Passive cooling by night ventilation in a residential building in the hot arid regions of Iran with a large diurnal fluctuation in ambient air temperature is analyzed theoretically. A transient simulation is performed for a building with four different rooms in a typical city close to the central desert of Iran.
For a building at 31.9Β°N latitude with windows on four sides and various continuous ventilation rates, the rooms on the east side have nearly similar air temperature and the rooms on the west have nearly the same air temperature. Closing the windows on east and west sides resulted in similar air temperature variations for all the rooms.
Appropriate selection of night ventilation during the cold period of night and during the day reduced room air temperature substantially during the day and resulted in air temperature variations within an acceptable range of thermal comfort.