Klimaaktiv (Austria), Version 2020


Austria has a governmental environmental rating system called Klimaaktiv, which uses the methodology published by IBO (Österreichisches Institut für Baubiologie und -ökologie) called Ökoindex 3, which is proprietary to IBO and not an open system. Klimaaktiv is a national environmental assessment method for building materials. It includes  a weighted score of GWP, primary energy depletion, and acidification potential with a fixed scale of performance. The materials assessment is a mandatory part of the certification. A total of 1000 points can be achieved through this system based on four categories – location, energy & supply, building materials & construction, and comfort & health. Performing well in this certification can make residential buildings eligible for an additional environment-related subsidy. This certification has been applied to over 500 buildings as of 2020.

Six of the nine Austrian states have applied Ökoindex 3 to their housing subsidy mechanisms alongside energy-related performance and features. For example, in Tirol the embodied impact performance improvement is translated into cash using a scoring scheme, whereas in Vorarlberg, performance improvements release a 35-year low-interest loan.

The sub-section C.4.1a addresses life-cycle assessment using the Ökoindex 3 index. The lower the value of the Ökoindex 3 for a building, the less non-renewable energy is used, and fewer greenhouse gases are emitted in the manufacturing, construction, and maintenance of the building. 0 to 60 points can be assigned to achieve the fixed scale requirements, which is 40% of the total points assigned to the category of building materials & construction as aforementioned.

The Okoindex OI3 assesses the ecological quality of all materials based on the environmental indicator’s global warming potential, acidification potential and the need for non-renewable primary energy. The Ökoindex OI3 can be calculated for building materials, parts of a construction, and entire buildings.

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