1)Adopt the special three-backward stock;the dust can be removed autonatially in the heat exchanger. 2)Auto-alarm functions and automatic protection device. 3)Ventialtor and fan can start and stop aitomatically.(manual) 4)Automatically control wind input and output,automatically control the temperature. 5)There are two temperature control systems:computer-controlled and digital-controlled. 6)Special designing of heat preservation to ensure the lowest heat wastage. 7)The firebox has been specially designed with much longer service life,applied to various kind of coal. 8)This machine unifies burning and heating transfer together,special indirect heating technology,smoke and air walk their owned way 9)Heat efficiency aounts to 80%-95%,warming up fast,small volume,easy installation,high reliability,low price.