This is not your run-of-the-mill shed. The Tetra Shed is a modern, modular, multi-use shelter/space that you build yourself. Constructed from a plywood core that comes flat-packed, the 28-sq. foot interior features programmable under-floor heating and LED lighting. How you configure & use it is up to you: sauna, kiosk, or secret hideout. You can even join a few together to create a small house.