Filtrete 18x24x1, AC Furnace Air Filter, MPR 1000, Micro Allergen Defense, 2-Pack (exact dimensions 17.81 x 23.81 x 0.81)

A dirty filter will slow down air flow and make the system work harder to keep you warm or cool wasting energy.. filters. and 5 in. filters, and at least every 12 months for 4 in. FOR OPTIMAL PERFORMANCE of your heating & cooling system or HVAC system, change your home air filter at least every 90 days for 1 in. thick air filters. slim fit and 5in. FIND YOUR SIZE: 1000 MPR available in 4in., 4in. 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. 1000 MPR has a rating of MERV 11. ATTRACTS AND CAPTURES particles. home air filters for your furnace, air conditioner, or HVAC system. OUTPERFORMS FIBERGLASS, WASHABLE, AND NON-ELECTROSTATIC 3-month pleated 1 in