The FRB is a plenum box with motorized opening working in vertical flow. A coupling sleeve is integrated into the suction to be connected to the ductwork if necessary Fan diameters are available from 400 to 1250mm with drives up to 225 frame size.
EN12101-3 certified for operation:
The casing is made of pre-galvanised Z275 steel. The FRB is suitable for snowy, windy or sandy environments.