Industrial dehumidifiers remove excess moisture from the air in
order to prevent rust, mildew, and damage to electrical
components. They also add heat to the area being treated,
further reducing the relative humidity of the surrounding air.
There are four basic types of industrial dehumidifiers. Air
cooled devices force moist air over a cold, dehumidifying coil.
The moisture condenses out of the air onto the coil and drains
from the coil into a container. Water cooled dehumidifiers
derive their name from how they remove excess moisture by
circulating cool water through a system of coils and pipes.
Industrial dehumidifiers with solid desiccant rotors use ceramic
wheels or disks whose surface is covered with a specialized
desiccant. Electric or gas-fired heaters are often used remove
the trapped condensate from the desiccant. Other removal methods
include steam and positive temperature coefficient (PTC)
heaters, self-regulating devices that do not contain doped,
polycrystalline ceramics. Unlike other industrial