Generally I would say no. There may be some exceptions where that craw
space is vented a lot better than most and you live in a dry environment.
Otherwise, you are going to add moisture to an area you want to keep as dry
as possible. Vent to the outside. I might add that you would also be
depositing lint down there.
Anywhere you vent, you have to make sure that the vent pipe is not only
sealed against leaks of hot humid air into any other space, but also
that the vent duct is insulated so as not to heat up the attic.
Joseph Meehan wrote:
Go outside! Is the dryer electric, gas? Gas must be vented outside,
there are indoor vent kits for electric dryers but they have a tendacy
to be messy and add moisture where you don't want it :(
Appliance Repair Aid
In addition to moisture and mould in the attic, if you live in a cold
climate there's a chance venting into the attic could cause ice dams in
the winter. It's possible the heat would be enough to melt snow on the
roof, only to have it re-freeze, causing dams and more damage than
you'd ever want to face.
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