How to use 3 inch pvc duct for clothes dryer


Old 09-29-06, 02:57 PM
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Question How to use 3 inch pvc duct for clothes dryer

In a house custom built in 1994 a 3 inch pvc duct was used for the clothes dryer venting. All technical advice says do not use pvc due to static causing lint to stick, heat, and 3 inch pvc is too small anyway. The laundry room is in the interior of the lower level, and it is extremely difficult to put in the 4 inch smooth metal duct required. Is there some clever way I can filter the lint out before it is exhausted into the pvc pipe and also precool the hot dryer exhaust? Vent free dryers do exist but they are expensive, apparently slow in drying, and maybe the last possible choice.
Old 09-29-06, 06:12 PM
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Since the 3" pvc is too small anyway, it's probably not worth trying to make it work in the first place. Is there any way you can run the 4" metal duct out a different place?
Old 09-29-06, 07:50 PM
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Any codes that I am familiar with prohibit any type of plastic dryer vent.
Check your local codes and this reason alone may be enough reason to replace it.

When you use a smaller vent pipe than recommended the restriction will make the drier operate at a higher temperature.
Your dryer could be possibly cycling on the high limit control which is not a safe condition.

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