The chart below illustrates energy conservation for identical buildings located in each of the major U.S. Cities listed for one full year, when compared to no window shades. As you can see, utilizing appropriate solar shading can save from approximately 15% to 75% on cooling costs depending on the location and climate, and on what fabric is chosen.
This simulation was performed with several constants:
- Fabric: 5% Basket Weave fabric is a charcoal color. 5% Duplex fabric is a charcoal/white color.
- Solar shading: The horizon is presumed to be at a vertical level of 5°. No other obstacles or buildings are taken into account.
- Glazed surface in facade(s): 50% of the facade total surface. U-value of glazing: 2.9 W/m²K (i.e. 0.15˝ or 4 mm glass).