Filtrete by 3M 20x20x1, MERV 12, Advanced Allergen Reduction HVAC Furnace Air Filter, 1500 MPR, 4 FiltersNot sure which Filtrete device or filter to buy? Click here to view our help guide. Your home should be your sanctuary, starting with the air you breathe. Filtrete Allergen, Bacteria & Virus Air Filters help capture unwanted particles from your household air, contributing to a cleaner, fresher home environment. By proactively capturing dust, bacteria, viruses and allergens, these high performance filters help improve your homes air quality. Includes Filtrete by 3M, 20x20x1, MERV 12, Advanced Allergen Reduction HVAC Furnace Air Filter, Captures Allergens, Bacteria, Viruses, 1500 MPR, 4 Filters.FILTER SIZE : 20 in x 20 in x 1 inOUTPERFORMS FIBERGLASS, WASHABLE AND NON-ELECTROSTATIC 3-month pleated 1 in. home air filters for your furnace, air conditioner or HVAC systemDESIGNED WITH EXCLUSIVE Filtrete Brand 3-in-1 technology from 3M to trap unwanted air particles while letting cleaner air flow throughATTRACTS AND CAPTURES microscopic particles such as smoke, cough and sneeze debris, bacteria and virusesand large particles, including lint, household dust and pollen1500 MPR has a rating of MERV 12The higher the MPR, the more microparticlessuch as pollen, pet dander, smoke, bacteria and virusesyour filter will capture from the air passing through it54% SMALL PARTICLE CAPTURE, like bacteria and particles that carry viruses* (* % captured is based on ASHRAE 52.2 testing for 0.3 to 1 micron particles from the air passing through the filter, which relates to HVAC industry standard efficiency testing)CERTIFIED as asthma & allergy friendly* (*As outlined in report ASCR: 1246-01)FIND YOUR SIZE: MPR 1000, MPR 1200 and MPR 1550 available in 4 in., 4 in. slim fit and 5 in. thick air filtersFOR OPTIMAL PERFORMANCE of your heating & cooling system or HVAC system, change your home air filter at least every 90 days for 1in. filters, and at least every 12 months for 4 in. and 5 in. filtersA dirty filter will slow down air flow and make the system work harder to keep you warm or coolwasting energy. Sign-up for a filter change reminder program (www.filtrete.com/ChangeReminders) that works for you!FOR RESIDENTIAL use onlyCREATE A CHANGE COUNTDOWN in the Filtrete Smart app. Simply use the app to scan the barcode on your filters packaging, then choose 30, 60 or 90 days for your replacement countdown. When the lifespan is up, youll get a notification to change your filter