Automatic working: When the fireplace fan is placed on top of the stove, it starts automatically and adjusts its speed according to the temperature of the stove. When the furnace heats up, the fireplace fan accelerates. furnace cools, the fan stops automatically. Improved Technology: The chimney fan uses improved technology which is faster and accelerates the heat flow. The stove fan is designed to circulate the hot air produced by a wood / coal or pellet stove. The operating temperature is around 55C-345C. Premium Material: The frame is made of high quality aluminum alloy, which can withstand high temperature and prevent corrosion, and will not deform or fade even when working at high temperature for a long time. Easy to use: the stove fan does not require power or battery. The wood-burning stove fan used in wood-burning fireplaces draws electrical energy from the heat generated by the fireplace, wood-burning stove or pellet stove to efficiently disperse hot air in the room. Applicable: The petal-shaped fan propeller is beautifully designed, and the operating noise is less than 35D, which does not disturb your work and rest. The size is about 16.1 * 10.5 * 20.5cm / 6.34 * 4.13 * 8.07in, easy to transport and suitable for tight spaces. Perfect for all kinds of wood stoves, gas stoves, etc. Product description Description: The chimney fan adopts improved technology, which is faster and faster heating flow. It is & nbsp; portable & nbsp; suitable & nbsp; in tight spaces. Very suitable for all types of wood stoves. Features: Name: & nbsp; Chimney fan Product model: & nbsp; EF-705B Material: & nbsp; aluminum alloy Air volume: & nbsp; 0-250cfm Propellers & nbsp;: & nbsp; 5 Speed & nbsp;: & nbsp; 0-1 & nbsp; 300 & nbsp; rpm Noise: