Produces the highest airflow over a wider range of stove surface temperatures. for use on freestanding wood stoves with a surface temperature between 185 degree fahrenheit - 650 degree fahrenheit (85 degree C - 345 degree C). heat powered wood stove fan that creates its own electricity from the heat of the stove and pushing up to 175 CFM (cubic feet per minute). ideal for those living off the grid or looking to increase the efficiency of their stove and use less fuel. whisper quiet and completely assembled.