The new European Standard for daylight design covers four different areas:
- Daylight provision
- Assessment of the view out of windows
- Access to sunlight
- Prevention of glare
Some designers may already have familiarity with designing to provide daylight, but the other three aspects of design significantly extend the scope of the standard.
This blog post provides an overview of these four areas, as an introduction to the contents of the standard.
Daylight provision, or illuminance levels, allow users to carry out tasks and play a part in determining the likelihood of artificial lighting being switched on. Assessment can be via either climate-based modelling or daylight factor calculations.
Assessment of the view out of windows
Building users should have a large and clear view of the outside. EN 17037 considers the width and outside distance of the view, as well as landscape ‘layers’ (sky, landscape and ground). The view should be perceived to be clear, undistorted and neutrally coloured. Width of view can be established via a detailed or simplified approach. Outside distance and number of layers are each measured by a single approach.
Access to sunlight
Calculating access - or exposure - to sunlight is a comfort and health factor for users of dwellings, nurseries and hospital wards. Daily sunlight exposure can be established through detailed calculation or table values.
Prevention of glare
As its name suggests, prevention of glare is concerned with removing the probability of glare for building users, especially those who do not choose where they sit. It uses a detailed calculation of daylight glare probability (DGP) or a standard table of values for sun-screening materials.