Product review (3 stars): So So.
I have been buying water panels for my Aprilaire for years. I don't like the humidifier setup in our house and it really doesn't feel like its working. I can't say if its the water panel or what. The hard water clogs the water panel so it had to be changed a lot. I found rinsing them first will get the powder off them I guess from being in the box. If you have this type of humidifier then your stuck using the water panels.