If all rigid metal duct cannot be used, then flexible
all-metal venting can be used, but it will reduce the
maximum recommended duct length. In special
installations when it is impossible to make a
connection with the above recommendations, then
UL-listed clothes dryer transition duct
may be used as
transition venting between the dryer and wall
connection only. The use of this ducting will affect
drying time.
If flexible transition duct is necessary, only UL-listed
duct identified for use with clothes dryers is approved.
The following directions must be followed.
• Use the shortest length possible.
• Stretch the duct to its maximum length.
• Do not crush or collapse.
• Never use transition duct inside the wall, flooring,
ceiling or inside the dryer.
• Avoid resting the duct on sharp objects.
• Venting must conform to local building codes.
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Exhausting the dryer.
Exhaust System Requirements