This Holmes^® allergen remover is up to 99.97-percent efficient in removing allergens as small as 0.3 microns, such as pollen, dust, mold, pet dander and smoke from the air passing through the filter. It also helps fight common household odors with the power of Arm and Hammer^® baking soda. Features four speed settings and filter life monitor. Recommended for rooms up to 116-square-feet, smoke CADR 75. Replacement filters: one each of HAPF600 (HEPA) and HAPF60 (carbon).