Wössner, S.S.WössnerErhorn, H.H.ErhornBoer, J. deJ. deBoerErhorn-Kluttig, H.H.Erhorn-Kluttig2022-03-102022-03-102005https://publica.fraunhofer.de/handle/publica/349101en624690IEA ECBCS Annex 36: Energy concept adviser for technical retrofit measuresconference paper