... Rainproof cowl hat fan,Dia.300mm~1120mm. Volume:3300~53000m3/h, Pressure:62Pa~350Pa, Power:0.37kw~5.5kw, Voltage:380V/440V contentrainproof hat fan ... ,axial fan:Dia.300mm~1120mm.Volume:3300~53000m3/h, ... 37kw~5.5kw,Voltage:380V/440V/OtherCentrifugal Fan ordinary roof WT4-85-11 series uses and conditions ... .75(0.8)-60.8 Roof Fan with rainproof hat