Automatic Operation: The 6 fan blades are powered by the heat of the stove. The rotation of the fan is automatically controlled by the temperature of the bottom heating plate (wind guide: 180CFM-210CFM, wind speed: 800-1100rpm). The speed of the fan blades changes with the temperature. The higher the temperature of the fireplace, the faster the rotation speed of the blades. Easy to Use: No installation required. Just follow the instructions to attach the stove fan to the side of the wood stove or fireplace, not in front of or near the stove. When the surface temperature of the fireplace reaches 87°C, the fan blades will start rotating automatically. If the surface temperature is lower than 40°C, the stove fan will automatically stop rotating. The best working temperature is 87-350°C. HIGH-QUALITY MATERIALS - The stove fan is made of aluminum oxide, so the fan will not rust, corrode, even melt or deform when it is hot. In the middle of the bottom of the fan is a unique thermoelectric