between historic role models and contemporary functionality. - window system forster unico XS door system forster unico Fabricator: Acklin Metall- und Stahlbau AG, Zug Architect: MAI Architektur GmbH, Lucerne [...] windows were no longer viable for energy efficiency reasons. Here, the planning team chose the forster unico XS window system, which is virtually identical to the appearance of its historic predecessor. Despite [...] rooms inside are marked by outstanding quality while never disowning their original use. The forster unico door system also plays an important role here, with both the opaque and glazed door versions offering