Bild: Bautafel der Wohnhaussanierung "Tschechenring"

HEROES - Houses for Energy- and ResOurce Efficient Settlements

A simplified method will be developed for the calculation of environ­mental indicators for so far not considered building elements (eg. constructions, which are not thermally relevant and HVAC-components). The theoretical principles for the calculation of the primary energy demand and the CO2-Emissions for operating and raising a building will be harmonized.

Short Description




Starting point / motivation

For nearly 20 years, the calculated heating demand of a building is considered in several subsidy programmes. Since 2008, the mandatory energy pass shows the energy demand for thermal heating, hot water and electricity of buildings.

The so called OI3 index evaluates the non-renewable primary energy demand, the global warming potential and the acidification potential of the materials used for raising a building. However, due to reasons of simplification the consideration remains so far limited to the thermal building envelope. Essential parts of the building (such as cellars, HVAC) remain unconsidered.

The theoretical principles for the calculation of environmental indicators during the lifespan of a building and the construction phase are different. Therefore they can't be compared and optimized together.

Contents and goals

Through default values for so far not covered building elements, the evaluation of all relevant building elements will be possible with minimal effort. Planers, architects, etc. are set to the position to create more comprehensive building analysis which also can be considered in subsidy programmes and certification system (e.g.: klima:aktiv).

The methodological principles for the calculation of primary energy demand and CO2 emissions for different life phases of a building are harmonized. With a consistent method for evaluation of the use-, the construction- and maintenance-phases of a building, the building can be optimized over the whole life cycle.


Existing ecologic reference values are revised in order to harmonize the methodology for calculating the ecological indicators for the energy demand during the lifespan and the materials used for the construction of the building.

Different building types, components and HVAC systems are analysed. Consequently the default values are derived for those building elements, which are not considered so far.

The results of the project are clearly documented and presented in various workshops and lectures.

Expected results

Default values for building elements, which are not part of the thermal building envelope and values for HAVC systems will be published. These values allow a comprehensive evaluation of buildings with minimal effort. The values will be easily available for all planers, architects, etc. without any costs.

Project Partners

Project Management

Energieinstitut Vorarlberg

Project- or cooperation partners

Contact Address

Energieinstitut Vorarlberg
Stadtstrasse 33
A-6850 Dornbirn
Tel.: +43 (5572) 31 202

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