Exhaust fan commodity description: Air capacity: 43170 m3/h Size: 1380f-1380f-450mm Noise: f_64dB Power: 1.1kw Voltage: 380V Electric current: 2.8A Weight: 88kg Material: Frame: galvanized steel sheet, the layer of the galvanization is 180g/¼O·+and the frame is one-off molded, also there is a outlet in the bottom. Fan Blades: 6 pieces of mirror face stainless steel blades with the diameter of 1270mm and the angle of the blades is patented designed. The fan translations have all passed the experiment of homeostasis, which makes the air volume keep the same as the very beginning during the operational life span of the fans.