Maximum Length of Exhaust Duct
Maximum length of 100mm diameter duct with 100mm hood.
Number of 90˚ | Rigid | Thick Wall Flexible Metal | |
elbows/bends | (fully extended) | ||
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0 | 19.5m | 10.9m | |
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1 | 16.5m | 9.4m | |
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2 | 13.4m | 8.2m | |
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3 | 10.6m | 7.6m | |
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4 | 8.2m | 7.0m |
For exhaust systems not covered by the exhaust duct length charts (such as multiple unit hook- ups, plenums, and
Alternative Installation for Close Clearances
Venting systems come in many varieties. Select the type best for your installation. A typical
| swivel collar | |
sections separate, | wall connection | |
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fittings can face |
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same or opposite |
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swivel collar | telescoping | |
sections | ||
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Extra long |
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beveled edges | ||
for dryer | ||
allow corner | ||
connection | ||
installations | ||
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The Maximum length using a 50mm x 150mm duct with two elbows and a 65mm exhaust hood is 2.4 metres.
Refer to the venting system kit manufacturers instructions.
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