I agree w/ bigsby. You have plenty sufficent Airflow out of the room to keep everything cool. The main question here is: Where are you getting your "Fresh" air from? If you have no windows... then I would suggest running your Exhaust into the highest point, eg; ceiling if possible, of the next or current room, and fresh air from the lowest part. As we all know, heat rises. Keep the line "out" as straight as possible.

Hope this helps.