Replacement Water Pad for Furnace Humidifier Water Panel. 2-Pack Original Factory Replacement Water Panel Evaporator for Aprilaire Humidifier Models 112, 224, 440, 445, 445A, 448

Dimensions: 11-1/2 x 14-3/4 x 1-1/2

Humidifier water panels (sometimes referred to as a filter) are a regular replacement item in whole-house humidifiers. For the best performance we recommend that the Water Panel be replaced once a year, either prior to the start or at the end of the heating season. If you have especially hard water - the panel can be replaced 2 times per year.