Wagner, A., Lützkendorf, T., Voss, K., Spars, G., Maas, A., Herkel, S., 2014. Performance analysis of commercial buildings-Results and experiences from the German demonstration program„Energy Optimized Building (EnOB)“. Energy and Buildings 68, 634–638. https://doi.org/10.1016/j.enbuild.2013.09.047