Air quality matters. Annual air filter replacements are a great way to keep your home and family protected. - Genuine Aprilaire Air Filter Replacement - Filters dust, pollen, and mold spores from the air entering your home. - Protects your family's respiratory health. - Helps maintain performance of heating and cooling systems. - Rated MERV 11 - Removes 92% of particles between 3.0 and 10.0 microns. - Replace Air Filter annually for best air quality. - Fits Aprilaire Model: 1410, 1610, 2410, 3410, 4400.