COMPATIBLE MODELS - 201 replacement filter,Nominal Measurements:20x25x6 inches,compatible with Aprilaire 2200, 2250, Space Gard 2200 Whole House Air Cleaner Purifiers and Lennox PMAC-20C SUPERIOR FILTRATION - MERV 10 201 Air Filter 20x25x6 inches size of this 201 Replacement Air Filter is constructed with multiple layers of collapsible fabric that maximises air filtration without compromising airflow, resulting in improved performance and energy efficiency, creating a more comfortable home environment MERV 10 AIR FILTER - The MERV 10 201 filter effectively traps dust, pollen, pet dander, household odours from cooking, smoking and cleaning products, and other airborne particles,resulting in cleaner and healthier air in your home COST EFFECTIVE - Package includes 201 replacement filter 2 pack. The installation process is simple and hassle-free,requiring no assembly or additional components such as cardboard or metal reinforcements COMPATIBLE MODELS - 201 replacement filter,Nominal Measurements:20x25x6 inches,compatible with Aprilaire 2200, 2250, Space Gard 2200 Whole House Air Cleaner Purifiers and Lennox PMAC-20C