Features: 1. Start at low temperature: faster, larger air volume. Designed to circulate warm air generated by the wood/coal or pellet burning stove. Normal surface temperature is 50C~350C /122~662. 2. Environmental protection and self-powered: The thermoelectric module acts as a small generator to drive motor of fan. No batteries or electricity required! Improved hot air circulation brings greater comfort, fuel consumption is as low as 17%, fuel saving, enjoy heat from the stove faster. 3. Safety design: The furnace support is treated with anodized aluminum, high temperature resistance as high as 662F (350C), not be deformed or discolored even after working at high temperatures for a long time. 4. Silent operation: As the furnace heats up, the wood stove fan runs faster and faster, dissipating heat to the far corners of the room. It is almost silent. 5. Overheating protection: Bottom built-in bimetal strip to slightly raise the edge of fan when it is close to the maximum operating temperature to protect motor and thermoelectric module. Specification: Model: SF902S Operating temperature range: 122 degrees F to 662 degrees F (50 degrees C to 350 degrees C) Air volume unit: 180-210CFM Product size(approx.): Length 110mm/4.33in Height 145mm/5.71in Power: thermoelectric module Material: aluminum alloy Packing List: 1*Fireplace Fan