Does EN 17037 refer to any specific building types?
Section 5.3 describes assessment of exposure to sunlight, and is the only part of the standard to offer some building-specific guidance. It says that at least one habitable space in dwellings, hospital patient rooms and nursery playrooms, should be provided with the minimum performance level for sunlight exposure.
While access to sunlight is generally desirable, over-exposure can be detrimental to health and wellbeing, as well as contributing to excessive solar gains and uncomfortable internal temperatures. This unique example of building-specific guidance within EN 17037 is an acknowledgement that, in certain situations, building users need a ‘calmer’ space that does not achieve the levels of sunlight set as medium or high performance.
Does EN 17037 require specific levels of illuminance?
When it comes to daylight provision, the standard only gives levels of illuminance in terms of the minimum, medium and high performance levels that are a feature of the document. It does not specify levels for particular tasks or building uses.
The minimum level of 300 lux is based on a number of studies, having been described as suitable illumination for prolonged office work, and the level at which the probability of switching on electric lighting is low. Design levels for artificial lighting also use a 300 lux threshold.
Again, this leaves the designer free to aim for higher levels where certain building uses require it, and where specified by guidance particular to that building type.
Velux Commercial specialises in offering daylight solutions for commercial buildings including, offices, education buildings and hospitals. Contact us to find out how our products can improve daylighting in your project, or find out more about why this standard was created.