The wizards of comfort since 1989
  • O’Fallon
  • St. Peters
  • St. Charles
  • Chesterfield
  • Wentzville
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HVAC Contractorin O’Fallon, MO

Are you looking for a trusted HVAC contractor in O’Fallon, MO? Look no further than Swiss Air Heating & Cooling, LLC, the wizards of comfort since 1989!

OUR FOUNDATION is built on strong guarantees, ensuring that our clients receive the best value with price and workmanship assurances. In an age where convenience is key, we’ve designed our services to be simple and easy – creating a one-stop shop for all your HVAC needs.

OUR SECRET to success lies in our team. We believe in continuous improvement, and that’s why we’re dedicated to training our employees to be the best in the industry. At Swiss Air Heating & Cooling, LLC, your comfort is our priority, and we’re here to make your experience the best it can be.

your #1 HVAC Contractorfor premium solutions

When you’re in need of an expert HVAC contractor, you can count on our highly trained team to deliver lasting solutions. From furnaces and boilers to heat pumps and AC systems, we specialize in providing efficient solutions to meet the heating and air conditioning needs of your home or business. Our HVAC technicians are always ready to address your heating and cooling issues

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top-notch hvac servicein o’fallon

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    Maintenance Agreement

  • USA Saving Agreement icon

    USA Saving Agreement

We’re more than just a company, we’re a maintenance partner. Our commitment goes beyond the services we offer. We proudly support the heroes of our nation with our USA Saving Agreement, offering veterans lifetime maintenance plans at no charge. We stand firmly behind our work and are here to serve those who’ve given so much to our country and community.

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Swiss air heating & coolingwhy choose us

With deep ties to the O’Fallon region, we really are the local, family-owned heating and air conditioning team your neighbors trust! We don’t just promise great service, either – we guarantee it! Standing behind our work with multiple guarantees, we mean it when we say we aren’t happy until you are. We’re also extremely proud to serve those who have supported and served our country and community, offering Veterans our USA Savings Club at no cost!

From our price and workmanship guarantees, our team stands behind our work because we’re proud of what we do. With Swiss Air Heating & Cooling, LLC, you’re always going to get high quality work, excellent customer service, and results that you’ll be happy with long after we leave your property.

If you’re in search of an HVAC contractor, Swiss Air Heating & Cooling, LLC is the ideal choice for your O’Fallon heating and cooling needs. Contact us today!

meet our team

  • Family owned & opperated
  • experts in our field
  • Financing
    financing options
  • 30+ years in the business
  • satisfaction guarantee
  • maintenance plan

Your Trusted HVAC Partnerin O’Fallon, MO

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    O’Fallon’s climate can really turn up the heat. That’s why it’s crucial to have our HVAC services to keep cool during the scorching summer months. Whether you require a new air conditioning unit installation or repairs for your current system, our seasoned technicians stand ready to help. Count on us for reliable HVAC solutions in O'Fallon's sizzling summer weather.

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    When the winter chill sets in, we provide top-notch heating services to keep you comfortable. Our technicians are well-versed in various heating systems, including, but not limited to, furnaces, heat pumps, and ductless mini-splits. Your comfort and energy efficiency are our top priorities, and we guarantee peak performance from your O’Fallon heating system.

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    Our services also encompass air duct cleaning, air purifier installations, and humidity control solutions. With cutting-edge technologies and our expertise, we effectively eliminate allergens, pollutants, and contaminants, creating a fresh and inviting living space for you and your home!


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Everything went great from the phone call, to the service they provided at my home. Came out within a few hours. The tech was very knowledgeable and very personable. Was honestly the best service I have ever had with a heating and cooling company and I wouldn’t hesitate to tell anybody to call Swiss! Thanks again!

-D. Hope

We have had several extraordinary experiences. ... Their technicians are always courteous, clean up after themselves and respectful. Their pricing is fair and every staff member has been pleasant and helpful. Would recommend them to anyone!

-K. Gilda-Fry
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