Features: - start automatically: upgrade technology, faster speed, greater air volume. Thermodynamic furnace fan to cycle from wood/warm air from the burning of coal or particles. The whole house warm air circulation effectively. - environmental protection and the power supply: the thermoelectric module ACTS as small generators, power supply for the fan motor. No batteries or electricity. Improvement of warm air circulation can improve comfort and reduce the fire wood consumption. - mute mute: a new design of vane, greater air volume, lower noise. You don't even know about furnace fan, but you feel the warmth! You will be in a quiet and comfortable environment to enjoy the warm air. - safety design: furnace fan support using anodic alumina, high temperature resistance, even to work long hours under high temperature deformation, discoloration. - a long service life: there is a double metal safety device at the bottom of the fan. If the surface temperature rise to 300 C above, safety device will push up the front of the fan, gently in order to protect the TEG and motor. Stove Fan Specifications: The number of blades: 5 Speed: 1350 RPM Noise: 25 db or less Start-up temperature: 50 or so Thermometer Specification: Name: Fireplace Thermometer Measuring range: 0-500 Type: Thermocouple Bimetal Thermometer Surface diameter: 63 (mm) Usage: magnet adsorption type Package Included:(as your choice) 1x Stove Fan