A manhole, grilles on a sidewalk and two pipes coming out of the fridges of a Migros store. These are the only external signs of a heating network, known as “anergy”, of a new building in Saxon (VS). This closed circuit forms an underground loop 240 meters long. It draws its heat, around twenty degrees, from the ground, an underground car park, Migros fridges and it supplies four heat pumps. Enough to heat, or cool in summer, the ten shops and the 72 apartments in the building.
