Filterbuy 20x20x5 Air Filter MERV 8 Dust Defense (2-Pack), Pleated HVAC AC Furnace Air Filters Replacement for Honeywell FC100A1011, Lennox X0585 & More (Actual Size: 19.63 x 19.88 x 4.38 Inches)20x20x5 replacement whole house air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 19. 63" x 19. 88" x 4. 38") MERV 8 synthetic media (comparable with MPR 600 & FPR 5) protects homes from mold, pollen, and more while trapping 90% of dust particles without impacting air flow High quality construction (made in the USA) features an electrostatically charged design with 8 pleats per foot that captures more harmful