HVAC Contractor O'Fallon MO

When your heating or cooling system fails, it can disrupt your entire day, leaving you uncomfortable and out of sorts. At One Hour Heating & Air Conditioning, we understand the urgency of getting your HVAC system back up and running smoothly. That’s why we stand by our promise: “Always on time... or you don’t pay a dime!” Whether you’re dealing with an unexpected breakdown or simply need routine maintenance, we’re here to provide reliable, professional service you can count. We proudly serve residential and commercial customers in O'Fallon, MO and surrounding areas.

As a fully licensed and insured HVAC contractor, we pride ourselves on delivering top-tier service while ensuring peace of mind for our clients. We specialize in a wide range of services, from AC repair, maintenance, and installation, to ensuring the safety of your home with our expert dryer vent cleaning service. Our no-duct, no-vent solutions are perfect for homes or businesses looking for clean, efficient air circulation without invasive installation work. No matter the project, we handle everything from start to finish, ensuring that your system runs efficiently and safely year-round. One of the things that sets us apart is our Hero Program, designed to make regular HVAC maintenance affordable and hassle-free. For just $12.99 a month, you’ll receive ongoing maintenance services, helping to extend the life of your HVAC system, reduce energy costs, and prevent costly breakdowns. This program gives you the confidence that your system is always in peak condition, without breaking the bank.

Our goal at One Hour Heating & Air Conditioning is to keep your home or business comfortable, safe, and energy-efficient. Whether you need an emergency AC repair, want to install a new unit, or are interested in our Hero Program, we’re ready to help. Call us today to schedule your service in O'Fallon, MO, and experience why so many choose us for their heating and air conditioning needs!