Aprilaire 313 Air Filter for Aprilaire Whole Home Air Purifiers, MERV 13 (Pack of 1) BUY WITH CONFIDENCE This genuine replacement air filter was designed and manufactured in the U.S.A. by Aprilaire - the leader in indoor air quality solutions, to optimize the performance of your Aprilaire Air Purifier Model: 1310, 2310, 3310, 4300 CREATE A HEALTHIER HOME by preventing airborne allergens from circulating through the air in your home by trapping common airborne allergens from the air as it passes through the MERV 13 filter including dust, pollen, mold spores, bacteria, pet dander, and dust mites BETTER PERFORMANCE thanks to the patented Aprilaire Self-Seal Technology which minimizes the amount of air bypassing the filter EASY AS 1-2-3 TO INSTALL in the unique Aprilaire Interlock Rail System. Unpack. Slide in. Close the door. Done. WORRY FREE We stand behind the performance of our air filters with our 10-year Clean-Coil Commitment