The wood stove fan works without batteries, cords, or electricity and is environmentally friendly. It generates energy from the heat released by the stove surface. The base of the fan transmits the heat to the power generating units, and the power generating units convert the thermal energy into kinetic energy. The energy needed to drive the motor, then the blades spin. Upgrade 4 blades and distribute warm air throughout the room. Simply place the fireplace fan on a flat, smooth surface on top of your stove, near the side or back of the stovepipe. You should place the fan at least 4 inches away from the stovepipe. It will work when the stove surface is hot. Operating Temperature: 60°C -340°C (644°F): The stove fan spins when the temperature reaches 60°C. The hotter the base of the fan, the faster the fan spins and the more air the fan circulates in the room. It will slow down and stop as the stove cools. Anodized Aluminum Material: The wood stove fireplace fan is made of anodized