... the exploitation of sunlight for daylight and passive solar heating is as long as the history of building itself. Passive solar design is a form of building techniques which when combined with basic energy conservation and energy efficient practices utilizes natural elements to create light, heat, cooling whilst reducing the need for artificial mechanisms. Building energy efficiency is a function of, the passive capacity of the building to achieve comfort and habitability without relying on energy input. It is the warming effect produced naturally by the absorption of solar radiation on landscape elements, building materials, room surfaces and furniture and or on human skin. It also increases the comfort of buildings and makes dramatic reductions in energy costs. Passive solar heating, daylighting, natural ventilation, radiative and ground- coupled heating and cooling, and peak- load shifting with thermal mass are included amongst such strategies. This means daytime lighting should be 100% ...

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