About Us

• Weis Keil-Forness Comfort Systems is proud to provide Belleville, IL residents with exceptional heating and cooling services. Our HVAC contractors specialize in Air Conditioning Repair, AC replacement in Belleville, IL, as well as other critical in-home services, including Furnace Installation, Furnace Repair, Boiler Installation, Boiler Repair, and more. The heating and cooling technicians at Weis Keil-Forness Comfort Systems are highly trained and educated on the best practices to install, repair, and maintain heating and cooling systems such as furnaces, boilers, air conditioners, filtration, and air quality systems. Weis Keil-Forness Comfort Systems is the premier provider of in-home heating and cooling services because we have a proven track record of excellence. Since 1974, we have been raising the standard of what HVAC Servicing is, and we can bring our expertise and careful attention to detail to your home to either repair, install, or replace your aging heating or cooling system. If your home is in need of either heating or cooling solutions, you should trust that Weis Keil-Forness Comfort Systems will get the job done right the first time. Weis Keil-Forness Comfort Systems is dedicated to the excellent service we provide our customers, and we treat every Belleville home we enter as if it were our own. Weis Keil-Forness Comfort Systems provides AC Repair and Furnace Repair Services to residential and commercial clients all over the St. Clair County, IL 62226, Belleville, IL 62220, Fairview Heights, IL 62208, and O'Fallon, IL 62225, area.