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 hot air throughout the room and warm your room faster. Automatically activates when temperature reaches 80C (176F). The hotter the stove, the faster the hot air distributor on the non-electric fireplace fan spins. (Do not exceed 345C / 650F). Thermal Operation and Energy Saving: The magnetic oven fan requires no power or batteries; a thermal module acts as a small generator to provide power 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 oven fan is made of anodized aluminum and can withstand temperatures up to 350C (662F). It will not deform, rust or fade even after prolonged operation at high temperatures. It is particularly suitable for ovens with low surface temperatures, soapstone surfaces and uneven surfaces on the top of the oven. This means it doesn't take up extra space. Quiet Operation: The magnetic fireplace fan has been carefully designed and features 4 new reinforced blades that operate efficiently and quietly. You will feel the heat but barely notice that the fireplace fan is running.