Automatic mode: The 6 blades of the fireplace fan are driven by the heat of the wood-burning fireplace. The rotation of the fan is automatically controlled by the temperature of the lower heating plate. Fan blade speed changes with temperature. The higher the temperature of the chimney, the faster the speed of the blades, distributing heat more efficiently and saving environmentally friendly fuel. HIGH QUALITY MATERIALS: The stove fan is made of aluminum oxide, so it won't rust, corrode, even melt or warp when it gets hot. At the bottom center of the fan is a unique bi-metal thermoelectric module that converts heat into electrical energy so the blades don't need batteries or electricity to spin. Ease of Use: No installation required. The 6 upgraded blades deliver more hot air into your home. When the surface of the stove becomes hot, the fireplace fan operates. When the surface temperature of the fireplace reaches 60C, the fan blades start rotating automatically. is below 60C, will automatically stop rotating. The best working temperature is 60-350C. Environmental protection: Heat powered, no battery or electricity required. The heat supplied stove fan is designed to circulate hot air created by burning wood/charcoal or pellets. The fireplace fan takes full advantage of the heat generated by the stove and aims to distribute the heat throughout the room. Quiet Operation: The fireplace fan is very quiet when in operation; Place the stove fan on the smooth, flat surface of the cooktop, near the side or back of the fireplace. Fireplace fan with 6 blades Stove fan No batteries or electricity required, Rotate fan blades based on fireplace temperature, Fan speed is determined by fireplace temperature. Furnace fans effectively take the heat from your wood stove and distribute it throughout your room. fireplace fan, no need to assemble, just place it on the stove. is compact and convenient to store and does not take up space. Do not place in front of the fireplace Please do not place the fireplace fan in front of the fireplace, that is, in the middle of the fireplace. In general, the temperature here is relatively high, up to 300 degrees Celsius. This temperature can easily damage our fans and the heating strip at the bottom will cause the unit to rise after induction to reduce the flow of hot air. This hook device allows you to remove the fan from the fireplace anytime and anywhere, which is more convenient than the hookless one. It should be noted however that the elimination at high temperature requires the wearing of gloves. There is a bimetallic safety device at the bottom of the device. Overheat protection strip. When the temperature reaches 300, the safety device will lift the bottom of the fan slightly to protect the normal operation of the fan and the TEG and the motor.