I was recently visiting some family in North Carolina (I’m from Louisiana) and I had never seen such a huge randomly placed vent. When the switch was turned on this vent the louvers would open and direct air into the attic.
Something to note was that the bathroom vents would blow warm attic air at a pretty high pressure when this exhaust system was active.
It seems that none of the exhaust vents are properly vented through the exterior of the home.
Have you ever seen anything like this? Is this a mess of ventilation?