A Norwegian eco home incorporates a heated pool and a sauna, but still produces three times more electricity than it uses.
Researchers designed the house with a solar-powered roof in collaboration with architects firm Snøhetta. Heat exchangers use excess energy to heat the outside swimming pool and the house even has its own sauna.
Insulation is so good that each floor has just one radiator, and each room has sensors to ensure that light and heat is directed efficiently. It produces 23,200kWh of energy a year but requires just 7,272kW to run.
It may look like a Portacabin that has been involved in a nasty accident, but this slanting roofed building is actually the ultimate ecohome...