Ein Vergleich der nationalen Berechnungsvorschriften zur Gesamtenergieeffizienz und deren Realverbrauch anhand von 14 Bürogebäuden in Luxemburg, Deutschland, Belgien, der Schweiz und in Frankreich

A comparison of the national rules for the total energy efficiency including the consumption values for 14 real office buildings in Luxembourg, Germany, Belgium, Switzerland and France.

In accordance with the directives 2002/91/EC and 2010/31/EU the EU Member States are obliged to determine the energy performance for the different types of of buildings, and to documente it in an energy certificate. The details of the calculation method and the limit values are under the responsibility of the Member States, allowing for national leeway.
For 14 existing simple smaller office buildings without mechanical ventilation and air conditioning, the different calculations were carried out according to the respective national methods and compared to the the real consumption values. Although the differences between the calculated final energy consumption and actual consumption may rise above 100 % for some individual objects, the deviation is in average only 28 % for heating energy, and only a few percent for electricity, assuming an electric consumption of the office equipment. These average differences may be considered as sufficiently precise.