Quote Originally Posted by bombdiggity
the exhaust fan is on the left wall of the box, you can kinda see it in one of the pictures.

Exhaust fan measures 4 1/2", intake fan is 3 1/4"

not sure of the cfm rating on the exhaust

intake is rated at 31CFM.
That looks like a 120mm computer fan. Probably anywhere from 91-141cfm.

Look up Honeywell Turbo fan. I'd say it's about 9" in diameter but would probably work well in your room for both intake/exhaust.. and fully adjustable.

If you can find a smaller similar fan then those would probably be better for your particular space. Something more like 7" or so.