Filtrete 18x20x1 MPR 1085 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 1085 and MERV 11 rating, your AC filter will help pull and capture countless particles – such as particles such as pet dander, smoke and smog – while letting cleaner air flow through. Your Filtrete Filter will also capture large particles, including lint, pollen and household dust. Use a 3-month pleated 1-inch home air filter 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. The No. 1 Recommended HVAC Air Filter Brand (1), Filtrete’s Home Air Filters help capture particles both large and invisible, to create a cleaner, healthier home. (1) Based on the 2022 Ipsos US Brand Health Study of Residential HVAC Air Filters.