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I. Kovacic:
"Building Performance evaluation - Assesing the Project Sustainability through Coherence Analysis of Sustainability Indicators";
Vortrag: Joint Fourth Scientific Conference on Project Management (PM-04) & the First IPMA /MedNet Conference - Project Management Advances, Training & Certification in the Mediterranean",, Chios, Greece; 29.05.2008 - 31.05.2008; in: "Proceedings of the Joint Fourth Scientific Conference on Project Management (PM-04) & the First IPMA /MedNet Conference - Project Management Advances, Training & Certification in the Mediterranean"", J. Pantouvakis (Hrg.); Chios, Greece (2008), ISBN: 978-960-254-677-2; Paper-Nr. seite 326, 6 S.

Austrian construction market is internationally leading in research and practice of low energy and passive house technology in the realm of construction of single family houses and housing blocks. With the recent increased requirements on the minimisation of national CO2- and greenhouse gas emissions by the European Commission, private as well as public investors have started showing increased interest in alternative concepts of heating, cooling and ventilation of buildings.
The first low energy office buildings have appeared, however most of them have been built for clients own use and the evaluation emphasis was exclusively on energetic performance. The aspects of:
. life-cycle cost performance,
. cost-benefit analysis in terms of income yields vs. initial investment,
. life-cycle resources consumption,
. total energy consumption for operation (e.g. lightning, cleaning etc.),
. demolition and land fill cost,
which are crucial evaluation-criteria for the performance of the office/public buildings, have not been evaluated.
The question rises, how can such buildings be profitable for investors; interested in sustainable rents or further sale (building as portfolio-asset), when the return of investment period is sometimes longer than 30 years through extremely costly façade (double façade) or HVAC technology; and how could these buildings be realised in terms of ecological, economic and social sustainability.
The building performance evaluation method presented in this paper provides a holistic approach to a building performance, and is assessing project sustainability already in the early planning phase - pre-design phase. It is based upon the description and evaluation of coherences between the life-cycle oriented indicators determining sustainability of a building/project, such as:
. Costs: construction cost, investment, life-cycle cost, yields
. Ecology: resources consumption (land, materials), emissions, demolition
. Energy consumption: manufacture, heating, cooling, ventilation, operation
This approach is opposed to the one-sided view of low energy/passive houses evaluation (as paradigms of sustainable building), where the emphasis of evaluation is laid on the energetic performance of the building elements; and is as such insufficient for performance evaluation of structures beyond family houses or housing blocks. .

Keywords
Sustainable building, indicators, low energy house, passive house, energy efficiency

Sustainable building, indicators, low energy house, passive house, energy efficiency

http://publik.tuwien.ac.at/files/PubDat_172502.pdf