Revive Humidifier Filter, Pack of 3, Brondell, Mfr#: PRF-52

One year replacement filter pack: Three Humidity Filters for one year of use in the O2+ Revive are included. Specialty Filters and Standard Replacement Filters are NOT included (sold separately)• Evaporative humidification: Water particles used to humidify the room’s atmosphere are small and light-weight and can travel through the air more easily and efficiently, providing an even humidity throughout the room• Air purifier and humidifier: The Humidifier Filter and a Humidity Sensor work together to control the amount of moisture released based on the room’s temperature and humidity level. Operates similar to an air washer trapping dust and other air particles in the filter so they are taken out of the room’s atmosphere• Only for Revive: The Revive Humidifier Filter Pack will only work with the Brondell O2+ Revive models PR50-W and PR50-B• Other available Revive replacement filters: The Humidifier Filters (PRF-52) get changed after four months or as needed along with the Specialized Filters (PRF-58). The Standard Replacement Filter Pack (PRF-51) is changed every year• Proud members of 1% for the Planet – Brondell donates 1% of annual sales to environmental nonprofits