Brondell Air Purifier Replacement Filters for Revive - 1 yr. Standard Filter Pack - 2 True HEPA Filters, 1 Active Carbon Filter - Filters Dust, Smoke, and More. PRF-51

ONE YEAR REPLACEMENT FILTER PACK: The Active Carbon Filter and both True HEPA Filters needed for one year of use in the O2+ Revive is included. Specialty Filters and Humidifier Filters NOT included (sold separately),TRUE HEPA FILTERS: Moving air through dual True HEPA filters, that remove 99.97% of particulates larger than 0.3 microns, makes your air cleaner and fresher so you can breathe easier.,ACTIVE CARBON FILER: The Active Carbon Filter has a honeycomb structure to ensure full coverage of granulated carbon throughout the filter to help remove odors, and harmful gases.,ONLY FOR REVIVE: The Revive Standard Replacement Filter Pack will only work with the Brondell O2+ Revive models PR50-W and PR50-B.,REVIVE REPLACEMENT FILTERS: The True HEPA filters and Active Carbon filter are changed every year while the Specialized Filter (PRF-58) and Humidifier Filter (PRF-52) get changed after four months or as needed. Specialized Filters and Humidifier Filters sold separately.