Hunter 30920 replacement air purifier filter fits models 30050, 30054, 30055, 30065, 30070, 30071, 30075, 30080, 30177, 30832, 30882, 30883, 37055, 37065 Fits Hunter air purifier models: 30050, 30054, 30055, 30065, 30070, 30071, 30075, 30080, 30177, 30832, 30882, 30883, 37055, 37065. 3-stage filter removes up to 99.97% of airborne particles as small as 0.3 microns in size including smoke, dust, pollen, pet hair and dander, mold spores and dust mites. Recommended to replace every 12 months for maximum efficiency, or more often depending on air quality & environmental factors. Approximate Dimensions: 13-1/2 x 10-1/2 x 3/4 inches. Hunter 30920 replacement air purifier filter. Fits Hunter air purifier models: 30050, 30054, 30055, 30065, 30070, 30071, 30075, 30080, 30177, 30832, 30882, 30883, 37055, 37065. 3-stage HEPAtech filter removes up to 99.97% of airborne particles as small as 0.3 microns in size including smoke, dust, pollen, pet hair and dander, mold spores and dust mites. Stage 1: Mesh particle screen pre-filter captures larger particles such as dust, lint and hair. Stage 2: Submicron primary filter is made out of a micro-filter material which removes particles as small as 0.3 microns in size. Stage 3: Activated charcoal filter removes household odors from cooking, cleaning, smoking and pets. Recommended to replace every 12 months for maximum efficiency, or more often depending on air quality & environmental factors. Package contains 1 replacement filter. Approximate Dimensions: 13-1/2 x 10-1/2 x 3/4 inches.