Void

We proposed a new design of an affordable apartment with a closed-vertical void to improve the indoor natural ventilation especially for the leeward side of the building and constructed a full-scale experimental house in Indonesia in 2020. This paper analyses the effects of the proposed ventilation system through field measurements in the experimental house. In the experimental house, the vertical-closed void with a width of 2.85 m was designed between the two rows of units.

In this present study, annual exceedance probability (AEP) analysis was applied as the method forassessing wind-driven natural ventilation in a street canyon, in which the effects of wind approachingfrom each direction were comprehensively taken into account. In order to evaluate the overallventilation performance in specific domain spaces within the street canyon, local air change rate andaverage kinetic energy were employed to calculate the AEP, instead of using the commonly adoptedvelocity ratio.