It has no fans at all? I mean, I know you can put a big honking heat sink on a processor and get a fanless power supply. But video cards and HDDs generate alot of heat, too.
Hey, I'm a luddite. My crap is far from cutting edge. that's why I try to manage heat - so my stuff will last a long time.
The normal case exhaust fan usually serves to suck outside air past the hard disks to keep them cool. The computer under your desk in the first photo looks like a standard PC. I was just guessing that it was conventional.
My PC has a fan on the CPU 2 little ones on the drive bay and one big one that exhausts the case. I don't record vocals 2 feet away from it, of course, but I never thought it was that big of a deal.
I'm not busting you balls or anything. You just see alot of folks leaving the side open on their PC thinking it makes it cooler inside.