The thermoelectric effect, also called the Peltier effect after its inventor Jean Charles Athanase Peltier, is the direct conversion of temperature differences to electric voltage and vice-versa.

It works by the fact that when two dissimilar conductive or semiconductor materials are fused together to form an electrical junction, and a current is passed through that junction, the material on one side of the junction heats, while the other side cools. This creates heat transfer that can be used for cooling an enclosed space. Since the direction of heating and cooling is determined by the polarity of the applied voltage, thermoelectric devices can also be used as temperature controllers.

Peltier cooling units are mainly used for applications requiring a lesser amount of cooling 100 to 2,750 BTU/hr (~ 30 - 800 W). Unlike conventional cooling units, Peltier devices can be mounted in any position—keeping your condensate management in mind. With a protection rating of IP 66, they can be used both for indoor and outdoor applications.