Standardised approaches and products

Standardised approaches and products for the systemic retrofit of residential BUILDings, focusing on HEATing and cooling consumption attenuations

The total floor area of residential buildings in the EU-28 is approximately 18 billion m2, 15 billion m2 of this is estimated to need heating to ensure comfort conditions. Heating needs are quite uniform all over Europe, amounting to around 140-170 kWh/m2 yr final energy consumption, compared to around 25 kWh/m2 yr in DHW consumption.

Cooling consumption is an issue only in the southern countries, where it generally ranges between 30 and 50 kWh/m2 yr.

In absolute terms, heating consumption in the residential sector in Europe arrives at around 2300 TWh/yr, DHW consumptions reaches 500 TWh/yr, while cooling consumption is less than 100 TWh/yr

From this picture, it is clear that heating demand needs to be addressed most urgently.

Nonetheless, a solution that covers both aspects and avoids a future increase of cooling loads in absolute terms is more attractive.

Since the replacement rate of the existing stock is very small (1-1.5 % per year), the solutions have to be focused on existing building retrofitting.

Therefore, this sector offers a unique opportunity for sustainable business and social growth if:

  • 1.Efficient, systemic (tackling envelope and HVAC systems renovation) and easy-to-implement solutions 1. are elaborated, allowing renovated buildings to approach the net-zero-energy standard and, at the same time, enhancing both comfort and healthiness conditions.
  • 2.Efficient, reliable, non-intrusive and cost-effective technologies are readily made available on the market, facilitating the implementation of the systemic solutions.
  • 3.Large investments are mobilized both from the public and private sectors, covering renovation costs that rarely can be borne by single private owners.
  • 4.Information and coherence about available solutions is brought into the market, facilitating the decision-making and planning processes.

Project Objetives

  • Elaborate systemic packages for the deep rehabilitation of residential buildings, at affordable prices.
  • Develop innovative technologies facilitating the implementation of the renovation measures.
  • Develop financial tools enabling large public and private investments to be mobilized.
  • Involve the construction chain from the very beginning and all along the building life cycle.

ACCIONA´S main rol within the project:

  • Coordination of the façade system design that integrates solar panels, high-reflective cladding panels, mechanical ventilation with heat recovery and a standardized sub-structure that allows the anchoring of all this elements.
  • Lab-tests to validate the façade system.
  • Manufacture and supply the high-reflective cladding panels to be installed in the demo buildings.


  • Acciona Infraestructuras: 504.125 €
  • Project total: 9.136.073 €

Project lifetime

01/September/2015 - 31/August/2019 (48 months)

Partners consortium

    • EURAC (Accademia Europea Bolzano) - COORDINATOR
    • SITI (Istituto Superiore sui Sistemi Territoriali per L’innovazione)
    • CLIVET (Clivet S.P.A.)
    • YOURIS ( GEIE, Belgium)
    • NEMET (Nemetschek Allplan Systems GmbH)
    • PINK (Pink GmbH)
    • AIRRIA (Greencom development s.c.r.l)
    • ACCIONA 
    • SCHNEIDER (Schneider Electric S.P.A)
    • NEXT ENERGY (EWE-Forschungszentrum für Energietechnologie e.V.)
    • ARUP (Ove Arup & Partners International Limited)
    • RIGENERA (Riqualificazione, Gestione Nuove Energie per il Residenziale e l’Ambiente)
    • MIG (MIG Material Innovative Gesellschaft mbH)
    • CIRCE (Fundación CIRCE)
    • ZAVI (Sociedad Municipal Zaragoza Vivienda S.L.U)
    • USAL (The University of Salford)
    • SALIX (Salix Homes)

Project website

Financing entity

This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 680658

Other innovation of energy efficiency in construction

All of our projects