Overheating Protection & Longer -There is a Bi-metallic safety device in the base of the stove fan.If the temperature rises above around 300℃, the safety device gently elevates the front of the fan to protect the motor. stove fireplace fan- The stove fan help reduce the consumption and make the room warmer quickly, the stove fan is widely used for gas, electric, pellet stove or wood burning stove, stove fans work well and disperse hot air efficiently. Silent Operation- The only moving part of the stove fan is the blades assembly, so the working noise is below 25DB, very quiet. You can't feel the stove fan, but you feel the warm. Eco Friendly, No Batteries or Electricity required- The stove fan is powered by heat from your fireplace or wood burning stove. Adjust its speed automatically with the stove temperature. The the stove is, the faster the stove fan spins. Working Temperature- The general working temperature of the stove fan is 85°C - 350°C(185°F - 660°F). Usually the fan gets at about 55°C, and turns most efficiently when the temperature reaches about 250°C-300°C.