You wouldn’t drive your car 100,000 miles withough changing the oil. The same logic holds true for your home comfort system. Regular HVAC preventative maintenance is the best way to ensure trouble-free operation and peak performance. Pre-season maintenance is also important. It can help to avoid a system failure in severe hot or cold weather when you need it most, and it can also keep your energy bill from getting out of control. I would like to somehow combine both furnace and a/c maintenance if possible, but if you don’t think that will work that’s okay.