Lennox Service & Repair from D & K Heating Service Experts Heating & Air Conditioning in Belleville Lennox has more than a hundred years of experience manufacturing some of the finest heating and air conditioning systems available. Your Grandma and Grandpa probably had Lennox equipment in their home—and in some cases the system may even still be there! If you have Lennox equipment maintaining your home comfort, you can trust D & K Heating Service Experts Heating & Air Conditioning in Belleville to provide factory-authorized professional service and repair. We are a licensed, highly qualified, nationally certified heating and air conditioning contractor, with the skills and training to keep your Lennox HVAC equipment running in top form. And with utility costs that are bottom dollar. Call D & K Heating Service Experts in Belleville today at 613-707-2421 for a Precision Tune-Up. That’s what we call our routine maintenance service available to assure reliable, energy-efficient operation of your Lennox furnace or AC system. Or, if your Lennox heating and cooling equipment should ever need repair, contact us anytime, we’re always available.