Brondell Air Purifier Humidifier Replacement Filters For Revive - Humidifier Filter Pack Of 3, One-Year Set, Change Every 4 Mont

Humidifier Filter Pack (Pack Of 3): Three (3) Humidifier Filters One-Year Replacement Set (Change Every 4 Months Or As Needed)- Only For The O2+ Revive Pr50-W & Pr50-B O2+ Revive The Revive Is A Combination Air Purifier And Humidifier, Designed To Remove Pollutants And Add Moisture For Cleaner, More Comfortable Air. The Self-Regulating Evaporative Humidification Method Utilizes Small, Light-Weight Water Particles To Evenly Humidify The Room. The Revive Has Two True Hepa Filters, A Carbon Filter, A Specialized Filter, And A Humidifier Filter Which Operates Similar To An Air Washer Trapping Dust And Other Air Particles In The Filter So They Are Taken Out Of The Rooms Atmosphere. The Water Tank Holds 3.5 Liters Of Water For A Full Day Of Humidification, The True Hepa Filters And Carbon Filter Are Changed Every Year And The Specialized Filter And Humidifier Filter Get Changed After Four Months Or As Needed.