I remember this one I saw little while back too.
Woodcases... I'm sure they're probably really quiet, but wouldn't it be one hell of an insulator too?
thanks to Silverwmoon!
Lookit the cases carefully, they all have their own design compensations for the insulative properties of the wood.
The tower has the paper-esque sides, the clear one is... clear >_> and, uh... the one at the site has the vent which presumably leads from a powerful heat mover.