The solid form of construction, consisting of concrete floor slabs and 12–18 cm sandlime brick walls, allows a passive exploitation of solar energy. With a 20 cm external layer of insulation, the development complies with the Swiss passive-energy standard. Housed in the first cavity of the translucent triple glazing to the south-facing bedrooms are prismatic glass elements that reflect sunlight in summer while allowing lower altitude sunshine to enter in winter (see ill. above). In the second cavity, a hydrate of salt in grey polycarbonate hollow slabs forms a latent thermal storage mass. When exposed to solar radiation, it melts and absorbs thermal energy; on cooling, the energy is released and heats the internal spaces.






