D & K Heating Service Experts Heating & Air Conditioning in Belleville Introducing D & K Heating Service Experts Heating & Air Conditioning in Belleville. We’ve been servicing you and our Belleville community since 1985, and we’ve enlisted a nice roster of NATE-certified service technicians who have the knowledge and skills to service, repair and install all brands of furnaces, air conditioners, air handlers, inside air quality and related equipment. In fact, we have 19 technicians and 37 service trucks in the Belleville area alone. You know what that means? It means that you have our skilled professionals just minutes away, whether you’re in need of a furnace repair on the coldest day of the year or an AC replacement before summer arrives. Just think of D & K Heating Service Experts as your all-around HVAC company. We repair all makes and models of heating and cooling systems, and we sell them, too. It’s true, we do it all – residential service and maintenance, commercial HVAC services, indoor air quality. We even offer many home energy solutions so you can start lowering your heating and cooling expenses. Even better, all of our work is backed by our 100% Service Guarantee for 365 days. That’s what we like to call “Expert Service, Guaranteed.” Call D & K Heating Service Experts in Belleville at 613-707-2421 now to schedule an HVAC repair service, routine maintenance or to request a free estimate.