First off, I'm sorry if there is a more appropriate section for this. There is no section exclusively for fluid physics, and I am not really trying to engineer a prodct, so I posted this here. SO if you have to move it, go easy on me . Think of a compute as essentially a box with some fans which can be on any face of the box, and blow either in or out. My goal is to figure out ways to maximize airflow and minimize the # of fans used. I think it might be obvious that having the box covered with fans would be the most obvious maximum airflow. However, that's not feasible for the application. I was pondering the possibility of just having two fans that are rated for 50 CFM (cubic feet per minute) on one side and just a hole or holes on the opposite side. I figure that the fans would create a low pressure inside the case, and then more air would naturally flow into the case through the holes. On the contrary, part of me thinks that it would be better to have an equal number of fans exhausting air as fans that are intaking air. I think this because I figure "If I have two fans exhausting air, and air flowing through holes, to get inside, the fans will only be able to create a certain low pressure inside, and thus there won't be as much overall airflow through the case compared to having another two intakes." However, how great would the difference be? Should I be looking for a design with more exhaust fans, more intake fans, or an equal number? I want the highest "Overall Airflow -to- Number of fans" ratio.