Regularly changing HVAC filters is crucial for maintaining indoor air quality and the efficiency of the heating and cooling system. Clean filters prevent dust, allergens, and pollutants from circulating in the air, promoting a healthier living environment. Additionally, a clogged filter can cause the HVAC system to work harder, leading to increased energy consumption and potential system malfunctions. By staying on top of filter changes, homeowners can ensure optimal air quality, lower energy bills, and prolong the lifespan of their HVAC system.