JCE_V1_N3_CS1 Dhananjay S. Patil Shridhar S. Kumbhar Journal on Civil Engineering 2249 - 0779 1 3 23 30 Passive cooling, Wind tower, Ventilation System Buildings account for an estimated 30 percent of the total energy consumption in India. Furthermore, the absolute figure is rising fast due to booming real estate demand and increasingly affluent lifestyle across various sections of society. In India, there are several showcase buildings such as a solar passive house in hot arid zones in India (Bansal and Minke, 1995) and a passive-cooled building for semi-arid zones (Srivastava et al., 1984) using wind tower, earth berms and evaporative cooling systems. Studying 3 cases where natural ventilation system has replaced/reduced use of mechanical cooling and saved energy. A wind tower is designed for a school building as overcrowded, poorly ventilated classrooms contribute substantially to the spread of infectious diseases, such as colds and influenza. Designed wind tower is for 2 classrooms with capacity of 40 students and area of 72 sq. m. resulted duct sizes for inlet and outlet are 0.20 sq. m. and 0.062 sq. m. respectively. June - August 2011 Copyright © 2011 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=1684