A dehumidifier is generally a household appliance which reduces the level of humidity in the air, usually for health or comfort reasons, or to eliminate musty odour. Large dehumidifiers are also used in commercial buildings such as indoor ice rinks to control the humidity level. ==Overview== By their operation, dehumidifiers extract water from the... Found on http://en.wikipedia.org/wiki/Dehumidifier
A dehumidifier is simply an air conditioner that has both its hot and cold coils in the same box. A fan draws the room's air over the cold coil to condense the moisture. The dry air then passes through the hot coil to heat it back up. A dehumidifier can be useful in environments containing sensitive electrical equipment like computer server rooms.
... Found on https://www.encyclo.co.uk/local/20625