Im getting one my Friend down the street rom me has over 1200 gal of water in fish tanks. His house was sitting at 80-85% humidity in his home, after installing it he ran the unit for 2 days and brought the air down to a wopping 30 %. BEWARE when using it thou you dont want to bring the air down to fast. what ever your house is sitting at with humid air says its 70 % only take it down 10% at a time.

My friend has problems of the walls cracking from the humid air and suckign it out over a course of a 2 day period. but they do work thou...