Roof exhaust fan REF-549 GMC AIR

Roof exhaust fan REF-549 GMC AIR

• Backward curved centrifugal roof fan with horizontal discharge.
• Usable for the exhaust of mildly polluted air.
• Up to size 500, the cowl is made of salty-water proof aluminium,from size 560 onwards, the cowl is manufactured from galvanised sheet steel.
• Backward-curved impellers mounted directly onto the rotor of the external rotor motors.
• The motorised impeller unit is balanced in two plains according to G 2,5 (DIN ISO 1940).
• Speed controllable external rotor motor, protection class IP44 (up to size 310L) or IP54 (from size 355), moisture-proof impregnation, thermal contacts mounted in motor winding.
• The motors are connected to a terminal box of protection class IP54, easily accessible after disassembly of the cowl.