However, due to limitation of layout efficiency, cost effectiveness, security, and fire requirement, most of the building designed has single-sided ventilation solution. Cross ventilation strategy is considered as the ideal in order to enhance the thermal performance.

An effective passive design strategy for building is necessary especially in hot and humid climate in Malaysia. In Malaysia, 70% of the electricity consumed is for cooling load.

In order to reduce energy consumption, effectiveness of natural ventilation performance in building should become major consideration in design. Ventilation is one of the important criteria to achieve thermal comfort in building.