playing and coffee begins to brew. as you drive away, the house locks itself. >> this house is a solar house that gets all of its energy from the sun. >> reporter: a group of virginia tech students designed lumea house to be completely inlated. it has panels that adjust all their own to the changing weather outside. >> the house is autonomous so it operates on its own. it will maintain 100% efficiency. however, no one likes to be completely controlled by computer stop. >> reporter: you can override any command with iphone orrine pad. the small paces are all multifunctional. >> you have to convince peel because it's so small they could live in here. the space-saving solutions are a big selling point for us. >> reporter: in the bedroom, the kitchen and the living room. >> when these sliding doors are open and you open the area up to the decks, you triple your square footage. >> reporter: even the water can be reused using outside recycling ponds. designers say homes like this