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.

1

100mm

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1

125mm

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1

150mm

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1

200mm

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1

250mm

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1

300mm

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