Ok.
After having a few more sticks in the room, 190cfm fan is not enough.
I also think the exit diffuser I got to use as the intake (purely because it looked cool) is hurting the airflow.
So today I ripped out the diffuser and all the 4” stuff and ordered a 6” 390 cfm fan.
I’m looking for a nice looking 6” intake to mount to the joists and will run 6” all the way outside.
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