1Heat Powered: No batteries required, the fireplace fan is powered by the heat produced by wood, coal or pellet burning. Saving 16 percents of costs and reducing emissions due to fuel loss. 2High Speed: This fireplace fan can increase comfort faster, when the furnace temperature is low, the airflow is large and the speed is high. 3Low Noise: The 6 blades are well made, the spiral operation is quiet, and there is no noise from large blowers like other blowers, which does not disturb the rest. 4Automatic Startup: When the surface temperature of the furnace body reaches about 122, it will start automatically. It does not need to be assembled and can be used directly. 5Application: This stove fan is suitable for those who are off the grid or want to improve furnace efficiency and use less fuel, suitable for wood, gas, pelletizing furnaces, etc.