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Engineering ToolBox > Radiant Heat through Windows
Heat gain from sun radiation through windows can be controlled with shades and blinds.
| Type of Shading | Transmitted Solar Energy (%) | Reflected Solar Energy (%) | Absorbed Solar Energy (%) |
| Single or double glass without shading | 75 - 80 | 10 - 20 | 10 - 20 |
| Vertical Blinds | 5 | 40 - 60 | 35 - 55 |
| Venetian Blinds | 0 | 23 | 77 |
| Roller Shades | < 25 | 15 - 80 | 20 - 65 |