Aprilaire #45 Humidifier Water Panel - (2-Pack) The "heart" of your whole-house humidifier, the Water Panel (also known as humidifier filter, water pad, evaporator pad), should be changed at least once per heating season. Warm, dry air is forced through the wet pad to introduce water vapor into the home. The 45 panel is constructed of a paper material instead of aluminum to allow for proper operation in drainless, or "water saver" humidifiers. It should be changed at least 2 times per heating system.Product Features: Factory original OEM part Dimensions approximately - 10 x 12-3/4 x 1-3/4 Pad change instructions are printed on product carton Fits the Following Humidifiers: Aprilaire 400 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 45 Water Panel be replaced twice a year (or more if you have especially hard water). Click here for instructions on changing out your water panel
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