... YDWF74M4-470N-400 voltage: 380V / 220Vfrenquency:50Hzair volume: 4,235m3/h/4,235m3/hspeed: 1,400RPM/1,400RPMinput power: 190W ... plastic impellersmodel:YDWF74L6-3-522N-450 voltage: 220Vfrenquency:50Hzair volume: 4,590m3/hspeed: 900RPMinput power: 165Wcurrent: 0.8Anoise: ... YDWF74L6-522N-450 voltage: 380V / 220Vfrenquency:50Hzair volume: 4,590m3/h/4,590m3/hspeed: 1,380RPM/1,380RPMinput power: 160W ...