Abruptly 40% of the world has hot-humid climate. In hot-humid climate, the wide span of temperature and humidity cause architectural designers a huge trouble to design a non-air conditioned built environment, if they have to design to provide optimum thermal comfort throughout the year. Therefore, from the ages, in every civilization, it has been an eternal challenge for designers, to design a thermally comfortable built environment for the climatic condition. In 1980s with the invention of mechanical ventilation the world changed; it erased the history- old architectural research to search...