• Harmonized Energy Performance assessment, based on the EU Common Voluntary Certification System (EVCS) for the energy performance of non-residential buildings. Benefit from a reliable tool, allowing the comparability of buildings in the EU.
  • Test the implementation of a progressive renovation roadmap towards the NZEB (Near Zero Energy Building), in accordance with EU directives (EED, EPBD).
  • To test the link between low-energy renovation and the quality of indoor environments.
  • Test the difference between calculated and actual energy performance by linking the energy certificate (based on calculations) with the actual energy measured.
  • Test the link between financial mechanisms and building energy performance, to support the use of existing financial instruments.
  • Building Energy Performance Passport: A data collection tool for the building owner, with consistent data storage at one location, including maintenance history and future maintenance steps over the life of the building construction.
  • Facilitate future actions, such as: renovation strategies, gradual renovation to the NZEB, due diligence reports, building evaluation).
  • Support for end-users (owners or tenants) by providing information on the energy quality of the building, on a reliable and standardized basis.
  • Valorisation of the pilot operations: on the ALDREN website, on the websites of all the project partners, at conferences or symposiums.
  • Issuing a pilot passport, summarizing their performance based on the methodologies and tools developed during the project.



Country: France, Slovenia, United Kingdom, Spain

Type: Only offices and hotels, deep renovations

Size: > 10000 m² if possible and at least 2500 m², but small buildings are not excluded provided that they have interesting technical characteristics (energy, IAQ measurement, etc.)

Phase: We must have different situations:

  • Before renovation: in the decision phase, in design, or in works
  • After renovation (in use)


Energy performance after renovation: (mandatory)

  • At least 60% energy savings between before and after renovation (buildings consuming much more than 125 kWh / m².year before renovation)
  • Or class B of the EVCS after renovation: <75 kWh / m².year if technically, functionally and economically feasible
  • Or close to class A after renovation = nZEB (<50 kWh / m².year)
  • Production of renewable energy (optional) already installed or planned

Health and comfort: (optional)

  • Buildings applying a European certification scheme (HQE, IVE, DGNB, BREEAM, …) with information on the relevant indicators
  • Or able to provide measurement or calculation results on these themes

Economic and financial information: (optional)

  • Buildings with global costs calculated
  • Or able to provide economic and financial data




This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 754159. The information in this publication does not necessarily represent the view of the European Commission.
© ALDREN. All rights reserved. Any duplication or use of objects such as diagrams in other electronic or printed publications is not permitted without the author’s agreement.


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