Operating principle: No battery or power supply, the stove fan will generate kinetic energy by the heat generated by the stove. From around 50 C (122 F), the fan will start to rotate slowly; from 80 C (176 F), the airflow becomes stronger, then distributes the heat evenly throughout the room. Excellent quality and good durability: The chimney fan is made of anodized aluminum which will not rust or corrode. The base of the fan is equipped with a safety device. When the surface temperature exceeds 250 C (482 F), it gently lifts the front of the fan to avoid safety hazards caused by overheating of the motor. No installation required: There is a hook on the stove fan for easy transport. No installation is required, just follow the instructions to place your stove fan to the side of the woodstove or chimney, not directly in front of or near. Low noise and energy saving: With noise less than 35dB, it is very quiet when working. By using the hot air generated by the combustion of wood / charcoal or pellets, it improves the circulation of hot air and reduces the consumption of wood in the stove, so that the heat can be quickly transferred throughout the room, which is a thoughtful winter gift. Product description Why do you need a stove fan? Do you have a fireplace in your family? If so, you might have the problem of easily feeling the heat near the fireplace, but this is difficult for the whole room. This is because of the heat that rises vertically with a stove. stove fan is an excellent aid to circulate the air cha Noise protection The fan blades spin faster with increasing temperature and make a quiet, distraction-free noise of no more than 35 dB. Thermoelectric module When the temperature of the thermoelectric module reaches 50 or more, the fan blade begins to rotate slowly. The higher the temperature, the faster the rotation. Heat sensitive metal A safety device to protect the motor from overheating when the surface temperature exceeds 250 (482 F Parameter Operating temperature:> 50 C Max. Operating temperature: 350 C Optimum operating temperature: 80 - 250C Air flow: 180-210 CFM Noise level: