HEPA-TYPE FILTER REPLACEMENT– This Homedics TotalClean PetPlus HEPA-Type Replacement Filter can help create a cleaner & healthier breathing experience; included is 1 AP-PET35FL replacement filter for Homedics TotalClean PetPlus AP-PET35 air purifier HELPS CAPTURE MICROSCOPIC AIRBORNE PARTICLES – Homedics HEPA-Type air filters help capture up to 99% of airborne particles as small as 0.3 microns; plus, the built-in prefilter and PetPlus carbon odor filter reduces odor from pets WORKS WITH HOMEDICS AIR PURIFIERS FOR HOME – Intended as a direct replacement filter for the Homedics TotalClean PetPlus 5-in-1 True HEPA Air Purifiers model AP-PET35; the 360-degree HEPA-type air filter is an odor eliminator for homes and reduces airborne allergens LONG LASTING FILTRATION - For optimal performance, replace every 12 months under normal usage conditions; vacuum the prefilter monthly using the brush attachment of your vacuum cleaner WHAT’S IN THE BOX - (1) Homedics TotalClean PetPlus HEPA-Type Air Purifier Filter Replacement