In my thesis I analysed the illuminance of an open office space using software Rhinoceros and the ClimateStudio plug-in. I analysed the effect of the size and shape of window openings on the illuminance of a room. The thesis deals with four sizes of window openings with three different types of glazing, double pane glazing, triple pane glazing and solar control glazing. I compared the results with the values in the regulations and standards to check whether the target daylight factor required for the specific work tasks was achieved in the room. In addition, I also analysed glare probability. I have found that increasing the size of window openings improves the daylighting of a room, but also increases the chance of disturbing glare. Glare is the most disturbing in the spring and autumn months around noon, when the sun is highest in the sky. The most critical positions are near window openings with views facing to the window. To a certain extent, the occurance of disturbing glare can be reduced by using the right type of glazing with lower light transmission. In fact, the percent share of hours of intolerable glare was reduced by 50 %, when I used larger opening with solar control glazing compared to when I used double glazing with the same area of glazing.
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