636-978-5600 Emergency Service Available MAIN SITE NAVIGATION HOME REVIEWS VIDEOS PRODUCTS SERVICES SPECIAL OFFERS FINANCING ABOUT US Contact Us Now Request Service PROUDLY SERVING O'FALLON AND THE SURROUNDING COMMUNITIES SINCE 1985 Absolute Comfort Systems is dedicated to providing the best possible solution for your home or business. You can count on us to provide you with a system and solution that fits your unique needs and since we've installed many systems in this area, we've earned a reputation for doing the job right the first time. See What Our Customers Have to Say - 9 Reviews Sharon Andrews Baker - 07/07/2020 Super Dave came to the rescue and saved my husband and myself from this heat and treacherous humidity!!! We both have breathing issues and really appr... Leo Lawrence - 02/16/2020 Fast and excellent work vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv c Wags - 11/16/2018 Absolute Comfort Systems has gone above and beyond on every heating and cooling issue we have had, not only at our home but our business as well. Ext... View All Testimonials Write a Review OUR PRODUCTS As a Carrier dealer, with a wide variety of products to choose from, we can keep your family healthy and feeling comfortable all year long. We carry a complete line of indoor comfort equipment with innovations that raise the standards of comfort and reliability, including air conditioners, heat pumps, gas furnaces, programmable thermostats, humidifiers, air cleaners, ultra violet lights, ventilators and zoning products. Let the experts at Absolute Comfort Systems help you customize a solution that's right for you. Learn More OUR SERVICES We are service professionals! As licensed contractors and specialists in the field of heating and air-conditioning, we have the tools, the equipment, and the experience to keep your equipment running smoothly all year long. If it is after-hours service that you need, we are available to assist you! To help reduce service emergencies, we offer service agreements to keep your comfort system running at peak performance. Learn More WE'RE STOCKED WITH PRODUCTS BY THE BEST BRANDS Carrier Aprilaire Honeywell Arzel Water Furnace OUR ORGANIZATION OFFERS: Residential Heating & Air Conditioning Products Installation & Replacement New Installation/Construction Factory Trained & Certified Technicians Accepts: Visa, Mastercard, Amex & Discover On-Site Product Showroom Equipment Retrofit & Replacement Planned Maintenance Agreements Extended Service Agreements Free In-home Estimates On Replacement Equipment Family Owned and Operated Competitive Pricing Extended Warranties on New Equipment Financing Available Indoor Air Quality Specialists Service All Makes & Models Puron® Refrigerant Specialists PROMOTIONS Previous Next HOURS MON - FRI: 8A - 5P PAYMENT ACCEPTED Cash Check Credit Cards ABSOLUTE COMFORT SYSTEMS HOMEVIDEOSPRODUCTSSERVICESSPECIAL OFFERSFINANCINGABOUT USPRIVACY POLICYSITE MAPGLOSSARYREFUND POLICY 636-978-5600 office@absolute-comfortsystems.net We provide Heating, Cooling, Furnace & Air Conditioning Installation, Repair & Maintenance in O'Fallon, MO and the surrounding areas: Cottleville, MO | Dardenne Prairie, MO | Defiance, MO | Foristell, MO | Lake St. Louis, MO | O’Fallon, MO | St. Charles, MO | St. Paul, MO | St. Peters, MO | Wentzville, MO Absolute Comfort Systems — 1084 Cool Springs Industrial Dr., O'Fallon, MO 63366, USA REFUND POLICY: Once payment has been made no refunds are made available. Copyright © 2021 Select On Site, LLC Site design and code are property of Select On Site, LLC Product logos and images are the property of their respective manufacturers