Abstract: “The energy consumption of buildings is responsible for 40% of total EU energy consumption and is the main source for greenhouse gas emissions (about 36% of the EU’s total CO2 emissions). In this context, refurbishment of the existing building stock represents one of the main solutions in order to improve the energy efficiency in the building sector. Consequently, the aim of this study is to present data in this field, based on a case study for a block of flats in Bucharest (Romania). Heating energy consumptions are compared, before and after thermal rehabilitation interventions. The computations are performed based on the Romanian calculation methodology concerning Building Energy Performance, using standard and measured climatic data. It is worthwhile to mention that the results are compared to measured heating energy consumptions for several heating seasons.”

Keywords: rehabilitation of buildings, heating energy consumption, reduction of CO2 emissions