consumption and emissions estimated to get double and triple by the mid- The basic idea behind the passive design concept is that a building should obstruct the outdoor climatic extremes to negatively impact the building. The building envelope, therefore, must filter the incoming solar radiations to penetrate inside the building. The excessive solar radiation entering the building can cause over-heating inside the building especially in the hot climates like that of Lahore. As far as building envelope is concerned, fenestration area is very important as it acts as a point of exchange between the outdoor and indoor climatic conditions. In an earlier study, a detailed analysis was conducted to investigate the role of orientation and glass type in the climate of Lahore using computer simulation for fenestration parameters. A critical limitation of this previous study was the lack of consideration of shading devices as a parameter of fenestration.  century. The major factors responsible for this increase is urbanization and affluence especially in developing countries . In developing countries like Pakistan, the building sector is responsible for 50% of energy consumption, the maximum as compared to other sectors like transportation, agriculture, industry etc. . The reason for this huge energy consumption is that buildings are being designed and constructed ignoring the local climatic conditions thereby needing huge amount of energy to attain thermal comfort level. Buildings can be designed to achieve thermal comfort with low energy consumption. This goal can only be achieved by designing buildings according to passive design principles. The role of architect or designer should be, therefore, to avail the renewable energy sources (wind, solar) to fulfil the demand for heating, cooling and lighting in buildings  . The role of shading devices in reducing the thermal gains inside the building is very important. It is an acceptable reality that penetration of daylight inside the building produces a beneficial effect on occupant health and also increases their productivity. T he appropriate shading has ability to filter the incident solar radiation and allowing daylight with reduced solar gain inside the building. 1 The current world is confronting three major challenges including population explosion, reduction of valuable resources and environmental deterioration. The population of the world has been multiplying at an alarming rate. Urbanization is taking place all over the world. The human race has caused exhaustion of the precious natural resources to fulfil their needs and this has resulted in the deterioration of the environment. It can be concluded that the above-mentioned problems have arisen due to human activity on the planet.
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- Summer '20
- Dr joseph
- Climate Change, World energy resources and consumption, Passive solar building design