Bel-O Cooling & Heating Inc is O'Fallon's expert heating and cooling company. We offer furnace and air conditioning services in and around O'Fallon. Bel-O Cooling & Heating inc 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.