This dissertation was written as a part of the MSc in Energy Building Design at the International Hellenic University. The subject of study is the energy upgrade of representative public office buildings. The legislative framework is also addressed concerning the requirements for the public sector’s buildings and the impact on the refurbishment measures and the funding schemes. The dissertation focuses on the analysis of the Hellenic office building stock and proceeds with its categorization in seven classes based on the period of construction. Subsequently, the dissertation develops a four-step methodology based upon the building classification, which aims at examining an optimal package of retrofitting measures that is suitable for each building class and climatic zone and also generalizing the results by obtaining conclusions and developing policies for the whole building class and climatic zone. To achieve that, a virtual building model is developed as representative for each building class. Therefore, the study implements the methodology by focusing on one building class (class D) and one climatic zone (zone B). The examination of the building model’s existing energy performance and the refurbishment measures applied are simulated in the TEE KENAK. After the simulation, the results shows that the renovation package achieves energy savings up to 75.8% and the cost per floor area is 183.41€/m2 for 367.2kWh/m2 savings. Finally, by generalizing the results, conclusions are obtained if the renovation package is implemented in a larger-scale retrofitting.
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