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This contribution reports on an ongoing research effort within the project Sim4DLG (FFG 853842) to optimise the performance of life cycle oriented buildings in Austria. For a reduction of the heating demand and overheating risk in the cold and warm seasons respectively, a simulation-supported optimisation strategy was pursued. This approach is applied to a range of different building types, varying from stand-alone single family houses to townhouses and apartments in a multi-storey building, which are to be constructed within the project Life Cycle Habitation (LIFE13 ENV/AT/000741). To avoid overheating risk in the buildings and to increase the thermal comfort, the dimensions of external shading devices were investigated, especially in combination with summer-time natural ventilation. Apart from the exploration of the indoor environment of each building type, the heating demands of the buildings were specifically examined. This includes a comparison of the building parameters and simulation procedures as well as an evaluation of the outcomes and deviations of the simulation results in relation to the concurrently calculated mandatory Austrian energy certificate. The simulation results suggest that this strategy has not only the potential to improve indoor conditions, but also to result in better ratings in terms of the Austrian energy certificate.

Life-cycle oriented simulation-supported heating demand optimisation of buildings: An Austrian case study