I hear ya. The room I use as my "datacenter" is a small room, about 5ft wide and about 12 ft long. It has a conventional rack that you would buy from a diy or hardware store. I adjusted the shelve heights to acomodate a pc style computer case. so i have 2 boxes top and 2 cased bottom. There is than a smaller gap to the bottom shelve where my routers and network stuff is located, That is my datacenter :) It's quite amazing just how warm it can get in there. I installed a conventional household fan pointing up behind the servers to carry as much of the hot air away.