Installation - venting
Table II
Effective duct lenght
Internal diameter or
edge length
0-20 m
20-30 m
30-43 m
43-60 m
100 mm Ø
110 mm Ø
120 mm Ø
130 mm Ø
Flexible ducting has been used for the
following example. See Table I for addi-
tional duct length factors for other
types of ducting.
Example:
Side connection, left. . . . . . . . . . . . 6.00
Length (L). . . . . . . . . . . . . . . . . . . . 1.20
Lower radius (R) . . . . . . . . . . . . . . 0.50
Height (H). . . . . . . . . . . . . . . . . . . . 1.00
Upper radius (R) . . . . . . . . . . . . . . 0.50
Wall pipe with louvred vent . . . . . . 3.80
Effective duct length . . . . . . . . . . 13.00
Result:
A duct diameter of 100 mm is adequ-
ate since the effective length is less
than 20 m as specified in Table II.
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