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

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