A model project for the research topic of “Energy-efficient schools”: in summer 2009 the existing Haus Overbach education centre gained two new buildings – a scientific education centre and a guest house. Both new buildings meet the passive house requirements, while the education centre is also equipped with a number of innovative building technology details such as switchable glazing.
The Käthe Kollwitz School in Aachen (Germany), built in 1951 and extended in 1995, had passed its prime. A comprehensive building refurbishment was seen as the way to improve classroom conditions significantly, while reducing energy costs. To achieve this goal the thermal insulation was improved and the heat supply was changed to remote heat.