Curious About Furnace Filter Replacement? Here’s the Easiest Solution Timely furnace filter replacement is crucial if you want to keep the air in your home healthy and smelling fresh. Clean filters not only boost indoor air quality (IAQ) but also safeguard cooling and heating equipment and possibly reduce high energy... Curious About Furnace Filter Replacement? Here’s the Easiest Solution Timely furnace filter replacement is crucial if you want to keep the air in your home healthy and smelling fresh. Clean filters not only boost indoor air quality (IAQ) but also safeguard cooling and heating equipment and possibly reduce high energy...