WerkHaus is built on an exposed concrete slab that is fitted with radiant hydronic tubing. Keeping with the multi-functional design theme, the sauna woodstove not only heats air, but also heats water that flows through a compartment attached to the stove. The hot water runs through the tubing in the concrete floor, heating the concrete and equipping the structure with a second heating method. Since car work requires Philip to lie on the floor underneath cars, the warm concrete provides a bit of luxury to this otherwise uncomfortable task. The propensity of concrete to store heat for a long period of time allows Philip to save money and energy by not burning large quantities of wood. Wood is a renewable fuel source and is less harsh on the environment than other oil-derived fuels. Facilitating energy conservation, hot water for the radiant system is stored in a tank in loft to be utilized when the woodstove is not in use.