This episode is set at a stylish home in Sudbury, Mass., designed by its owner and built out of industrial-grade insulated steel panels. Near San Francisco, Calif., licensed contractor and host Amy checks out the Rainwater Hog, a modular rainwater collector designed to fit between deck joists or string together on a wall. In Cambridge, Mass., host Kevin O'Connor visits top MIT scientist Dan Nocera, whose team has discovered a way to split ordinary tap water into hydrogen and oxygen for use in fuel cells, potentially making off-grid living a reality. Kevin takes the latest induction cook tops for a test drive and shows off a high-design modular shelving product from England. Amy goes to the National Mall in Washington, DC, for the Solar Decathlon, a live competition among dozens of universities for the best low-energy-use house.