The overarching ambition of the ALDREN initiative is to consolidate, promote and implement an extended harmonized procedure, based on the European Common Voluntary Certification Scheme for non-residential buildings (EVCS) and a set of relevant instruments, in order to support building deep renovation operations, all along the process, tackling its organizational, financial and technical components issues. In line with the development of the EVCS, the primary scope is focused on non-residential buildings (especially offices and hotels).

Hotels and offices have been identified by the Triple E market study as the sectors that are most likely to benefit from a common European scheme. The characteristics of suitable buildings have to fit the requirements for deep renovation (at least 60% of energy savings or achieved NZEB level). For economy of scale, it is intended in the proposal to certify larger buildings and a yearly calculated non-renewable primary energy use before renovation lower than 200 kWh/m2.


There is a need to renovate the building stock with holistic tools and methods and with a common language between the stakeholders in order to achieve the EU energy and climate targets.

The development of holistic procedures and assessing the overall benefits from building deep renovation – regarding energy performance, confidence in the savings, high quality indoor environments, financial valuation – are needed to engage property owners and stakeholders on deep renovation pathways.

Energy rating & targets

More information in this video: Jana Bendzalova, ENBEE (Slovakia) click here

ALDREN EVC sets the conditions for a consistent benchmark of energy performance at EU level, based on an EU comparable scale with one reference point reflecting approximately the cost optimal level of energy performance. These measures ease the labour of financial institutions and offers the possibility to be linked to existing voluntary certification schemes.

Addressing the gap between calculated and actual Energy Performance (EP)

More information in this video: Robert Cohen, VERCO (UK) click here

ALDREN proposes the use of simulation models based on accurate descriptions of operations, targeting building´s energy performance. The results will be verified during the first year of operation through specific submetering systems.

Too deliver these goals ALDREN provides 2 key documents:

  • A design for testability protocol, which will be applied during each of the critical stages of renovation to ensure that the performance outcome achieves the design intent.
  • A performance verification tool, which facilitates the calculation of the performance gap before and after renovation, providing insight into any deviation from design intent.
Health & wellbeing

More information in this video: Pawel Wargocki, DTU (Denmark) click here

ALDREN defines an IEQ rating and the integration of benefits resulting from higher IEQ in the financial valuation of the deep energy renovation projects.

Linking EVCS to financial valuation

Financial valuation in the ALDREN project sets a framework to establish explicitly the link between the certified energy performance, wellbeing and IEQ and financial and economic indicators.

In particular, a focus has been made on:

  • the different types of economic and financial values and the different types of valuation and appraisal situations;
  • the different types of approaches to assess the financial and/or economic performance of energy efficient buildings, well-being and IEQ.
Building Renovation Passport

More information in this video: Marta Sesana, PoliMI (Italy) click here

Provides building information to the property owners, to the building stock managers who must deal with investment and renovation issues and to potential purchasers, investors, renters or building users.

Building passports have evolved over time and continue to evolve into a tool for communicating diverse buildings features to multiple beneficiaries in different European countries.

ALDREN BRP is the modular structure composed basically by two main elements:

  • ALDREN logbook
  • ALDREN roadmap

The ALDREN Logbook will be structured in 6 modules:

  • ML1 Building picture
  • ML2 Energy rating assessment
  • ML3 Operational energy performance
  • ML4 Comfort and wellbeing
  • ML5 Cost, value and risk
  • ML6 Documentation and BIM

While the ALDREN Roadmap will be structured in 3 modules:

  • MR1 ALDREN Renovation time-line
  • MR2 Elementary renovation action list
  • MR3 Elementary renovation action description


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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