Craig praised Brad and Joe for treating his home with care during a Trane system install, noting Joe walked through thermostat operation. For S Lieberman, Design Aire has handled annual maintenance for 25 years, replacing an AC system 11 years ago with their recommended model and keeping it running smoothly.