I have a room of computer rack that with 2750 watt power needs, which according to this site, I need 9000 BTU/h AC. I'm deciding if I should put a vent in the room or not. When there's a ventilation, it will look like this: Note that there are two wind turbine ventilators on the roof. Also the attic is cool because of the good air circulation. Question for this scenario: 1. Will the AC and the grill vent vanquish the humidity from the air outside, which is warm and humid? 2. Will dust enter the room via vent despite the fact that the airflow is upward to the wind turbine ventilator? 3. Is 9000 BTU an optimum number? Is it too much or too little? I'm thinking most of the heat is drawn to the vent.
The second scenario will look like this: In this scenario, instead of a ventilation with a chimney, there is a ducting that caries heat, which escapes to the attic and goes to the wind turbine vents. Question: Will this give faster heat reduction whereas there is no way humid air will come to the room?