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IEA SHC Task 47 Symposium "Renovation of Non-Residential Buildings towards Sustainable Standards"

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Buildings are responsible for up to 35% of the total energy consumption in many of the IEA participating countries. The EU Parliament approved in April 2009 the Energy Performance of Buildings Directive (recast) that asks Member States to set intermediate goals for existing buildings to become nearly zero-energy buildings by 2015 and 2020.

A few exemplary non-residential renovation projects have demonstrated that total primary energy consumption can be drastically reduced together with improvements of the indoor climate. Because most property owners are not even aware that such savings are possible, they set energy targets which are too conservative. Buildings renovated to mediocre performance can be a lost opportunity for decades.

The objectives of IEA SHC Task 47 are to develop a solid knowledge base on how to renovate non-residential buildings towards the NZEB standards in a sustainable and cost efficient way and to identify the most important market and policy issues as well as marketing strategies for such renovations.

The purpose of the symposium is to present the main outcome of the task. International experts will present results from their work. Expected participants are professionals from the building industry, researchers and government representatives.



Mese Frankfurt, Exhibition "Light + Building 2014"

Hall 4.2, Room "Dimension"

Ludwig-Erhard-Anlage 1

60327 Frankfurt am Main, Germany


Duration of symposium: From 10:00 - 16:00


The event language is English, simultaneous German translations of the presentations will be provided.

For registered attendees, participation in the symposium is free of charge. We kindly ask you to register before 28 March 2014 at the latest (see event flyer including registration template).



  • Renovation of non-residential buildings towards sustainable standards: Overview of the IEA SHC Task 47 (Fritjof Salvesen, Aspen Viak, Norway)
  • Important lessons learned from 20 European exemplary retrofit projects for non-residential buildings (Fritjof Salvesen, Aspen Viak, Norway)
  • The challenge of retrofitting historic buildings - Examples from Vienna and Graz (Claudia Dankl, ÖGUT - Österreichische Gesellschaft für Umwelt und Technik, Austria)
  • Deep retrofit of older office buildings: Lessons learned and recommendations (Kirsten Engelund Thomsen, Danish Building Research Institute, Denmark)
  • Powerhouse Kjoerbo - Office buildings renovated to plus-energy standard (Marie Lyseid Authen, Asplan Viak, Norway)
  • Overview and evaluation of market and policy issues for the retrofit of non-residential buildings (Trond Segel, Segel AS, Norway)
  • Lunch
  • How to achieve high daylighting quality in retrofitted non-residential buildings
  • Cross-comparison of retrofitted European buildings and recommendations (Roman Jakobiak, UG, Germany)
  • Retrofitting German school buildings to achieve the energy performance standards of plus-energy schools and 3-liter building schools (Johann Reiß, Fraunhofer Institute for Building Physics)
  • Successful retrofit of non-residential buildings: Technical analysis of heating and cooling concepts (Doreen Kalz, Fraunhofer Institute for Solar Energy Systems, Germany)
  • Design guideline for sustainable refurbishment of school buildings (Sophie Trachte, Architecture et Climat, Belgium)
  • Summing Up


Fraunhofer Institute for Building Physics
Contact Name:
Andreas Reith
Contact Email: Contact Phone:
+49 (0)711 970 3399
Source Language: