Water Panel Evaporators are the heart of your humidifier and the component which generates the important humidity to keep you comfortable during the heating season. The water panel slides into the scale control insert and the water distribution tray sits across the top of the panel.

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2-Pack Original Factory Replacement Water Panel Evaporator for Aprilaire Humidifier Model 400 humidifier. The water panels for the 400 Series "drainless" humidifiers are different than the panels used in other flow-through humidifiers. Most water panels are made of a rigid expanded aluminum grid that is dipped in a clay solution. These pads are made of an expanded paper and as a result are able to hold more water than traditional pads. Unlike metal pads, these should be changed twice during the humidification season. Dimensions: 10 x 12-3/4 x 1-3/4 Click here for instructions on changing out your water panel

Water Panel (2-Pk.); Mfg. #: 45

Product Information:If yoursquo;re due to replace your water panel filter, therersquo;s no better way to do it than with a genuine Aprilaire 45 Water Panel Evaporator for Humidifier Model 400. This double pack of filters for Aprilaire humidifier model 400 will ensure that your water remains clean and free of pathogens that can cause sickness or discomfort.Pathogen Free, Beathable AirMost people do not realize that their water panel filter should be changed at least once, if not twice per year. By doing this, you ensure that the water in your breathable air remains clean and fresh instead of contaminated and possibly irritating. Aprilaire water panel filters are perfect for humidifiers that utilize well water or water drawn from some other type of underground source. Often times, this water can be less pure than regular filtered water. Alleviate your fears of contaminated moisture in the air by purchasing this Aprilaire 45 Water Panel Evaporator for Humidifier Model 400 (2 Pack).Protect Your Healh amp; Your HomeOptimum humidity levels within your home can help to ensure that you have a healthy respiratory system, and also aids in protecting areas in your home that can be damaged by dry weather (paint, weather stripping, rubber molding, etc.). It is easy to properly maintain your Aprilaire humidifier to ensure optimal performance.Maintaining Your Humidifier ProperlyProper maintenance of your Aprilaire Humidifier requires that you replace your Aprilaire 45 Water Panel annually when used regularly, and in cases of extreme use the water panel may need to be replaced as frequently as every six months. To replace your Aprilaire 45 Water Panel simply unsnap and remove the front panel of your humidifier, disconnect the plastic feed tube, remove the distribution tray, and then remove the water panel. Then simply insert your new Aprilaire 45 water panel and reassemble the parts of your humidifier.