Updated- The new fireplace fan is equipped with a heat shield that uses the principle of logistics to increase the temperature difference and increase performance by an impressive 80% up to 180 CFM. Heat Distribution: Helps distribute warm air throughout the room and warm up your room faster. Automatically activates when the temperature reaches 80C (176F). The hotter the stove, the faster the hot air distributor of the non-electric fireplace fan spins. (Do not exceed 345C / 650F). Thermal Operation and Energy Saving- The magnetic furnace fan does not require any power or batteries; a thermal module acts as a small generator to provide energy to the fan motor. The magnetic fireplace fan increases the efficiency of the stove and reduces the consumption of wood and electricity. It is an essential accessory for stoves, fireplaces, stove pipes and chimneys. Durable and Safe- This powerless magnetic furnace fan is made of anodized aluminum and can withstand temperatures up to 350C (662F). It will not warp, rust or discolor even after prolonged operation at high temperatures. It is particularly suitable for ovens with low surface temperatures, soapstone surfaces and uneven surfaces on the upper part of the oven. This means that it does not take up any additional space.