How is this fireplace fan working without batteries or electricity? It seems impossible, but this stove fan runs without batteries, cords or electricity. It works because heat is a form of energy. This stove fan is designed for usage on freestanding stoves with a normal surface temperature of between 60 degree centigrade-400 degree centigrade. Temperatures above this range may damage the fan and the electricity generating units. Features - Color: Black. - Material: Anodised aluminium. - Size: About 13.00X16.00X21.00cm/5.11X6.29X8.25inch. - Starting temperature: 60 degree centigrade (122°F). - Maximum working temperature: 400 degree centigrade (750°F). - AirFlow: 150-180CFM (cubic feet per minute). - Noise: <32dB. - No wires or batteries, convenient to install and use. - Use a stove or fireplace for heat. - The fan outputs 150-180 CFM to help spread warm air throughout the room. - Fan varies automatically with wood stove or fireplace temperature. - Ultra-quiet - radiates warm air through the room in a quiet and efficient way. - Increase the heating efficiency of your stove or fireplace. Package list: 1 x thermal power stove fan