... blower fan,Dia.300mm~1120mm. Volume:3300~53000m3/h, Pressure:62Pa~350Pa, Power:0.37kw~5.5kw, Voltage:380V/440V/others contentRoof blower fan ... ,axial fan:Dia.300mm~1120mm.Volume:3300~53000m3/h,Pressure: ... than 150 mg / m 3.WT4-85-11 Fan Performance Table Selection Model NoSpeed r/minPressurePaFlow m3/minNoise ... -6YDW0.75(0.8)-60.8 Roof blower fan