The heat powered stove fan is used for circulate hot air from stove throughout the whole room,instead of rising to ceiling and keeping in small area. It helps to increase the efficiency of fireplacees with less fuel. Features: Heat powered, no batteries or electricity required. Eco Friendly, less consumption. Instead of the heat rising vertically with a standard stove, the stove fan uses its blades to divert the warm air horizontally.   Whisper-Quiet operation will not disturb your study, work or relaxing time. Easy to Install. High efficiency; Can circulate heat throughtout the room.   The stove fan inbuilt production system to stop the fan overheating. The fireplace fan can be started automatically, and the speed can be adjusted according to the temperature of the furnace. The fan base and blade are made from anodized aluminum which will not rust or corrode. Specification: Type: 8-Blade Dual Head Wood Stove Fan Color: black Power: heat powered Material: Aluminum Operating Temperature: 50 celsius -335 celsius Air Flow: About 220CFM     Noise: 15-20dB Recommended distance: 10-20cm Package size: 150*80*80mm Package weight: 870g Package List: 1 x 8-Blade Dual Head Wood Stove Fan Attention: 1. Please keep fan away from small children when in use. 2. Never handle the base of the stove fan, do not set the stove fan down on an unprotected surface when hot. 3. To move or carry the fan, always use the extendable handle while wearing gloves.