ROOF MOUNTED AXIAL FLOW FANSHCTT/4-1000-B 5,5KW (400V50HZ) VERange of axial roof fans with horizontal air discharge configuration available in 2 version:-“B” models for air extract. -“A” models for air supply.Base manufactured from galvanized sheet steel.Cowl manufactured from spun aluminium. The impellers for models 315 to 400 are manufactured from one piece injectio