The apartment buildings selected for the EU-GUGLE project demonstration are located in two districts: the wider city centre and the western part of the city.
The total area to be renovated is 40 000 m², and features a wide range of different building types with different construction systems and construction materials from 1960s onwards, representing a typical city building composition. Almost all of the selected buildings were characterised by high-energy demands and diverse technical difficulties. The envelope had insufficient thermal protection and required a high amount of energy for space heating and domestic hot water preparation. Most of the buildings were connected to a district heating network.
The selection of pilot private apartment buildings aimed to identify the wide spectrum of issues and problems that could occur in the renovation process of housing stock in the city.