The cubature is clad with an air-permeable grid. The apartments offer a two sided orientation, allowing cross-ventilation similar to a historical wind tower, which is very pleasant in summer. The design elements on the facade and a lot of cooling greenery run throughout the building. Not only were the attic windows equipped with modern sunscreens, but all windows on the existing floors received discreetly hidden external protection against the intense southwest sun. As a minor detail for the residents, the desolate firewall of a neighboring house was renovated and designed. By immensely increasing the usable floor space, it became possible to identify within the city and deliver urgently needed living space. This project also stands out in terms of sustainability, as the core renovation and connection to the district heating network means that the building runs on ultra-low energy requirements. An additional cooling effect was achieved by greening the flat roofs.