Be Careful
If you go that route you will be adding moisture to the equation and will eventyually lead to mildew/mold. This was one of my problems in my attic that had bathroom vents from the previous owner terminating in it. I had to replace all the insulation and aggressively clean all the rafters and underside of the roof sheathing with aggressive chemicals. It wasn't pretty and it wasn't fun. The dryer will add much more moisture than a few showers a day.
I am working on a long term humidity solution for my crawl space but haven't committed to one yet other than running a fan out the window for most of the summer.
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