Roof Mounted Extractor Fans
The Roof Mounted Extractor Fan is particular suited to low pressure fume extraction systems generally associated with fume cupboards and fume hoods. This range of equipment is specifically designed for corrosion resistant applications and all parts in contact with the fumes are constructed from thermo plastic materials.
Outside mounting - The units are totally waterproof and constructed to prevent ingress of water from riving rain or snow. The motors, generally standard totally enclosed fan cooled units, are housed in PVC hood which is specially designed to ensure that the motor will not overheat even in the most extreme conditions. Due to its ease of installation, it is fixed directly to a prepared upstand at roof level, costly and unsightly ducing generally associated with conventional centrifugal fans is no longer required.
Fan Casing -Fabricated from rigid PVC sheet
Impeller - Forward multivane injection moulded polypropylene, this can be reversed for greater performance variation.
Motors - B.S. 5000 and B.S. 4999 motors, with standard motors to IP55 which can be upgraded to suit customers specification.
The units are available in five sizes, 160mm, 200mm, 250mm, 315mm, and 400mm, and incorporated PVC case and polypropylene impeller. The impeller is of the forward curve multivane type, although this can be reversed fro greater performance variation, manufactured by the injection moulding process incorporating a steel boss for motor location. The fan case is constructed throughout from PVC material and is arranged so as to incorporate and horizontal tangential discharge which is protected by a corrosion resistant grille. A specially designed inlet cone ensures an almost vortex free air inlet with resultant low noise levels.