Description: No Batteries or Electricity Required - The Double Stove Fan Uses Heat From the Stove Surface to Spin,Adjust its Speed Automatically with the Stove Surface Temperature. Silent operation, Less consumption, more efficiency. Large Airflow,Increase Stove Efficiency , Fuel consumption down, fuel saving,Silent Operation.Less Consumption ,More Efficiency - Reduce the fuel consumption and make the room warmer quickly. 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: 12 Blade diameter: 110mm Air volume CFM: 160-200 Noise: 35db The best working temperature: 50°C-350°C Maximum temperature: 350°C Size: 225x145mm/8.86x5.71 inch Package Includes:(2 Pack) 1 Piece Heat Powered Stove Fan