What is the LENOZ certificate?
To promote sustainable building, the government has created the LENOZ ("Lëtzebuerger Nohaltegkeets-Zertifikat fir Wunngebaier") certificate, a global assessment approach based on three pillars of sustainability:
- environmental preservation;
- economic efficiency;
- fair social organisation.
This voluntary certification aims to increase awareness of the sustainability of housing and the transparency in the property market.
It allows, among other things, to assess the building beyond aspects of energy efficiency and focuses in particular on:
- environmental assessment of building materials;
- health, indoor and outdoor air quality, comfort;
- choice of location.
The LENOZ certificate is partly based on the data contained in the building's energy performance certificate. The energy performance certificate (also known as “Energiepass”) provides information on the building’s calculated energy requirements and on CO2 emissions. It also outlines the energy performance class, ranging from A (the best class) to I (the worst class). The classification is based on the index of:
- primary energy requirements;
- heating energy requirements;
- CO2 emissions.