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Table II
Effective duct
length (m)
Internal diameter or
edge length (mm)
0-8
8-12
12-17
17-23
23-31
31-41
100
110
120
130
140
150
Flexible ducting has been used for the
following example.
Example:
Exhaust connection, left . . . . . . . 4.9 m
Length (L) . . . . . . . . . . . . . . . . . . 1.2 m
Lower radius (R = 400 mm) . . . . 0.5 m
Height (H) . . . . . . . . . . . . . . . . . . 1.2 m
Upper radius (R) . . . . . . . . . . . . . 0.5 m
Wall pipe with louvred vent . . . . . 3.6 m
Effective duct length . . . . . . . . .
11.9 m
Result:
A duct diameter of 110 mm is adequ-
ate since the effective length is less
than 12 m as specified in Table II.
INSTALLATION INSTRUCTIONS
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