*The heavy-duty aluminum mesh frame holds its shape over the life of the water panel as the porous ceramic-type coating absorbs water and maintains the proper level of hydration to support the evaporation process. Water is vaporized as air warmed by the furnace passes over the water panel. Replace water panel annually
Fits Aprilaire Models 350, 360, 560 , 568, 600, 600A, 600M, 700,   700A, 700M, 760, 768