Uncomfortable glare and thermal conditions, as well as veiling reflections and high contrast ratios, are examples of unfavorable conditions that can be created by poor daylighting. The benefits of introducing daylight into a space can be negated by improper handling of the daylight being introduced. In addition, with proper solar control, solar gains during cooling load periods can be mitigated and solar gains during heating load periods can be utilized, reducing the energy requirements of both cooling and heating a space. These psychological benefits can easily justify any extra design effort or added expense associated with introducing controlled daylight into buildings.ĭaylighting, with proper electric lighting controls, can result in significant energy savings by reducing electric lighting loads and associated cooling loads. Exposure to daylight has also been shown to improve general health and circadian rhythm. A number of research studies, a few of which are listed below, have shown a variety of benefits of daylighting in different building types and functions, among them improved retail sales in big box stores, increased worker productivity and reduced absenteeism in office buildings, improved student educational performance in K–12 schools, and improved patient recovery times in hospitals. Good daylighting has been shown to improve the overall attitude, satisfaction and well being of building occupants. The two primary reasons for using daylight to meet the illumination requirements of an architectural space are the psychological benefits and the energy savings benefits. How can an architect design for good daylighting: that is, what design and analysis tools and “ daylight “ products are available and how are they best used / integrated to create an effective daylighting system? Why? The Benefits of Daylighting When during the architectural design process should daylighting be considered? How can a designer best integrate daylighting design into the architectural design process? What is good daylighting design and what is bad daylighting design? What strategies and approaches can lead to good daylighting designs, and what issues should a designer be concerned about?
Why design buildings to use the abundant daylight available at the site? What are the potential benefits of an effective daylighting design?
This part of the Daylighting Primer addresses the intricacies of what constitutes good daylighting design, and outlines a general design methodology that considers the many factors involved in good daylighting design. The dynamic nature of daylight, throughout the day and throughout the year, poses numerous challenges when designing buildings that seek to utilize this abundant natural resource to meet the illuminance requirements of architectural spaces.
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