Abstract: Traditional buildings in Iran have employed some ingenious passive techniques especially in hot regions in order to restore thermal comfort and coordinate with the local environment and climate. One of these techniques that have been used in traditional housing of Dezful is Shavadan. The present study focused on traditional houses in historical context of Dezful to introduce the various components of Shavadan and analyses of its thermal performance. Results show that Shavadans have a constant temperature in the range of 21 to 24 °C throughout the year. In the presence of a proper air flow, Shavadan can be used as a source to reduce heating and cooling energy demands and as a result reducing the energy consumption of building.