Austria - HoHo high-rise wooden building (in Vienna)

Austria´s building sector is implementing multi-layer wood-based construction houses since the mid 90´s. In light of climate change adaptation, efforts towards energy efficiency increased on a national level and gained momentum via the Austrian climate protection initiative "klimaaktiv" that aims to introduce and promote climate friendly technologies and services. It is embedded in the federal climate strategy and fosters market transformation towards energy efficient products and services. The klimaaktiv building standard is the guiding principle for environmental and energy-efficient design throughout Austria. Several buildings have been assessed via the klimaaktiv standard and allow for comparison along sustainability dimensions, bridging current state of knowledge, practical applications and the legal framework. The case study will build upon the climate protection initiative and related standards in order to develop and apply the benchmarking extension of ToSIA. Focusing on innovative construction projects, current sustainable building will be analysed in detail: "HoHo Vienna" sets out for a benchmark of high-rise buildings based on wood construction in Europe, with 24 floors and 84 m in height. It will be built according to the new "total-quality building" assessment system (Austrian Sustainable Building Council), safeguarding the documentation and certification from planning to construction to use. The Life Cycle Tower One in Vorarlberg was designed to passive house standards and uses prefabricated building modules, with the core of the prefab system being a post and beam construction that supports concrete slab. Synthesizing the data available and embedding additional data collected during the project lifetime from similar cases will form the basis for benchmarking new, wood-based hybrid buildings against fossil-based alternatives.

Subcontracting: BOKU has earmarked funds for subcontracting of experts from companies for data collection.

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