Back Draught Shutters

Back Draught Shutter - Open

Open - air pressure from the fan opens the flaps, and allows air through the shutter.

Back Draught Shutter - Closed



Closed - Once the fan is off, no air (or light) can pass back through the shutter.

 

The spring operated flaps close when there is no positive air movement, preventing any air back-flowing when fans are turned off. 

      - Galvanised sheet steel housing

      - aluminium flaps

 

When installed, the back draught shutters need to be orientated with the hinge area vertical, as shown in the images.

Back Draught Shutter

BDS 150mm

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Back Draught Shutter

BDS 200mm

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Back Draught Shutter

BDS 250mm

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Back Druaght Shutter

BDS 300mm

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