... 2)Strong resistance to corrosion 3)Large air volume, low noise 4)Long service life Qingzhou Huinong ... and the fan has passed the experiment of homeostasis, large air folw, low noise, no distortion and no blending.4 ... parameters: ModelDiameter Blades(mm)Wind leaf speed(r/min) Air Volume(m³/h) Power Outer size(mm) Voltage Frenquency ... 1380*1380*450 380v 50HZ CE Certification Industrial air conditioner