This sort of technology is game-changing. The 12-foot-diameter mirrored dish uses a patented process to flex a flat mirror into a parabolic shape. That process, combined with the lightweight frame, should give it a very high efficiency at a very low cost. The company was started by Spencer Ahrens, a 23-year-old mechanical engineer, who, in between bouts of burning wood with the thing, got his masters degree from MIT. With the dish, you can make steam for directly heating and cooling your house, or run the steam through a turbine to make electricity.