Located in Bern, Switzerland, the “SOL-ARCH²” is a self-sufficient or what they call “plus energy” house that generates more energy than it consumes, while offering greater comfort and a better quality of living than an average house. The sustainable house produces energy via photovoltaic, photothermal and various passive solar elements which are used for heating, hot water and household electricity. Featuring thermal solar collectors on the southern balcony walls that generate sufficient energy for hot water, the energy efficient home produces electricity through photovoltaic solar modules located on the roof. While the big glazed windows conducts direct solar radiation to heat the internal air and the passive solar components, i.e. the floors and the walls. Based essentially on the use of solar energy, the plus energy house employs a new heat insulation system by the Wagner Systeme and Isover companies on all the facades, which come without thermal bridging.