The single suction fan series of Tae-il Blower Mfg. consists of three models Backward Curve, Air Foil, and Forward Curve Forward-Curve(Sirocco Fan)type fan is suitable for low pressure (0~60mmAq) and backward type and backward airfoil for medium pressure (50~250mmAq). Particularly, the backward airfoil fan with the cross section of the airplane wing has the limit load characteristic. Backward and backward airfoil products suitable for high-speed rotation and quiet operation are used in a variety of industrial and construction applications. Forward Curve(Sirocco Fan) type fan suitable for large air volume low pressure equipment and it is mainly used for air supply and exhaust system in construction field.