Operating principle Without battery or power supply, the stove fan generates kinetic energy from the heat generated by the stove. From about 50 C the fan starts to rotate slowly. From 80 C, the air flow becomes stronger and distributes the heat evenly in the room. Excellent Quality and Good DurabilityThe chimney fan is made of anodized aluminum that will not rust or corrode. The fan base is equipped with a safety device. When the surface temperature exceeds 250C (482F), the front of the fan is gently raised to prevent safety hazards from overheating the motor. No Installation Required There is a hook on the stove fan for easy portability. No installation is required. Just follow the instructions to place your stove fan to the side of the wood stove or chimney, not directly in front of or near it. Low Noise & Energy SavingWith noise less than 35dB, it is very quiet when working. By using the hot air generated by burning wood / charcoal or pellets, the hot air circulation is improved and the wood consumption in the stove is reduced, so that the heat can be transferred quickly in the room. This is a thoughtful winter gift. Product description Why do you need an oven fan? Do you have a fireplace in your family? In this case, you may have the problem of slightly feeling the heat near the fireplace. However, this is difficult for the entire space. This is due to the heat that rises vertically with an oven. Oven fan is an excellent aid to keep the air cha to circulatenoise protection The fan blades spin faster as the temperature rises, making a quiet, distraction-free noise no more than 35dB. thermoelectric module When the temperature of the thermoelectric module reaches 50 or more, the fan blade starts rotating 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 250Cparameter Operating temperature: > 50 C Max. operating temperature: 350 C Optimum operating temperature: 80 - 250C Airflow: 180-210 CFM Noise Level: <35dB Never place the fan on an exposed surface when the fan base is still hot. It is not recommended to move the ventilator during operation, except in an emergency. Take this opportunity to wear gloves to protect yourself from burns or injuries from the rotating blades. Please ensure children and pets are supervised around your stove and fan. Delivery: 1 x 4-Blade Stove Fan 1 x Alternate Fan Blades 1 * Instruction Manual