Hoffmann, CarolineGeissler, AchimHuber, Heinrich2016-10-272016-10-272016-10-10http://hdl.handle.net/11654/23417https://doi.org/10.26041/fhnw-784A thorough building refurbishment generally includes window replacement and thermal insulation of the opaque building envelope. However, quite often only a window replacement is done and the building envelope is left uninsulated. This could lead to mould problems, because of the reduced air change. A possible solution can be the integration of passive window ventilation openings (PWVO). This paper deals with two questions: Firstly, can PWVO guarantee the necessary ventilation rate to avoid moisture damage? Secondly, how do PWVO compare to a ventilation system with heat recovery in terms of heating demand?entransient thermal simulationspassive window ventilation openingsmould600 - Technik624 - Ingenieurbau und Umwelttechnik690 - Hausbau, Bauhandwerk04B - Beitrag Konferenzschrift203-212