Material: The stove fan is made of aluminum alloy, so the fan will not deform when heated. The middle of the bottom of the fan can convert heat into electricity, so the blades can spin without batteries or electricity. Automatic operation: The fan blades are powered by heat from the oven. The rotation of the fan is automatically controlled by the temperature of the lower heating plate. Fan blade speed varies with temperature. The higher the temperature of the chimney, the faster it rotates. Humanized accessories: There is a temperature indicator panel on the top of the fan, which can display the current temperature of the metal plate to avoid burns when the temperature is too high. Easy to use: no installation required. Simply follow the instructions to install the fan to the side of the woodstove or fireplace, not in front or near the stove. When the fan heats up to 60C, it starts rotating automatically. Warm and comfortable: when there is no heating, our stove fans make full use of the heat generated by the stove and radiate it throughout the room.