I have a small server room with a measly portable AC unit at the moment. However, the room is actually hotter when the door is closed than when the door is open. Needless to say, the portable AC unit is not an effective solution haha. I want to know what cooling options might be available for a small server room that's located in the middle of a 3 story building on the first floor. So far all I can think of is creating some kind of duct to exhaust all the hot air, but I really need some other suggestions to find out what might work best. Thank you.