Non-electric heating: stove fan is an environmentally friendly fireplace fan for wood stoves. It is powered by thermoelectric technology, and the stove fan rotates automatically when the temperature rises, and requires no batteries or electricity. Ensure heat: the stove fan automatically rotates between 50 C (122 F) and 340 C (644 F). The hotter the stove and the faster the fan rotates, the warmer the air in your home. The included electromagnetic thermometer monitors the temperature of the oven. Silent operation: the fan noise of this thermal stove is less than 25 decibels and provides a quiet and comfortable environment. Coal, pellet or wood stoves use stove blower to enjoy warm air circulation in winter. High temperature protectionOur heat-activated fans have a high temperature protection device. When the appearance temperature rises to about 340 C, it gently lifts the front of the thermoelectric fan to protect the TEG and the motor. Distributes heat evenly: you only need to put this wood stove fan on the flat appearance of the stove. Dual motor design distributes heat more evenly. Material: aluminium alloy profile. Number of blades: 6. Air volume CFM: 180-210. Motor speed: 750-1050 RPM Noise: 35 dB. Color:Black Start temperature: 65C - 85C. Optimum working temperature: 100 C to 250 C. Maximum temperature: 350C