ABSTRACT
In almost every climate, control of direct sun penetration is a key design criterion in order to avoid unwanted heat gain and excessive glare. This chapter presents a case study, which is a one-story school building designed by BOORA Architects. This pattern sequence highlights simulations under sunny sky and overcast sky conditions during September at noon with workplane illumination data represented in lux. It is important to consider the result of design alternatives under both conditions since increased fixed shading can reduce glare under sunny conditions but also reduce daylight availability under overcast conditions. Since fixed shading devices are usually permanent, it is important to understand effects under overcast sky conditions as well. The opaque overhang reduces the floor area above 300 lux from 50" to 40" under overcast sky conditions. The opaque lightshelf reduces the floor area above 300 lux from 40" to 30" under overcast sky conditions.
