Description: No Batteries or Electricity Required - The Stove Fan Uses Heat From the Stove Surface to Rotate, Adjust its Speed Automatically with the Stove Surface Temperature. Large Air flow,Increase Stove Efficiency with Burn Less Fuels,Silent Operation.Less Consumption ,More Efficiency - Reduce the fuel consumption and make the room warmer quickly. Stove Fan Whisper Quiet - The only moving part is the blade assembly.Say good-bye to the terrible noise . Fireplace Fans Material - Made of high strength aluminum alloy which makes the stove fan no burr, fined and neat surface. no deformation and no discoloration even after long time working under high temperature. Saving and environmental protection - The heat powered stove fan is designed to circulate the warm air created by a wood / coal or pellet burning.FULLY utilize the heat from your wood stove and disperse it to your room, and make the room warmer quickly,Less Consumption ,More Efficiency--Reduce the fuel consumption. Specification: Material: aluminum alloy Number of blades: 6 Blade diameter: 180mm Air volume CFM: 180-210 Motor speed: 800-1100rpm Noise: 35db Starting temperature: 5-75degree centigrade The best working temperature: 80-250degree centigrade Maximum temperature: 350degree centigrade Size: 180x100x190mm/7.1x3.9x7.5inch Package Includes: 1 Piece Heat Powered Stove Fan Note: Please allow 1-3mm measuring deviation due to manual measurement. Due to the different monitor and light effect,the actual color of the item might be slightly different from the color showed on the pictures.Thank you!