to 3M dust, days, 1/2"x19 x dander, Air Size: lint, MPR in 60-90 1200 pollen, dust the 12 Fights Change Nominal: FPR 7 mites, AC Made and Micro spores, Defense Honeywell Filter frequency to smoke. Comparable pet 11 Allergen x 12x20x1, Plus Comparable 1, 20 USA. to Furnace 1000 Allergen Filtrete 1/2"x3/4" mold
