Air Purifier FiltersEnvion Therapure Replacement FilterContents1 Therapure Replacement Filter Tpp440f2 Therapure Tpp240 Replacement Filter3 Therapure Tpp220f Replacement Filter4 Therapure Tpp640s Replacement Filter5 Envion Allergy Pro Ap350 FilterTherapure Replacement Filter Tpp440fFilter-Monster True HEPA Replacement Compatible with Therapure TPP440F Filter for Therapure Air Purifier TPP440 Nispira True HEPA Replacement Compatible with Therapure Air Purifier TPP440. Compared to Part TPP440FTherapure Tpp240 Replacement FilterNispira True HEPA Replacement Compatible with Therapure Air Purifier TPP240. Compared to Part TPP240FFilter-Monster True HEPA Replacement Filter TPP240F for Therapure TPP240 Air PurifierTherapure Tpp220f Replacement Filterfits Therapure Envion tower air purifier models TPP220, TPP-220M, TPP 220H.Filter-Monster True HEPA Replacement Filter for Therapure TPP220M TPP220H Air Purifier Therapure Tpp640s Replacement FilterThis filter is engineered to fit Therapure Envion air purifier models TPP640, TPP540, TPP440Filter-Monster True HEPA Replacement Compatible with Therapure TPP640 FilterEnvion Allergy Pro Ap350 FilterLifeSupplyUSA Replacement HEPA Filter for Envion AllergyPro AP350 Air Purifier For more Replacement Filters and other Evion Products, visit Envion Website