Replacement Modular HEPA Filter for Air PurifiersHelps remove 99.97% of particles as small as 0.3 microns from passing through the filter. Captures unpleasant odors and common allergens. Maintains consistent high performance over time. Replacing the HEPA filter at least once a year is recommended. Filter Type: HEPA; Filtration Type: HEPA Filter; Filtration For: Dust;Dust Mite Debris;Mold Spores;Odors;Pet Dander;Pollen;Smoke.