Product description.Operation: The thermoelectric module located in the to The inside of the fireplace fan acts as a small generator to drive the fan motor. So there is no need for batteries or electricity. to operate the fireplace fan. The fireplace fan is placed on the fireplace shelf and uses the temperature/thermal energy of the fireplace shelf to generate heat. electricity to drive the fireplace fan. The rotational speed of the fan varies according to the combustion temperature in the fireplace shelf, the higher the The higher the oven temperature, the faster the rotation speed, when the oven temperature is so low that the fire goes out, the hearth fan will slow down until it is hot. no longer turn. Normal operating temperature 50C to 100C 350C. Product structure: aluminum heat sink, thermoelectric module, bimetallic thermal conductor, fin. Environmentally friendly and energy efficient: Improved circulation of warm air by self-generation at low temperature. high temperature provides greater comfort and uses approximately 28% less wood for the stove. Safe design: the fan stand and base Chimneys are made of anodized aluminum, which resists high temperatures up to 400C (752F) and will not deform or discolor, even when operated at high temperature. high temperatures for long periods of time. Longer life: The base of the fan is equipped with a safety device; bimetal that gently lifts the front of the fan to protect the TEG and motor if the surface temperature exceeds 250C. Technical Parameters . 1Product model: MSBD-9057 2Operating temperature range: 50C~350C (122F~662F) 3Air volume: 160-220 4Air speed: 1000-1600rpm 5Noise: 25db 6Product weightNet weight 662g Gross weight 962g 7Product sizeLength145MM Width116MM Height145MM 8Single package size: 200*185*210 mm