Traditional architecture while energy consumption has not been defined as today, have utilized some passive design methods by attending to the potentials of the region and made them highlight. At hot climate such as Iran, one of the outstanding technical solution for providing ventilation, both for body and structural cooling, were already used in ancient times. Furthermore, other techniques had been applied for achieving comfort and controlling it, as main target, at night, day and each season. A fundamental idea of this approach is focusing on providing zero-condition. According on the improvement of technology and advanced tools and materials, backward to traditional design hints can offer new technical solution as regard the climate and it can be away for sustainability and sustainable design. In this paper, be mentioned to traditional passive design at hot climate and the methods which have been used especially for natural ventilation. The Iranian passive cooling wind-tower system which is called "Badgir" , is one of the techniques for ventilation at hot climate. In this way, by introducing it, we can refer the structure of some new methods to it. such as double skin facade which can be used in contemporary architecture design.
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