Large Airflow: 4 blades spread warm air throughout the room. Simply place the stove fan on a smooth, flat surface on top of the stove, near the side or back of the stove pipe. Low consumption and efficient stove fans help reduce fuel consumption and warm the room quickly This wood stove fan is designed to provide a very wide range of heat flow, so that it can dissipate the heat of the stove more efficiently and quickly increase the room temperature Heat output: The stove fan generates energy by converting the heat of the stove into electricity to drive the motor and rotate the blade. No batteries or electricity, environmentally friendly Longer service life There is a bimetal device at the bottom of the stove fan. When the surface temperature exceeds 300 degrees, the unit slowly raises the front of the fan toward the TEG and motor No batteries or electricity required, the stove operates automatically between 55 and 350°C. The only moving parts are the blade assemblies, making the wood