Special device: From the point of view of environmental protection, the product has a built-in converter to convert thermal energy into kinetic energy. It can be self-powered without any additional electric power, effectively dispersing the hot air in your room, noise 25 dB, almost no sound, feel the heat in a quiet environment. Improved design: The four wider blades can bring more wind and improve efficiency. The fan circulates hot air at a speed of 1100 rpm (maximum speed per minute), which reduces wood consumption. You can enjoy the warmth of the room and increase the comfort. Safety settings: The ventilator comes with a bimetallic safety device at the base of the ventilator. When the surface temperature exceeds about 300 , it will carefully lift the front of the fan to protect the center mold and motor. The furnace fan is made of anodized aluminum and will not rust. It should be placed on both sides of the fireplace. Easy to use: No installation is required. All you have to do is place the stove fan on a smooth, level surface of your stove near the side or back of the stove pipe, and when the surface temperature under the fan reaches between around 80 C and 340 C, it will start to work. When the temperature drops, the stove fan switches off automatically. Perfect gift: A fireplace is the warm winter sun and the fireplace fan is a great gift for you and your friends and relatives for more warmth, it is the best choice. Product description Properties: 1) Uniform distribution of hot air in the room. 2) is heat operated, the speed is automatically controlled by the temperature of the fan blade. 3) No electricity required, no running costs. 4) Update 4 blades, fast rotating speed up to 1100rmp.5) Work at a temperature of 80 C (176 F). 6) Safe and integrated protection system; they cannot overheat. 7) Increases the efficiency of the powered furnace. 8) Quiet operation, no noise, ready to use out of the box. Features: Material: anodized aluminum - Product dimensions: 135 * 108 * 223mm Minimum operating temperature: 60 Maximum operating temperature: 350 Optimal range: 80250 - Operating speed: 1100 rpm Noise level below 25 dB Scope of delivery: 1x chimney fan Warning notice Never touch the base of the oven fan and never place the oven fan on an unprotected surface when it is hot. Always use the retractable handle to move or carry the handle when wearing gloves. Keep the ventilator out of the reach of small children when using it.