Filtrete 20x22x1 Air Filter, MPR 1500 MERV 12, Allergen, Bacteria and Virus, 1 Filter

The higher the MPR, the more microparticles–such as pollen, pet dander, smoke, bacteria and viruses–your filter will capture from the air passing through it FOR OPTIMAL PERFORMANCE of your heating & cooling system or HVAC system, change your home air filter at least every 90 days for 1 inch filters, and at least every 12 months for 4 inch and 5 inch filters A dirty filter will slow down air flow and make the system work harder to keep you warm or cool–wasting energy. Sign-up for a filter change reminder program ( that works for you!