【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. The speed of the fan blade changes with the temperature.The higher the chimney temperature, the faster the blade speed, distributing heat more efficiently and saving environmentally friendly fuel.【HIGH-QUALITY MATERIALS】: The stove fan is made of aluminum oxide, so it will not rust, corrode, even melt or warp when it gets hot.In the center of theAt the bottom of the fan is a unique bimetallic thermoelectric module that converts heat into electrical energy so the blades do not need batteries or electricity to rotate.【Ease of Use】: No installation required. The upgraded 6 blades provide more warm air into your home. When the stove surface becomes hot, the fireplace fan will operate. When the chimney surface temperature reaches 60°C, the fan blades will start rotating automatically. If lower than 60°C, will automatically stop rotating. The best working temperature is 60-350°C.【Environmental Protection】: Heat powered, no batteries or electricity required.The heat powered 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 operating;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 thefan blades depending on the hearth temperature, The fan speed is determined by the hearth temperature. Oven fans efficiently take advantage of the heat from your wood stove and radiate it into your room.