New4Old – Reconversion of architecturally valuable buildings to Nearly Zero Energy Buildings (NZEB)

January 25, 2019


Client: EREC (European Renewable Energy Council)
Period: 2007 – 2010


New4Old is a European subsidised research project with a view to drawing up a vision of how renewable energy technologies can be integrated in existing buildings, taking into account cultural and architectural building characteristics. This research project is comprised of 3 major components: research, implementation and dissemination within Europe. For more information about this project, please visit

As a project partner, 3E was jointly responsible for the following tasks:

  • Coordinating the preparation of a comprehensive technical manual to assist designers and consultants in the translation of NZEB objectives into existing architecturally valuable buildings.
  • Developing energy concepts for various specific architecturally valuable buildings in Europe (Brussels, Vienna, Versailles, etc.).
  • Ensuring dissemination through international events (in Athens, Dublin, etc.) and the website of New4Old (

The demonstration project ‘Renewable Energy House’ in Brussels also fits within this project. This architecturally valuable office building makes use of energy-efficiency measures (including internal and external wall insulation) as well as renewable energy technologies (geothermal energy, photovoltaic solar energy, solar thermal energy, etc.). This has enabled the entire annual consumption of heating, cooling, lighting and auxiliary consumption to be provided by renewable energy sources.

For more information about this project, please visit