Can be used as a substitute for the anti-microbial pad HC22E1003.?� Also, can replace all Aprilaire humidifiers that use a #10 pad (i.e., 110, 500, 550...)
Change every year...twice a year if you have hard water!?� Left over deposits cause the water to "channel" thru the media and not disperse as well as it should, affecting evaporative capacity.
