Zero energy home

It's looks interesting, it's the first step to a smart home, produce energy. Now, architect and designer could focus on the next item, reduce impact on environment. In background, computer can help to simulate sun/night impact to maximize use of theses new technology and minimize energy consumption. Theses simulation can help architect to put windows at the right place by calculating sun beam orientation. There's many examples like this. And the last point, a home "brain" can also help to reduce consumption of electric power, by tweaking all home power supply automatically, according to inhabitant's practice.