Evaporator coils are used to cool or remove moisture from air streams. They are sometimes called direct expansion. They are one of the four main components in the refrigeration or air-conditioning cycle. A liquid-vapor mixture of refrigerant enters the coil and cools the air as it evaporates, and eventually leaves the coil as a gas.

Typical applications for evaporators:
Comfort Cooling, Dehumidification, Process Cooling, Air Conditioning, and Refrigeration.