Robust and Reliable technology concepts and business models for triggering deep Renovation of Residential buildings in EU

A big part of Europe's building stock is inefficient in terms of energy use, mainly as a consequence of excessive heat losses through building envelopes and lack of efficiency of the HVAC systems. Very few buildings are undergoing deep renovation, and when it happens it results often more expensive than initially foreseen.
Renewable energy production is still often underestimated, even if there is throughout Europe a big availability of RES.

The 4RinEU project offers an answer to these challenges by providing new tools and strategies to encourage large scale renovation of existing buildings, fostering the use of renewable energies, and providing reliable business models to support their applications.

4RinEU project minimizes failures in design and implementation, manages different stages of the deep renovation process - from the preliminary audit up to the end-of-life - and provides information on energy, comfort, users’ impact, and investment performance.

The 4RinEU deep renovation strategy is based on 3 pillars:

  • technologies - driven by robustness - to decrease net primary energy use (60 to 70% compared to pre-renovation), allowing a reduction of life cycle costs over 30 years (15% compared to a typical renovation);
  • methodologies - driven by usability - to support the design and implementation of the technologies, encouraging all stakeholders’ involvement and ensuring the reduction of the renovation time;
  • business models - driven by reliability - to enhance the level of confidence of deep renovation investors, increasing the EU building stock transformation rate.


Demo cases

Project reports




Booklet - June 2021

Cookbook - June 2021

Poster - July 2018

Leaflet - July 2018