Caframo Ecofan Original Heat Powered Stove Fan - Black Blade - 800CAXBXEcofan Original Blade Heat Powered Stove Fan Black The Ecofan Original generates its own electricity using the heat of the stove. At 100 CFM the Ecofan 800 helps circulate warm air throughout the room instead of going directly to the ceiling. Generates its own electricity using the heat of the stove. Fan outputs 100 CFM to help circulate warm air throughout the room. Fan speed varies automatically with the stove temperature. Features: Ultra quiet