This is HTFC high-temperature smoke exhausting centrifugal fan produced by Quanda, and it is a box-type centrifugal ventilator with high efficiency and low noise, which can be operated continuously for more than 30 minutes at 280 C. According to the different installation positions, the fan can provide customers with 12 different angels’ air inlet and outlet positions. This product can be used not only for firefighting smoke removing, but also in ordinary ventilation. At present, this product is extensively used in office-buildings, factories, malls and hospitals, etc.