Natural Daylighting

Daylighting is often very compatible with natural ventilation.
The provision of adequate light is a key requirement for occupied buildings, and there is much benefit to be gained through exploiting the benefits of natural daylight. Firstly, it can lead to reduced electricity usage; and secondly, there are variations in sunlight levels over the course of a day which can be beneficial to occupants, especially if potential issues with excessive amounts (glare) or insufficient lux levels are overcome through careful design. However, the provision of natural daylight can lead to admission of solar gain into a space. There are solar films that mitigate this effect to some degree, but nevertheless, it is still an issue that designers need to consider. The main challenges of solar gain typically exist in summer, when it is desirable to keep the building cool and minimize the heat gain. In contrast, cold winter days can present a heating challenge and solar gain can be of benefit to the building. Because the sun is at its highest in summer and its lowest in winter, appropriate external shading can maximize benefits in winter while avoiding direct incident on glazing in summer.

Energy Efficiency Improved Indoor Environmental Quality Reduced Capital Cost Reduced Maintenance Natural Daylighting Increased Range of Thermal Comfort LEED® and CHPS® Points