A PERFECT FIT: This 16x25x1 replacement air filter fits your furnace, air conditioner, heat pump, or HVAC system (actual size: 19.50" x 19.50" x 0.75") for cleaner air. Features a MERV 14 rating and a high 1000 MPR to capture fine microparticles. MERV 14 with HEPA: Traps the following contaminants: pollen, pet dander, pollution, smoke, dust, and dust mite debris. The HEPA-Type filter protects your home, removing 95% of airborne particles WITHOUT impacting the air flow of a furnace or HVAC. HIGH MPR: The higher the MPR, the more microparticles - like pollen, pet dander, smoke, bacteria and viruses - your filter can trap and remove from the air passing through it. Our air filters have a 1000 MPR to capture more from the air.