Question-and-Answer Resource for the Building Energy Modeling Community
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You may want to start with the 16x US DOE Commercial Prototype Models - the ZIP files contain the IDFs. Those models are often the basis for a wide range of assessments (in the US and elsewhere), namely to evaluate/compare contributions from various vintages of ASHRAE 90.1 and IECC. Likely adaptations will be required to suit the European context.
My reply should not be considered as a definitive answer (there are lots of models out there), but it is an answer. Good luck!
