If you find yourself reaching for yet another blanket on a winter night or sweating during a summer heatwave, it is time to call Calumet Cooling LLC. Our licensed technicians offer reliable heating, cooling, and indoor air quality solutions to homes in O’Fallon, St. Peters, and the Greater St. Charles County area. We specialize in helping you get the most out of your HVAC systems, so whether you are looking for AC repairs, furnace upgrades, or air purifier installations, our team has you—and your comfort—covered.