HVAC Contractor in St Peters, MO and Beyond
Same-Day Service Available | Family & Locally Owned | Competitive Pricing
Same-Day Service Available
Family & Locally Owned
Competitive Pricing
Why
CNO Comfort Zone Heating and Cooling Is the Choice for HVAC Services
Same-Day Service
Available
Free Estimates on Installations
Family and
Locally Owned
Up to 10 Year Labor Warranty
Approved Contractor for Spire and Ameren
Competitive
Pricing
The Experience and Expertise for Any HVAC Job
If you are searching for an HVAC contractor in St Peters, MO, then look no further than CNO Comfort Zone Heating and Cooling. We offer a wide range of services to better serve you and your home. On a hot day, you never want to be without your AC so whether you need a repair or a replacement, we will be there for you. In the winter, you also don’t want to be without heating or hot water. We offer same-day service so that you never have to worry about your home being overly hot or freezing cold. On top of our heating and cooling services, we also offer indoor air quality options, mini-split systems, boiler repair, and more!
Check out our services below! As one of the most respected heating and cooling companies St Peters, MO residents recommend, we’re proud to offer a wide range of high-quality services.
Call us for service at (636) 209-5087.
Air Conditioning 
As your HVAC contractor in St Peters, MO, we'll get cool air flowing through your home in no time. Our technicians will thoroughly troubleshoot your air-conditioning system before diagnosing the problem.

Heater/Furnace Services
Count on our dedicated technicians to go to great lengths to keep you warm and comfortable. Don't trust just anyone to handle your important heating installations or repairs.

Heat Pumps
Let our experts help you with your installation, maintenance and repair needs. When you choose us, you can be assured that your heat pump is being installed by a trained and certified HVAC contractor in St Peters, MO.
Boilers
If your boiler is not providing the heat you need for your home or business, then it is time to call our professionals. We offer a full array of boiler repair services including driveway heat. Get installation of new or repair of old systems.
Water Heaters
No matter what type of water heater you have, let our experts keep it maintained. Rely on our professionals to keep your home's access to hot water every day with repairs, rebuilds and new installations.
Indoor Air Quality
Your home’s air quality can have a big impact on your health. Contact us to have indoor air quality purification and whole-house humidifier systems installed, and enjoy better health and fresh, pure air!
Contact Us Today
CNO Comfort Zone Heating and Cooling has proudly served St. Peters residents and businesses since 2014. Our goal is to keep you living in your comfort zone, whether you need your HVAC system replaced, your air conditioner repaired, or need maintenance and upkeep.
With over 15 years of experience in the industry as one of the leading heating and cooling companies in St Peters, MO, our highly skilled technicians are trained to handle all your heating and cooling needs, ensuring the job is done correctly the first time. Your home comfort is our main priority.
Here's what our satisfied customers are saying...
Learn More About
CNO Comfort Zone Heating and Cooling
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