Paul Oman wrote:
Hello

Is it OK to vent a dryer vertically into an attic crawl
space instead of horizontally thru an exterior wall to the
outside? - paul

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.

--
Joseph Meehan

26 + 6 = 1 It's Irish Math