European Directive (EU) 2018/844 amending Directives 2010/31/EU (EPBD) and 2012/27/EU (EED) aims at decarbonizing the European building stock. Energy efficiency measures and renewable energy use play an important role, especially regarding retrofit of existing buildings. Identification of retrofit opportunities and aggregation of projects to benefit from economy of scale are a precondition for the implementation of large-scale renovation projects. The ENERFUND project, funded by the HORIZON 2020 programme, provides data from Energy Performance Certificates according to EPBD publicly available in the form of a map and combines them with other geo-referenced data and general information to allow for the rating of deep renovation and carbon reduction opportunities. In this way, the tool assists in identifying retrofit opportunities and aggregation of projects for financing. It also assists in supply-side energy spatial planning, because it shows where energy consumption is likely to decrease due to economic renovation potentials. This contribution shows an overview of data available for thirteen European Member States. Data sources and differences regarding the type of data are explained, and challenges such as data quality issues and data protection concerns are discussed. It is demonstrated that the ENERFUND tool certainly assists in decarbonizing the European building stock, although some improvements are still necessary.

Successful design and construction processes aiming towards nearly zero energy building (nZEB) standards are a challenge for the whole construction industry in Europe. Realizing nZEB buildings requires innovative design processes, and technologies based on an integrated design approach facilitated by multidisciplinary work teams. The collaboration between architects, engineers, technical experts and building managers, is essential. Therefore, it is necessary to identify the specific involvement of each profession in order to develop mutual understanding of each others' disciplines. Additionally, it is vital to provide professionals with the skills needed to achieve optimal nZEB construction and retrofitting in terms of quality, energy efficiency and cost effectiveness. However, this approach is not yet common, as the building sector is still very fragmented. The EU-funded H2020 project PROF/TRAC aims to tackle this issue by developing an Open Training Platform and a methodology for fast and valid co-creation of interdisciplinary qualification schemes for task-based Continuous Professional Development (CPD) for all professions involved. A common methodology for the mapping of skills and qualifications in the form of an Excel tool was developed as a basis, together with a guidance document. This paper presents the skill-mapping methodology, the use of its results to develop national roadmaps, and the BUILD UP Skills advisor app.

The 2030 climate and energy framework includes EU-wide targets and policy objectives for the period 2021–2030 of (1) at least 55% cuts in greenhouse gas emissions (from 1990 levels); (2) at least 32% share for renewable energy; and (3) at least 32.5% improvement in energy efficiency. In this context, the methodology of the cost-optimal level from the life-cycle cost approach has been applied to calculate the cost of renovating the existing building stock in Europe. The aim of this research is to analyze a pilot building using the cost-optimal methodology to determine the renovation measures that lead to the lowest life-cycle cost during the estimated economic life of the building. The case under study is an apartment building located in a mild Mediterranean climate (Castellon, SP). A package of 12 optimal solutions has been obtained to show the importance of the choice of the elements and systems for renovating building envelopes and how energy and economic aspects influence this choice. Simulations have shown that these packages of optimal solutions (different configurations for the building envelope, thermal bridges, airtightness and ventilation, and domestic hot water production systems) can provide savings in the primary energy consumption of up to 60%.

RESUMENLa cooperación internacional es un componente intrínseco de los procesos de innovación y desarrollo. Además de un modelo de cooperación, las redes constituyen un modelo organizativo para el fortalecimiento institucional, para la articulación de los sistemas nacionales de innovación y para la internacionalización de los mismos. Asimismo, durante los 10 últimos años ha habido un incremento de Living Labs en Europa, vinculados a la innovación, que están formando una creciente comunidad canalizada a través de La Red Europea de Living Labs. Con el objetivo de conocer el estado del arte y las necesidades futuras de las redes de Living Labs se han analizado las redes existentes, siendo el objetivo principal el intercambio de mejores prácticas y lecciones aprendidas. La armonización y la integración de herramientas y métodos entre los socios es otro de los objetivos de cooperación. Finalmente, un tercer objetivo es que entre los socios de los diferentes laboratorios se desarrolle una investigación a mayor escala. Se requiere una mayor estructura organizativa para resultados colaborativos y de investigación a mayor escala, las redes son aún jóvenes.Palabras clave: living lab, red, cooperación, innovación y desarrollo, red transfronteriza. ABSTRACT International cooperation is an intrinsic component of the processes of innovation and development. Besides a model of cooperation, networks are an organizational model for institutional strengthening, for the articulation of national innovation systems and for the internationalization of them. Likewise, during the last 10 years there has been an increase of Living Labs linked to innovation in

Energy efficiency is priority number one in the EU in the last two years and efforts to achieve it have been made in various ways: through regulations, guidelines, good practice results, education and training. The buildings sector still is the larger consumer of energy, so many policies and national energy strategies have prepared ambitious goals to significantly decrease the sector’s energy consumption. An important step for the implementation of these strategies is the detection of the potential to energy renovate the existing building stock. This is the objective of this study; to present the ENERFUND tool which displays the current energy performance of a group of buildings and pinpoints the energy renovation potential for the selected buildings. An extensive study to identify the expectations of the future users was carried out, which provided valuable feedback for the features of the tool. The tool utilizes data from publicly available Energy Performance Certificates in the form of an interactive web map and combines them with other geo-referenced data and general information to allow for a rating of deep renovation opportunities. The paper explains the various features of the tool, and presents typical examples of the tool use for targeted stakeholder interests.