Our 201 air filter replacement compatible with Aprilaire 2200 2250, Space Gard 2200 air Cleaner purifier, also compatible with Lennox PMAC-20C (Lennox X0445). MERV 10 air filter replacement. Efficient Filtration MERV 10 air filter replacement effectively helps decrease airborne particles such as pollen, pet dander, household dust, providing cleaner and fresher air for your home or office. Packing included: 2 x 201 Replacement Filter Warm Tips: It's recommended to replace every 6-12 months or more often depending on the usage and environment. Disclamer This is not an OEM product. The brand names and logos are the registered trademarks of their respective owners. Any use of the brand name or model designation for this product is made solely for purposes of demonstrating compatibility.