Based on global warming, decline of existing energy resources, exponential population growth, increasing geopolitical instabilities which are the result of uncertainty of the future energy supply, together with the fact that buildings represent about 40% of total energy consumption worldwide leads to a conclusion that a good architecture is not possible without a good energy concept.


    The buildings represent the bigger part of one of the biggest problem of our society - fair distribution of available resources. Therefore architecture can be a big part of the solution. Never before in the history of our civilization architecture had such a chance to gain one of the central roles in the society. Good architecture is always representing the expression of the cultural values, priorities and hopes of a society. Now it can produce a physical response for the existential challenges.


    A sustainable development by definition cannot get along with the decay in architectural quality of our built environment. A building with low architectural quality and good energy concept is not an actual benefit for a sustainable future. The objective of research and teaching at the Institute is the maximization of energy performance of buildings and cities, and the development of architectural and urban projects through form and structure optimization toward energy efficiency.

  • TEAM

    Head of the Institute

    Brian Cody



    consultation-hour - wednesday 11:00 - 12:00


    Project Assistant/Lector

    Sebastian Sautter



    Martin Schneebacher


    Student assistant


    Office hours

    Monday - Friday, 09:00 - 12:00



    Aleksandar Tepavcevic

    consultation-hour - friday 11:00 - 12:00



    Alexandru Dan


    Student assistant



    Christiane Wermke



    Minoru Suzkuki


    Student assistant



 / E

Assessment architecture competition headquarter Steweag-Steg, Graz

Prof. Brian Cody

Andreas Ampenberger




Fields of reference

Building Performance



The Institute for buildings and energy was commissioned, to evaluate the energy efficiency of design concepts of the architecture competition for the headquarter of energy supplier STEWEAG-STEG GmbH in Graz. Within the framework of a restructuring, the client decided to refurbish a 1960s high rise building at Leonhardgürtel and expand the location by another 150 work stations. As a result of the consultancy, the STEWEAG-STEG GmbH was able to assess a number of different designs with respect to their energy efficiency and comfort. Amongst others, the assessment of the designs included the impact of the position and orientation on the site, the impact of the building form on the energy balance, the optimal design of the fassade as well as addressing the question as to what extend natural ventilation is possible. Apart from the assessment of energetic aspects of the submitted design proposals as part of the framework of the architecture competition, different alternative strategies for the refurbishment of the office building were evaluated as well. The breakdown of the energy demand and their individual causes yields many surprising causes for most clients as well as planners. This knowledge, however, is precondition, to reasonably assess the relevance of individual aspects. It was particularly noted that most of the planning teams efforts focused on energetic improvements in terms of reducing heat losses during the winter period by means of upgrading the insulation standards. However, results of dynamic computer simulations showed, that an additional insulation of the opaque wall surfaces only have a minor impact towards the overall energy demand and considering the tight budget for the project, strategies should to be looked for to achieve the highest potential benefit with the same effort.



September 2006 – October 2006



Cody, B.: „Energieeffizienz in Gebäuden“, in: VDI Berichte 2034, Fassaden - Blick in die Zukunft, VDI Verlag, Düsseldorf, Deutschland, 2008


Cody, B.: „Energieeffiziente Sanierung von Büroobjekten am Beispiel STEWEAG-STEG“, Forschungsjournal der Technischen Universität Graz SS 07, Graz, Österreich,2007, ISBN 1682-5675


Cody, B.: „Energieeffizienz versus Energieverbrauch“ Denken in Systemen, in: Zeno 3/2009, München, Callway



More info: tug online

copyright - Institut für Gebäude und Energie , TU Graz, 2016