For new buildings, the government has laid down in the Buildings Decree which energy requirements a new building must at least meet. It refers here to the so-called Energy Performance Standard NEN 7120. This standard determines the calculation of the Energy Performance Coefficient (EPC), which may have a maximum value. As of 1 January 2015, the EPC requirement for the energy performance of buildings has been tightened and adjusted in the Building Decree to an EPC requirement of a maximum of 0.4. The EPC integrally indicates the energy efficiency of a house / residential building or utility building. This is done on the basis of building characteristics, installations and standard user behavior.
It does not matter which energy-saving measures are taken, as long as the required energy performance is realized. However, the minimum requirements from the Building Decree must be taken into account. In addition, the Energy Performance of Buildings Decree (BEG) stipulates that an energy label is mandatory when selling or renting existing buildings – utility buildings and homes. When calculating the energy label or the Energy Index of dwellings, only fixed-rate calculation values may be deviated from if there is a controlled declaration of the product or system. Erwin Janssen, Product Manager at Nathan and among other things responsible for equivalence and quality declarations, tells us more: „For products or systems that perform better than the fixed value (standard value) in the standard or innovations that are not yet included in the standard , a manufacturer is well advised to have an equivalence or a quality declaration drawn up. In this way, the energy performance of the product is taken into account and a more positive contribution to the energy performance of a building can be delivered. “
We explain the difference between an equivalence and a quality declaration below.
The Building Decree allows the application of innovative techniques and solutions that are not included in the building regulations or designated standards. An independent organization checks whether the performance claimed by the manufacturer, for example in the field of energy efficiency, is justified. If this is the case, the manufacturer will receive an attestation of conformity stating that the product performs at least equal to or even better than the existing standard. That way, manufacturers can still make innovations.