Air movement - one way direction relatively cooler air in and bringing the relatively warmer air out knowing warm/hot air always on top of cooler air .....

Having only ONE window open; unless the pressure in the room is higher, the draft it creates will occure in a short moment (hundred or thousand of a second) and the pressure in the room and outside will be equal; this is the very reason having the side panel open does not make the chassis any cooler.

Open case is to facilatate easy access for product review where components could be swapped frequently without the fuss.

One must remember in logic term "Set" and "sub-set".;)

Haven the side of my case open help alot since the fan on my SLK is sucking instead of blowing (so, now it blows all the hot air out of the case, if it's open)/

if only airodynamics were that simple