The thermoelectric module acts as a small generator to power the fan motor Not batteries or power required! warm air circulation results in greater comfort and reduces wood consumption from your stove The heat active stove fan is designed to circulate the warm air creat by a wood / coal or pellet-burning Efficiently circulates warm air throughout room Equipped with 6 Leaves, have faster speed and larger air volumes This stove fan gives you a quiet atmospheres The stove fan is designed used with coal, pellet, or wood-burning stove, Manufacturer: KieTeiiK