Filtrete 20x30x1 MPR 700 Air Filter, made by 3M, helps capture unwanted particles from your household air to contribute to a cleaner, fresher home environment. Designed with exclusive Filtrete 3-in-1 technology, including an MPR 700 and MERV 8 rating, your AC filter will help pull and capture countless particles – such as pollen and pet dander – while letting cleaner air flow through. Your Filtrete Filter will also capture large particles, including lint, dust mite debris, mold spores and household dust. Use these four 3-month pleated 1-inch home air filters in your furnace, air conditioner or HVAC system. For optimal performance of your heating and cooling system or HVAC system, change your furnace filter at least every 90 days. (1) Based on the 2022 Ipsos US Brand Health Study of Residential HVAC Air Filters.