This house has it: an air-source heat pump, a rainwater harvester, central-vacuuming system, triple-glazing and motion-sensitive lighting system. It also features underfloor heating and self-closing loos. The five bedrooms are arranged over three storeys.
this is pretty much exactly how we are builing our retirement home in SC. Only it will be a little deeper but all spaced will be completely open to the windows in the front creating bay-like sections in the home for different rooms.
GREEN GUIDE TO PREFAB: Siting Your Home to Maximize Eco Efficiency