Product review (5 stars): Great product - easy to install
The water pad unit arrived in an Aprilaire branded package and was an exact duplicate of the one being replaced.  Clear and complete instructions for installing the pad were printed on the outside of the box.  It took me about 20 minutes to remove the old pad, thoroughly clean the inside of the humidifier, insert the new pad, and place the humidifier back in operation.

An important detail is to make sure that when you remove the old unit you retain the frame and the water distribution panel that hold the water pad in place.  I could see where someone could discard the entire assembly only to be very disappointed when they receive this water pad and discover that it is only the media used to facilitate the flow of water within the humidifier.  It must be inserted in the old frame and water distribution panel to be re-installed in the humidifier.