Durable Material:The stove fan base and blade are made from anodized aluminum, which make the fan not rust or corrode,it is durable enough for a long time use. Better Heat Distribution:This 6 blades wood burner fan is designed to deliver a very broad thermal current,so it disperse heat from the stove more efficiently and raise the temperature of your room quickly.Circulates 180 - 210 CFM. Safety Protection Design:The stove fan comes with a Bi-metallic safety device.When the stove surface temperature rises above around 300,the safety device gently elevates the front of the fan to protect the center module and motor. Automatic and Silent Operation:No batteries or electricity required, the stove fan operates automatically with the stove temperature between 60 - 350C.And the only moving part is the blade assembly,which makes the wood stove fan almost totally silent even at top speed. Easy to Use:No installation required,you only need to place the stove fan on a smooth flat surface of your stove top ,near the side or back of the stovepipe.The hotter the stove surface is, the more air the fan circulates.