Water Panel Frame Scale Control Insert for Aprilaire 350 360

The Aprilaire 4181 water panel frame. Aprilaire refers to this part as the Scale Control Insert. This frame houses the #35 Water Panel that is 13 wide 10 high x 1½" thick. The overall dimensions of the frame are 13¼ x 11¾ x 3" wide.

This frame is only used in the Aprilaire Model 350 and 360.