HQRP Hard Wick Water Filter compatible with GeneralAire 570 570M 570A Whole House Humidifiers; parts GA10, ReservePro 7900, BestAirPro A10-PR A10PR Replacement. Honeycomb filtration to trap mineral pollutants found in water and help prevent them from entering your home. This evaporator pad generates the humidity you need to keep your indoor air comfortable during the heating season. Please note, changing the panel slide the panel into the scale control insert with the colored marker up.