... Rainproof cowl hat fan,Dia.300mm~1120mm. Volume:3300~53000m3/h, Pressure:62Pa~350Pa, ... contentrainproof hat fan,axial fan:Dia.300mm~1120mm.Volume:3300~53000m3/h,Pressure:62Pa~350Pa,Power:0 ... /440V/OtherCentrifugal Fan ordinary roof WT4-85-11 series uses and conditions of use: 1. Factory enterprise: factory ... fan DW3 roof-88-11, DW4-75-11 series uses and conditions apply: 1. Various public facilities of ...