It has an annual heating demand of only 8 kWh / sq m (0.7 kWh / sq ft) and a 250 sq m (2,691 sq ft) photovoltaic system on the roof. The building in Kaufbeuren, Germany, is the first to receive Passive House Premium certification.
Building uses a variety of energy efficient technologies, like triple-glazed windows, ground-source heat pump, ventilation system with heat recovery, and advanced lighting. Any surplus energy that is generated via the photovoltaic system, is fed back into the grid. Read more at http://www.gizmag.com/
