A guide for the building of daylight scale models

Scale models are frequently used to evaluate daylighting performances of buildings. In order to get accurate results, there are several rules to respect for building these scale models. Some of these rules are universal and others depend on the measurement and observation devices, the type of sky under which the study is carried out and the objectives of the study. This paper, based on the authors experience and on a literature review, presents rules to respect when building a mock-up for daylighting studies. These rules are illustrated by project examples that were tested under the Belgian artificial skies (Single-patch sky and sun simulator, Mirror box and Mechanical sun).