Thermal power: Without batteries or electricity, the mini stove fan converts the heat from the fireplace or stove into electrical energy. 6 blades small stove fan: the higher the temperature, the faster the blades rotate, a larger volume of air, so it can radiate the heat of the fireplace more effectively and quickly raise the temperature of the room. Operating Temperature: The recommended work surface temperature is 50 ° C / 122 ° F to 350 ° C / 662 ° F [with thermometer]. Quiet and Safe: The unique design of the blade assembly can keep the log burner fan quiet during the fastest operation. Easy to use: No installation required, just place the wood burner fan on the smooth and even surface of the hob, near the side or back of the oven pipe.