Filterbuy 17x22x1 Air Filter MERV 8 Dust Defense (6-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 16.50 x 21.50 x 0.75 Inches)17x22x1 replacement air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 16. 50" x 21. 50" x 0. 75") 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 features an electrostatically charged design with 14 pleats per foot that captures more harmful particles and lasts 3x longer than