The method of fast calculation of ventilation rate through an opened vertical window was studied. This procedure compared using CFD analyses with predictions of zonal models and produced simplified procedures, based on the charts and non-dimensional groups [11].
A simulation study [14] on thermal comfort and building performance of naturally ventilated 10-storey apartment block in the Klang Valley had opening schedules for external windows and balcony doors as follows:
Closed daytime, open overnight.
Open daytime, closed overnight.
Open at all times.
Closed at all times.