Maintaining the right humidity level helps you create a healthy atmosphere in your home or office. The Equate PCWF813 Humidifier Filter Replacement comes with honeycomb filtration to trap mineral pollutants found in water so they don't enter the air. For high performance and maximum humidity output, use a new Replacement Humidifier Wicking Filter once every two months or at the beginning of each season, depending on use. Hard water reduces the lifespan of the honeycomb filter. Equate AC813 Humidifier Filters are built to fit several humidifier models including: Relion RCM-832, Relion RCM-832N and ProCare PCCM-832N. Keep your humidifier running smoothly and your air clear with this Replacement Humidifier Wicking Filter from Equate.