The homeowner has added an additional 500 square feet of living space to this house since 2006. He has roofed this area in a standing seam steel roof, and added a peel-and-stick photovoltaic system rated at 1.9 kilowatts. If that weren’t enough, he is experimenting with 500 linear feet of tubing under this steel roof to see if he can heat up 250 gallons of water to a usable temperature of 80° to 100°.