Based on the definition given by the Ministry of Energy and Environment, in order for a building to be classified as nZeb it must be rated "A" or higher, according to energy clasification. In practice, this means that it must consume less than half the energy it would consume if it was built according to minimum standards set by the first Greek Building Energy Efficiency Regulation (2011) a change that is quite strict and "complicates" the design of new buildings.
This, combined with the fact that the implementing regulations of the European Union on the energy efficiency of appliances (Ecodesign and Energy Labeling) are now in force for all products installed in buildings, has created the need to update the national methodological design framework for buildings and evaluation of their energy efficiency.
In this context and after a relevant memorandum of cooperation signed between the Ministry of Energy and the Environment and the Technical Chamber of Greece, the later reviews the Technical Instructions related to the energy design of buildings in their entirety and issues a series of new Technical Instructions that aim to help the technical world to meet the modern design requirements of new buildings.
