Filtrete 16X25X5 Ac Furnace Air Filter, Mpr, Actual Size 15.63 X 24.74 X 4.31 Filtrete 16x25x5 MPR 1000 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 1000 and MERV 11 rating, your AC filter will help pull and capture countless microparticles ? such as pet dander, smoke and smog ? while letting cleaner air flow through. Your Filtrete Filter will also capture large particles, including lint, pollen, mold spores and household dust. Use a 12-month pleated 5-inch home HVAC filter in your furnace, air conditioner or HVAC system. Two come in a pack, so keep one filter as backup, or use both in multiple areas. For optimal performance of your heating and cooling system or HVAC system, change your furnace filter at least every 12 months. (1) Based on the 2022 Ipsos US Brand Health Study of Residential HVAC Air Filters. Actual Filter Size: 15.75? x 24.75? x 4.375" This filter is compatible with Lennox furnaces calling for a 5 inch filter 1 Recommended Brand (Filtrete Brand is the most recommended brand of HVAC Air Filters based on the US Filtrete Brand Health Tracker, Ipsos, June 2022) 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 12 months for 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! CAPTURES MORE PARTICLES than fiberglass air filters