Recently there was an increasing demand in the field of sports facilities especially in 
the Middle East region. As a result, more attention is drawn toward reducing energy 
consumption in such facilities located in hot arid areas. Due to the large number of 
occupants inside covered sports halls, they work as a heat sink during the occupied 
periods. This article aims to study the effect of using night ventilation on reducing 
covered sports halls energy consumption. The methodology includes analyzing 
literature reviews related to sports facilities to study the effect of envelope 
modification on enhancing energy performance. DesignBuilder and EnergyPlus
softwares are used to build and study a covered sports hall model and investigate the 
effect of using night ventilation on hall number one of the Cairo sports halls complex.
Results show that night ventilation in hall number one positively reduces energy 
consumption by 18 %