Professional Heating & Cooling

Serving St. Peters, MO

636-578-1777

Professional Heating & Cooling

HEATING & COOLING IN St. Peters MO

636-578-1777

SERVING ST CHARLES, ST LOUIS, LINCOLN, WARREN AND JEFFERSON COUNTY MO

Same-Day Service

Free Estimates

Family & Local

10 Year Warranty

Approved Contractor

Competitive Pricing

Same-Day Service

Free Estimates

Family & Local

10 Year Warranty

Approved Contractor

Competitive Pricing

Experienced HVAC Service

If you're looking for one of the top heating and cooling companies in St. Peters, MO, look no further than CNO Comfort Zone Heating and Cooling. We offer a comprehensive range of services to ensure your home stays comfortable year-round. On a hot day, you don’t want to be without your AC, and whether you need a repair or replacement, we’ll be there for you. In the winter, reliable heating and hot water are essential, and we provide same-day service to keep your home cozy.


Beyond heating and cooling, we also offer indoor air quality solutions, mini-split systems, boiler repair, and more!



Check out our services below! As one of the most respected heating and cooling companies in St. Peters, MO, we’re proud to deliver high-quality services to our valued customers.

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Fall Clean & Tune-Up Special

$79.00

$79 for your Fall Clean and Tune-Up.

From CNO Comfort Zone Heating and Cooling.

Use This Coupon

System Installation

$100 Off

Get $100 off a complete HVAC system installation ​from CNO Comfort Zone Heating and Cooling.

Use This Coupon

CNO Service Call

$25 Off

Must mention coupon when booking appointment.

From CNO Comfort Zone Heating and Cooling.

Use This Coupon

Satisfied Customer Reviews

Leave us a review about your excellence service today!

Contact Us For Service Today!

CNO Comfort Zone Heating and Cooling has been a trusted provider for the St. Peters community since 2014. We are dedicated to maintaining your comfort, offering services that include HVAC replacements, air conditioner repairs, and regular maintenance.


With more than 15 years of expertise, our expert technicians are prepared to address all your heating and cooling requirements. As a premier service provider in St. Peters, MO, we emphasize quality and efficiency, ensuring every job is completed correctly on the first attempt. Ensuring your home's comfort is our foremost concern.

636-578-1777
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