There was need for roof renovation and this made collector installation easier. Also the heat supplier of the settlement wanted green energy in addition to district heating. So there was a good opportunity both to mount collectors on the roofs

SOLID built the systems step by step in parallel with the roof renovations. Overall hot water supply for 756 residential units in 22 buildings. There is sophisticated feed-in system for solar heat: first it supplies the building underneath the collectors. When the building’s demand is satisfied, other buildings of the housing are supplied via the heating grid. When these are also satisfied, the heat is stored in two tanks with 60 m³ in total.