PLUS Maintenance Agreement: Take the Next Step to Keep Your Furnace or Air Conditioner Running Well Prevent HVAC breakdowns with our PLUS Maintenance™ Agreement. We will schedule visits before peak energy usage periods to make sure your furnace or AC works smoothly all season. Pre-scheduled maintenance may save you energy and money, so skip the “what-if’s” and stay comfortable all year round with a D & K Heating Service Experts Heating & Air Conditioning PLUS Maintenance™ Agreement. We know you don’t want to wait one minute once something’s happened to your furnace or AC, and you don’t want repairs to cost a fortune. With a PLUS Maintenance™ plan, you will not only get our expert AC and furnace maintenance – you’ll also receive service and member benefits. Our service benefits were designed to keep you from waiting: PLUS Maintenance™ Agreements offer priority booking. Our member benefits were designed to keep your wallet thick. You’ll enjoy 15% off service, indoor air quality maintenance items, and no overtime service fees 24/7/365. We can’t think of a much nicer deal for a more affordable price. You’ll get all the PLUS Maintenance™ services and benefits for less than two individual tune-ups would cost. Call your D & K Heating Service Experts in Belleville at 613-707-2421 to enroll today, or conveniently schedule an appointment now.