Product review (5 stars): Love the water panel!
These water panels are incredible. I only have to replace it once a year, and I run the humidifier on my furnace from November-March. It is made from some sort of metal, maybe aluminum. Not cheap paper, like the stand alone humidifier units use. A real bargain. I used to have a humidifier that sits on the floor and I would be buying the filters for it every 1-2 months.