Help with room ventilation

[Toad37]

Maybe a half screened door with a box fan…?could control the fan with a herpstat using the cooling settings, once it hits a certain temp the fan kicks on and sucks the hot air out of that room. Set it to like ~82° and once it hits that temp the fan runs until it drops below 82°.


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I have a 12" box fan in there that is always on just to circulate the air. I thought about cutting a hole in the door and putting a metal vent in it towards the top. Like the kind you would normally have in a closet that has a hot water heater or furnace in it. Would that let too much air out? If it were just a stationary vent that wouldn't open or close?