Giggles like I said it's nothing special but here is a set of pics of what I'm doing for ventilation in a closet where I can't modify the interior of the closet:
Plywood door on a couple face hinges has a 15"x15" triangle cut off one corner:
A simple piece of trim cut at 45 degrees on the ends to the equivalent size to create a sealing edge along the angle-cut door:
In the background you can see what I did for air spreading... while I could actually exhaust out of the room, what I did here was I fed a duct up into a makeshift (cardboard and spraypaint) replacement panel in the ceiling... so the exhaust hose feeds into the ceiling, which helps to eliminate what little air-flow noise there is at that point.

While the air doesn't leave the room, what I did was slip a panel open on the opposite end of the room, so all the air has to pass through the space between the old ceiling and the suspended ceiling before it slips back into the room. Not only does this circulate the air effectively (as a bonus, you can actually open different panels depending on where you want air blowing) but it only gives the air more time and space to cool down a bit.
Combined with this muffler there is no wind noise at all, anywhere... just need to get the fan intself isolated now.

Also, as you can see, I have panda film over the corner... the plan was to replace that with the wood i cut away, but it doesn't fit quite right so I'll have to trim it up, or just screw it and leave the plastic. It would look, admittedly, much cleaner with the wood in place.
These are the air intakes... the curtain is stapled in the position you see here to keep the intakes clear... then a small piece of furniture is slid in front at an angle and hides the whole thing:
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Screen stapled to the back of the door supports the foam pad filters that are on the front, which act effectively as a light blocker in both directions.
Oh, and then there's weather stripping that runs along all the seams, as you can see in a couple pictures.
That's about all there is to say about the ventilation system... it's working pretty effectively.
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Mother chamber pics:
Air intake at the bottom... have since secured the screen better so it doesn't stick out like that:

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I forgot to take a pic, but I wrapped the exhaust fan in the same black foam filter stuff and used an elastic to hold it on. As a result I have every light leak at least heavily filtered, if not blocked entirely. Hooray!
I'll get pics of the exhaust fan and the make-shift light fixture and diy'd reflector tomorrow...