You do not need them, such as batteries or electricity. Can be powered by the heat of the stove, it circulates well efficiently warm air into the room. Stove fan is designed to supply the heat current. It does not require batteries or electricity. Can be powered by the heat of the stove, it circulates well efficiently warm air into the room. Stove fan is designed to supply the heat current. Circulation of improved thermal air is able to provide greater comfort, wood stove that was used is reduced by 28%.