3 Humidifier Filter Water Panel Pad for Aprilaire Humidifier Furnace fits Models 400, 400A, and 400M
Quick Overview Compare to Aprilaire Part # 45.
Fits furnace humidifier models 400, 400A, and 400M.
Filters minerals and pollutants from water before they are fed into the air, and helps control dust/dirt buildup inside humidifier.
For optimum performance replace twice a year at the start and end of the heating season.
Approx dimensions: 12.9 x 10.2 x 7.7 inches.