Better Heat DesignThe chimney fan has 7 blades,which dissipates heat more efficiently than traditional 4-blade fans and has a larger air volume.Make you to enjoy the heat stove fan quiet and comfortable,warmth. Environmentally & EfficiencyThe fireplace fan is powered by the heat of a wood-burning fireplace or stove,no batteries and electricity are required,the more heat is generated,the faster the blades rotate,the more heat is dissipated to save on electricity bills. Overheating ProtectionThe chimney fan furnace fan is made of alumina,the fan will not rust and corrode when it is overheated,there is a metal safety device at the bottom( 350C),when it reaches this temperature,the equipment at the bottom will be activation. Automatical StartThe fireplace fan with a starting temperature as low as 50 C,The hotter the stove surface is, the more air the fan circulates. Super Quiet OperationSize: 5.51x3.93x7.67in.This fan working noise is lower than 35dB,will go unnoticed in any room.With no noise.No installation required. Specification: Model Number: Fireplace Fan Product Name: Fireplace Fan Item model number: YL911 Material: Alumina Color: black, gold Air volume: 180-210 Blade: 7 Blades Wind speed: 800-1100rpm Noise: 35dB Working temperature: 60-350c Net weight: 0.6kgs Gross weight: 0.8kgs Product size: About 140x100x195mm/5.51x3.93x7.67in Packaging size: About 185x135x215mm/7.28x5.31x8.46in Working principle: This is a fan that uses thermal energy as an energy source to circulate the hot air from the wood-burning fireplace. There is a thermoelectric module on the fan that acts as a small generator to drive the fan's motor. Electric current is generated when this generator module experiences a heat difference between the top and bottom surfaces. The bottom of the fan heats the bottom surface of the module, while the top of the module is kept cool by the fan's top fins. No batteries or power supply required! That is, as long as it is placed on top of the burning stove, it will absorb heat to drive the fan to rotate, thereby blowing the hot air above the wood-burning fireplace directly to the living area, increasing the air circulation in the room and improving the heating efficiency of the stove . The rotation speed of the fan varies depending on the temperature of the wood-burning stove. The higher the stove temperature, the faster the rotation speed. When the furnace temperature is so low that the fire goes out, the rotation speed slows down until it stops rotating. Product advantages: 1. Save fuel, fans distribute heat from the stove to provide better fuel efficiency; 2. Self-generating - no plug - no battery; 3. Quiet operation; 4. Self-start, adjust speed and stop; 5. Simple and stylish design. Precautions: 1. Place the stove fan on a smooth, flat surface on the stove top, near the side or back of the chimney. 2. The f