Centrifugal fan RS

ductventilationplastic

• plastic casing • absolutely resistant to corrosion • backward curved impellers • can be used in all mounting positions • speed is 100% infinitely variable using auto transformers or electronic control • extremely low noise level Casing All sizes have an elegant, high-impact, flame-retardant plastic housing with an integrated terminal box IP44 and guide vanes. Impellers The impellers up to size 250 are made of plastic and from size 315 are made of galvanised sheet steel. The impellers are mounted directly on the rotors of the external rotor motors and are dynamically balanced on two levels with the rotor according to quality level G 2,5 / G 6,3 as per DIN ISO 21940-11. Electrical connection The electrical connection is made through a terminal box mounted on the casing with protection class IP44. Assembly Rigid folded spiral-seam tubes (Spiro), flexible aluminium or plastic tubes with standardised diameter can be used. Rosenberg tube fans can be used in all mounting positions. When used over several floors of a building, the local fire safety regulations must be observed.