Environmentally Controlled Window Shade
Window shades and blinds can save money. Blinds can reduce heat gain from a window by as much as 45% in the summer (U.S. Department of Energy). Also, as an example, 1,300 kWh/m2 of heat come through south facing windows in Laramie, WY each year, assuming every day is sunny (Sustainable by Design). The average cost of a kWh in the U.S. in August, 2016 was 12.90 cents (U.S. Department of Energy, 2016). Using these numbers, the energy savings from effective window blind use could be as much as $75.47 per square meter of window per year. For buildings with very large windows, these costs can add up. ...
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