2019 - Daylight Symposium
"Impact of the New European Standard EN17037" by Bernard Paule
Co-founder and manager
The entry into force of the first European standard dealing with daylight is excellent news. For the first time a standard proposes a set of criteria to evaluate the main parameters related to natural light in buildings. This standard addresses the four following criteria:
• Daylight provision
• View out
• Exposure to sunlight
• Protection from glare
For each of these criteria, the EN 17037 Standard defines three levels of performance: Minimum, Medium and High. The Standard specifies that the level of performance can either be evaluated via a simplified approach or a detailed analysis. The objectives set by this standard in terms of daylight provision are ambitious and have consequences on the design of buildings and architecture. This presentation will give the results of a parametric study aimed at demonstrating in a concrete way the influence of the main design parameters on the performance levels that can be achieved with respect to this standard.
Based on simulations conducted with the DIAL+ software, the study mainly focuses on the Daylighting Provision criterion and looks at the respective influence of the following parameters:
• Localization (latitude)
• Outdoor environment (obstruction angle)
• Glazing transmission
• Window to floor ratio
• Indoor photometry
• Type of shading device
In addition, this presentation will highlight the differences that are observed depending on whether the simplified calculation method (based on daylight factors) or the detailed method (based on dynamic simulations) is used. In order to illustrate the results of the parametric study, this presentation will also show some real case-studies and will test them with the requirements of the European standard. This work makes it possible to question the objectives set by the standard and to give a good idea of the targets that can be reasonably achieved in day to day practice.
Bernard Paule is co-founder and manager of Estia SA. The company, located on the EPFL campus, is offering services in building-physics and sustainable development in architecture. After studying architecture at Ecole d’Architecture de Lyon (F), he finalized his PhD at EPFL in 1999, dealing with the application of fuzzy logic rules in the daylighting decision process. In parallel with its consulting activities in daylighting and building energy efficacy, he is regularly involved in research activities (IEA tasks, European & Swiss Projects). Co-author and designer of the DIAL+ software, Bernard PAULE is part-time lecturer at the Swiss Federal Institute of Technology (EPFL).