Climatic Influences on the Energy Demand of European Office Buildings Dissertation Approved by the Faculty of Building (Architecture and Civil Engineering) Dortmund University of Technology for the Degree of Doctor of Science in Engineering (Dr.-Ing.) by Dipl.-Ing. Jörg Schlenger Dortmund, Germany, 2009 Date of submission: 27.02.2009 Date of oral examination: 02.10.2009 Examination committee: Chairman: Prof. Dr.-Ing. Mike Gralla st1 Examiner: g Helmut F.O. Müller nd2 Examiner: Prof. Dr.-Ing. habil. Wolfgang M. Willems Climatic Influences on the Energy Demand of European Office Buildings Dissertation Dipl.-Ing. Jörg Schlenger, Dortmund University of Technology Abstract This dissertation analyses the total primary energy demand of office buildings in 25 European locations and the impact of the respective climatic conditions by the means of building simulation. An overview of existing climate classification systems and methodologies for comparison of buildings in different locations is followed by the definition of a representative office building model. Besides buildings with typical in-sulation levels per country, buildings with optimised façades in terms of insulation level and window proportion have also been analysed. Correlations between the lo-cation’s degree of latitude, the climatic conditions and the energy demand for heat-ing, cooling, ventilation and lighting have been evaluated.