Technical Information

The grilles are made from a rectangle extrusion of upvc filled with an intumescent core. Circular grilles are contained within a rim of polished aluminium. Air Transfer grilles are suitable for areas which require to be ventilated but which must also be protected against fire – examples are fire compartment walls, fire doors etc. The grilles can also be placed in circular or rectangle ductwork where the mounting of a fire damper is not possible or desirable.


  • Standard grilles are 40mm deep
  • Rectangle grilles range from 75mm x 75mm to maximum of 600mm x 600mm in increments of 25mm
  • Circular grilles 100mm to 300mm diameter
  • Non standard sizes are available on request


Tested to BS 476 Part 20.

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