#1 Trane Dealer in Missouri. Design Aire is not only the largest residential Trane dealer in St. Louis and St. Charles – we are the largest in the entire state of Missouri. What does that mean to you? Design Aire has more training and experience with Trane systems than any dealer in the area. We also receive quantity discounts on Trane equipment, so you receive the premium equipment and expert installation at an affordable price. Design Aire received the 2012 BBB Torch Award for our "exceptional ethical business practices and customer service." We were also voted the "Best Heating and Cooling Company" by the St. Louis Post-Dispatch. Call 314 739-1600 to find out what makes Design Aire different.
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