The theme of my bachelor`s degree is energetic renovation of an older public building. The required standards in the process of renovation were the European energy efficiency directive (EPBD) and local Slovenian legislation. The purpose of my bachelor`s degree was to name the measures that are needed to help the kindergarten in Postojna to become an energy sufficient building. These measures are, for example, the replacement of old windows with new ones and an additional layer of thermal inuslation on the external walls and roof. The definition of thermal transitivity was calculated with the program TEDI and the final analisys of energy balance was calculated using the program TOST. With these measures, mentioned above, I have reached the demanded terms of energy sufficiency.