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.