Revive Standard Replacement Filter Pack, Brondell, Mfr#: 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 are 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 and allergens larger than 0.3 microns, makes your air cleaner and fresher so you can breathe easier• The Active Carbon Filter has a honeycomb structure to ensure full coverage of granulated carbon throughout the filter to trap and remove odors, harmful gases, and VOCs• Only for Revive: the will only work with the Brondell O2+ Revive models PR50-W and PR50-B• Other available 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• Proud members of 1% for the Planet – Brondell donates 1% of annual sales to environmental nonprofits