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8. Flexible Duct
Shallow Roof Space
In shallow roof spaces, do not crush or kink exible ducting, as it will reduce air ow severely.
90 degree curve PVC or galvanise curve can be used as a substitute for the bend, refer to gure 14.
Figure 14
Figure 15
90 degree curve PVC
or galvanise curve
Important Note
Please do not crush or kink exible ducting, as it will reduce air ow and may cause noise to occur
through the system. Ducting needs to be kept taut at all times.
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