The motor and module are protected, and it runs quietly with great thermal conductivity A must-have for any stove owner This wood stove fan is heat powered, which means it does not need any batteries or electricity to operate The wood stove fan is equipped with a bimetal device that slightly raises the fan edges the temperature approaches the maximums operating temperature, protecting the motor and thermoelectric module Make of Iron, high thermal conductivity, rustproof and wear resistant It can be used for a long time without any damage or deformation Enjoy faster and more effective heating with this fan, perfect for wood burning stove and pellet stove, Manufacturer: HDOYTXXM