Dryer vents…you can’t point them just ANYWHERE.
The surrounding loose fiberglass had been soaked and dried repeatedly over the years and had congealed into solid matts. The patch of moisture damage fiberglass was about a yard across.
The roof sheathing overhead showed loads of evidence of moisture condensation – staining, small amounts of rot around the roofing nails.
Obviously, it needs to be vented to the outside.