Vergleich unterschiedlicher Energieausweis-Berechnungsarten mit den realen Verbrauchswerten

Three different methods of calculating the energy certificate were considered for 23 existing buildings and also compared with the actual energy consumption. The result of 69 energy certificates and 23 energy consumption bills for existing residential buildings were put in relation. Some individual calculated energy certificate results agree well with the actual consumption, however, regardless of the calculation method, there are deviations of up to 350 % from the real consumption. The three different energy certificate calculation methods were also set in relation to one another in order to determine the best possible type of calculation. This made it clear that the accuracy of the results of the type of calculation also depends on the size of the building. It turned out that the categorization of the construction method also plays a decisive role in the results and so the abolition of the ”very heavy construction method“ in the OIB guideline 6 with the 2019 version is not justified. In addition, suggestions for improvement are presented with regard to the orientation of the components, the integration of digital sun position and shading options, the household electricity requirement, the energy indicator according to the number of users and zoning.