This is a simple reprap enclosure which also serves as a heated build environment. It gets up to about 35-40 degrees C just from the natural heat of the reprap as measured on the inside-top with a laser thermometer.
As a bonus, this seems to keep ABS smells in, and now that I've added a scrubber, even the inside isn't bad.
This is a pretty simple box. It's made from six pieces of 2'x2' 1/2" plywood from lowes, two hinges, a handle, and two cheap pieces of plexiglass.
Rather than just make a cube, I cut two of the 2'x2' pieces down to 22"x24" and used them for the top/shelf. This let me put the power supply underneath. Then I just drilled a couple holes for wires, added a light (whith some stuff I had laying around) and made a quick filament spool with some scrap wood. Finally I tacked on my makergear dimension fixture for good measure.
The final dimensions can be seen in the dwg or the png (which was made from the dwg).