and Self-Powered: Thermoelectric module acts as a small generator to power the fan's motor. No batteries or electricity required! warm air circulation results in greater comfort and reduce wood consumption from your stove Long There is a Bi-metal device in the base of the fan.If the surface temperature rises around 300°C, the device gently elevates the front of the fan to protect the Teg and motor Start Automatically: Upgrade technology,faster speed,larger air volume.The heat powered stove fan is designed to circulate the warm air created by a wood / coal or pellet burning.Efficiently circulates warm air throughout the house Newly Designed Larger Air Volume,Lower noise.You don'for t even know the stove fan is there,but you feel the warmth!You will enjoy the warm air of a quiet and comfortable environment Safty Design: The stove fan is made with Anodized Aluminum, able to resist high temperature, no deformation and no discoloration even after long for time working under high temperature, Manufacturer: XIAOQENAN