D - 73262 Reichenbach an der Fils: In the district of Esslingen in Baden-Württemberg, a new neighbourhood is being built with a so-called "cold local heating network", which will not only heat the 41 houses in an environmentally friendly way in future, but will also contribute to the temperature control in summer. Photovoltaic systems, including storage, which will supply the neighbourhood with home-generated solar power around the clock, round off the energy concept. An innovative local heating supply based on geothermal energy takes centre stage.