Owned and Operated by the Sinn Family since 1987. (Kevin,Tim, Katie, and Pat)
Every company has its own personal history, but the history of Fresh Air Heating & Cooling is truly a textbook example of what it means to be family-owned and operated. How is that? Mike and Meg Sinn founded this company back in 1987, using their home office as their home base, appropriately enough. Thirty-plus years later, the company is still thriving. This all comes back to one fundamental fact that Mike and Meg knew to be true.
That fact? Happy customers lead to a successful business. We’ve grown through referrals and word of mouth about our excellence thanks to our relentless work ethic. Mike and Meg had a large family to raise—and us kids are now owners of the company!—so failure was never an option. We now own a building in the Chesterfield Valley, and we are proud to be a part of the community we serve.

Work with Our Qualified HVAC Technicians in Chesterfield, MO
When you need any HVAC or indoor air quality services, you need to know that you are working with technicians who you can trust. Not only are our technicians and installers NCI and NATE–certified, licensed, and OSHA trained, but we make it easy to work with them! We offer regular rate repair service from 7am–7pm, 7 days a week.
We also offer a one–year warranty on all repairs, and a 5–year labor warranty on new Carrier equipment installed. We’ve won the Angie’s List Super Service Award 10 years in a row, and we have an A rating with the BBB. We are also the recipient of the Carrier President’s Award.
We Give Back to the Community in More Ways Than One
Being a family-owned business means more to us than simply serving the heating and cooling needs of our neighbors. St. Louis is our home, and we believe being part of a community also means giving back to it.
One organization especially close to our hearts is Friends of Kids with Cancer. For every furnace, air conditioner, heat pump, and air handler we install, Fresh Air makes a donation to support children and families facing childhood cancer. Over the years, we’re proud to have donated more than $135,000 to this incredible organization.
We are also committed to supporting the fight against human trafficking through the Gateway Alliance Against Human Trafficking (GAHT). Fresh Air co-owner Katie Sinn has been involved with the organization for more than eight years and currently serves as Board President. GAHT works to strengthen the St. Louis region’s response to human trafficking through collaboration, education, advocacy, and support.
Our customers can help us grow our community of Fresh Air families, too. Through our Referral Program, customers can earn $25 for a service or maintenance referral or $100 for a referral that results in a new equipment installation.
For us, community involvement isn’t just something we do—it’s part of who we are. We’re grateful to have served the St. Louis area for decades, and we’re proud to continue finding meaningful ways to support the community that has supported our family and our business.