“…This decision was made, because visual performance of a venetian blind is gradually changing by decreasing the slat of louvers (Mahdavinejad and Mohammadi, 2016). Venetian blinds with lower slat of louvers are more effective in controlling glare risk (Mahdavinejad et al, 2016). Since, controlling glare in Sweden is a difficult task (Bülow-Hübe, 2007); (Dubois, 2001), this study analyses two venetian blinds where the slat of the louvers is 0° and 45° as lower and upper margins.…”