... - 140,000m3/h Pressure:150- 600pa Roof Fan, Fan, Ventilator, Ventilation, Ventilating Fan, Ventilation, Ventilator Fan, Ventilation, Ventilator Fan, Air MoverFeatures: light weight, low ... .Application: To blow and exhaust air for the roof of large factory buildings suchas power plants, rubber factories, auto and motorcycle factories ... ³/h - 140,000 m³/h 3)Air pressure:150Pa - 600Pa. roof ventilator