Really ? You put a copper dryer vent in?
I've never even seen one, we want a pic !!
Since I was building the garage I saw no point in trying to fix something that was being cut out for a door
5 single PAIN windows in the basement & all of them were either not sealed at all or (3) had broken panes
The new garage/Great Room I built sort of blocks the old vent
(Ian calls this a 3 family Apt building I think)