Window blinds as a potential energy saver: a case study. Building science series (final). [Effects of building orientation]

Window usage at the National Bureau of Standards was studied by photographing venetian blind positions in offices at different times of the day and year, and the results suggest that energy conservation programs which rely on the activities of building occupants may be feasible.

Abstract

Window usage at the National Bureau of Standards was studied by photographing venetian blind positions in offices at different times of the day and year. While blind positions were quite stable during the week of each study phase, they were quickly altered by the room occupants when deliberately set at extreme positions by the researchers. Significant differences were observed among blinds depending on compass orientation of the window, view type, season, and nature of experimental treatment. The greatest determinant of blind position was orientation, with blinds on north-facing windows being more open than on the south. The results suggest that energy conservation programs which rely on the activities of building occupants may be feasible. Suggestions are made for improvements in blind use and design.