West County Heating and Cooling Specialist 


About Us




Fresh Air Heating and Air Conditioning has been serving both St. Charles and St. Louis Counties since 1947.  We have a reputation of excellence in our service, installations, and our products.  For 68 years,  we have provided indoor comfort solutions for our valued customers and beloved community.  With our 100 percent satisfaction guarantee, we prioritize your satisfaction and our workmanship.

Whether you require service or replacement for your home heating or cooling system, our NATE, NCI, and locally-certified technicians get the job done right—the first time. To remain the best in the HVAC industry, Fresh Air employees:

  • Answer the phone in person, 24/7
  • Ensure satisfaction through follow ups
  • Undergo rigorous training & continuing education
  • Hold the latest certifications in excellence & safety
  • Arrive on time and Respect your schedule
  • Guarantee 100% satisfaction


Started in Mike and Meg Sinn’s basement, Fresh Air has been in the customer service business.  Fresh Air grew through referrals and excellent service.  Once Fresh Air outgrew their home they moved the business to Chesterfield Valley off Spirit Dr.  The flood of 93′ took the business to Ellisville off Old State Rd.  This space was quickly out grown and they decided to head back to Chesterfield Valley, this time off Goddard.  Continuing to put customer service first they slowly added more technicians and more office staff.  It was time to move again, this time not very far, they moved to a building off Edison Ave.  The building on Edison housed Fresh Air for 7 years.  But soon the need for more warehouse and yard space created a new need.  As Chesterfield Valley began to bomb with new shopping malls Fresh Air built a new facility across from Rombach Farms.  The building is surrounded by other successful Chesterfield companies; Chesterfield Fence and Deck, and Paragon Restoration.

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