... Roof ventilating fan,Dia.300mm~1120mm. Volume:3300~53000m3/h, Pressure:62Pa~350Pa, Power:0.37kw~5.5kw, Voltage:380V/440V contentRoof ventilating fan,axial fan ... schools, sports centres, hospitals, office buildings and so on. 2. Buildings and public housing: high-rise buildings, the local general ... NoSpeed r/minPressure PaFlow m3/minNoise dBMotorTypePower kw2.81450194.2-78.513.5-24.353-54YBDW/YDW-14A0. ...