Just because you have pets, doesn't mean you have to live with pet odor. Homedics TotalClean PetPlus Replacement True Hepa Filter helps reduce odors associated with your furry friend, including litter boxes, wet dog smell, and other unpleasant household odors. Our True Hepa Filter removes up to 99.97% of airborne contaminants as small as 0.3 microns and features a built-in prefilter and PetPlus carbon odor filtration. Performance is best when the filter is replaced every 12 months. Includes 1 filter. Compatible with the Homedics True Hepa PetPlus Air Purifier, Ap-PET35.