3 Blades Heat Powered Stove Fan for Wood/Log Burner/Fireplace

TOMERSUN 3 Blades Heat Powered Stove Fan for Wood/Log Burner/Fireplace Compact Size--8.7 x 6.7 x 3.6 inches,the material of the stove fan is aluminum. No Batteries or Electricity required--The stove fan uses heat from the stove surface to spin, and adjusts its speed automatically with the stove surface temperature. Longer Lifetime--There is a Bi-metallic safety device at the base of the stove fan. If the surface temperature rises above around 300℃,the safety device gently elevates the front of the fan to protect the TEG and motor. Whisper-quiet--The only moving part is the blade assembly.You don't even know the stove fan is there,but you FEEL the WARMTH! Less Consumption ,More Efficiency--The stove fan will help reduce the fuel consumption and make the room warmer quickly.