What affects orientation of building?

Orientation of building offers maximum ventilation and natural light, provides comfortable living in house and saves energy bills as well. There are many factors that affect orientation of building. GharExpert has identified some of them which are following.

• Solar radiation and temperature: Intensity of solar radiation depends on the direction of sunrays. The temperature of a living space increases due to sun radiation and affects whole environment of the house. Solar radiation acts in two ways i.e. one is when sunrays directly come to the house through openings and the other is when radiation comes indirectly through walls and roof of building by absorbing heat.
• Prevailing winds: winds help create natural ventilation in a building and offer more comfort during high humidity. During orientation of a building and designing doors and windows openings, the direction of wind flow should be considered. Fix windows and ventilators at proper location in building to provide maximum air and light. Maximum air and ventilation can be obtained if the level of opening is at the level of occupancy.

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What are sources of daylighting?

Would you like to enjoy natural light or daylighting in your home? If yes, fix windows, ventilators, skylights etc. while designing building to get the benefit of daylighting. Daylighting creates productive environment for occupants and reduces 30 to 40 % of total energy costs. It depends on color of walls, ceiling and floors such as light color reflects more light than dark color.

Source of Daylight: The Sun is primary source of daylighting and the sunlight comprises following two parts.

• Direct solar light
• Sky radiation

Direct solar light is not taken into consideration during daylighting. Sky radiation is considered while designing daylighting in homes. The value of sky radiation depends on the position of the Sun defined by its altitude which changes with the change in altitude of the area throughout the year.

Daylight Factor: Daylight factor is the quality of daylight in a room. It is the ratio of outside illumination over inside illumination. The intensity of daylight in a room is subject to frequent fluctuations and harshness. It is found more or less constant when the sky is clear or overcast.

To know more about daylighting, its sources and daylight factors, click here.

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