Five years of educational buildings conformant with the efficiency house plus standard : insights from the accompanying research / published by Federal Institute for Research on Building, Urban Affairs and Spatial Development within the Federal Office for Building and Regional Planning, Federal Ministry of the Interior, Building and Community ; contractor and authors Fraunhofer Institute for Building Physics, Department of Energy Efficiency and Indoor Climate, Stuttgart, Heike Erhorn-Kluttig, Jessica Preuss, Hans Erhorn
