The Honeywell HC26E1003 AgION humidifier pad (water panel) for use with:
Honeywell HE225, HE220, HE150 and HE100 humidifiers.  

HC26E1003 water panel dimensions: 10" x 10" x 1-1/2" 
____________________________________________________________________________________________

The HC26E1003 humidifier pad is treated with an advanced antimicrobial coating that helps prevent the surface growth and migration of bacteria, mold, fungus and algae on the humidifier pad.  This is the pad of choice if you are looking for superior quality and performance in your Honeywell humidifier.  Proper humidification improves air quality, prevents dryness in your home and has many health benefits.

Dry air, soar throat, itchy nose? Is it time to replace your Honeywell humidifier pad?  A clean humidifier pad is one of the most important components of an effective and efficient humidification system.  So it is essential to make sure that you are changing your pad routinely.  During the humidification process the humidifier pad is coated with water.  Over time calcium deposits crystalize on the pad breaking down the pad and blocking air flow.  The time it takes for this to happen depends on your water condition and the run time of your humidifier.   It is important to monitor your pad condition throughout the humidification season for your home.  A good practice is to start with a new pad when you turn your humidifier on.  When the humidification season is over it is a good idea to clean out the humidifier including the frame, water distribution tray and drain.  Please remember not to throw any of the components away except the humidifier pad itself.   Then install a new pad so that you will be ready for the following season.  If you live in an area where you use your Honeywell humidifier year round or for very long periods a good rule of thumb is to replace the pad approximately every three months.  

Replacement: For the best performance we recommend that the pad be replaced at least once a year, usually prior to the start of the heating season.  If you have especially hard water or use your humidifier for extended periods of time (colder climates with extended heating seasons) it may be necesarry to replace the pad more often.  When the pad has reached its life cycle the coating will start to crumble off or excessive calcium deposits (usually due to hard water) will form.  It is important to avoid using pads in this condition as it can seriously inhibit the performance of your humidifier.

Humidifier Pad Installation Guide

By-pass Humidifier Operating Guide

Fan Powered Humidifier Operating Guide

TrueEASE Humidifier Operating Guide