St. Charles HVAC

A well-functioning HVAC system is about more than just comfort. It can directly affect energy consumption and, therefore, your utility bills. A faulty HVAC system can lead to high energy usage, hitting your wallet hard. Our HVAC services in St. Charles ensure your system works optimally, reducing your energy costs.

Air Comfort Service, Inc. is an award-winning HVAC service provider in St. Charles, MO, committed to ensuring the comfort of your business or home. Our highly trained technicians deliver tailored solutions to meet your needs. We leverage our experience and the newest technological developments to provide high-quality results. Contact us to learn how we can help keep your HVAC in St. Charles in top-tier condition.

Services We Offer


Summers in St. Charles can be brutal, with temperatures hitting the 100s. At these times, you cannot afford to have your A/C not functioning correctly. With professional heating and cooling service in St. Charles, you can rest easily knowing your A/C will continue to run seamlessly. Plus, our technicians are available 24/7 in case of an emergency.


When you need reliable heating service in St. Charles, you can trust Air Comfort Service, Inc. We are here to ensure you stay warm and cozy through the colder months of the year, whether you need a furnace or heater repair or installation. With our decades of experience and our commitment to customer satisfaction, we'll make sure you’re safely heating your home.

Commercial HVAC Services

Commercial HVAC systems need as much care as residential ones. Air Comfort Service, Inc. understands this very well. For decades, we have been keeping businesses comfortable throughout the year with our HVAC services. Our expert technicians can maintain, repair and install and repair all types of HVAC systems. Plus, we are available 24/7, so you can rest easy knowing we've got you covered in an emergency.  Contact us for a custom service plan for your business needs.


Air Comfort Service, Inc. is the go-to company for residential heating and cooling in St. Charles. Our technicians offer comprehensive residential HVAC service, repair, maintenance, and installation services. We service all brands of HVAC equipment thanks to our expertly trained HVAC technicians.


Homeowners in St. Charles, MO, are always looking for ways to reduce their energy bills. One ideal way to do this is to ensure your home is insulated, especially your attic.  9 out of 10 homes are under insulated.  Contact Air Comfort Service, Inc. to learn more about our insulation services or to find out what the R-value of your attic insulation is. We'll answer all your questions and help you make your home more energy-efficient.

Indoor Air Quality

With rising pollution levels, and our area being notoriously bad for allergies, indoor air quality (IAQ) is a concern for many St. Charles residents. If you want to improve your indoor air quality (IAQ), our team of experts can help guide you through the process.  We offer air purifiers, humidifiers, dehumidifiers, UV lights, and Aeroseal duct sealing to help improve your IAQ.

Water Heaters

Water heaters are one of the hardest working appliances in any home. This means they need to be treated with care. We can install and repair most water heaters so you can go back to enjoying those hot showers.

Why Work With Us

24/7 availability in case of an emergency

Professional, courteous, and experienced technicians

Prompt and reliable service

Top-notch products

Upfront Pricing

A wide range of HVAC services to meet your needs

Contact Us Today!

At Air Comfort Service Inc., we understand the inconvenience of HVAC breakdowns, especially during extreme weather conditions. That's why we offer prompt and reliable HVAC repair services to ensure your comfort year-round. Our team of experienced technicians is skilled at efficiently diagnosing and fixing issues with all brands of heating and cooling equipment in St. Charles, ensuring minimal disruption to your comfort.

Contact us today to learn more about our installation and repair services for your HVAC in St. Charles.