Your HVAC system is the unsung hero of home comfort. It works tirelessly behind the scenes to keep you warm in the winter and cool in the summer. But like any complex machinery, it won’t last forever without a little TLC. Replacing a system can be a major hit to your wallet, so extending its lifespan is a smart investment. Here are five straightforward ways to keep your HVAC unit running smoothly for years to come: 1. Change Air Filters Regularly This is the single easiest—and most crucial—task for any homeowner. Clogged filters restrict airflow, forcing your system to work twice as hard to circulate air. Swap disposable filters every…