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Technical Definitions |
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Total Solar Energy Rejection (TSER) |
The percent of total solar energy (heat) rejected by a glazing system. (It equals the solar reflectance plus the part of the solar absorption that is re-radiated outward) |
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Visible Light Transmission (VLT) |
The percent of total visible light that passes through a glazing system. |
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Ultraviolet (UV) Radiation Rejection |
The percent of total ultraviolet light that is prevented from passing through a glazing system |
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Total Solar Absorption (TSA) |
The percent of incident solar radiation that is absorbed by the glazing system |
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Total Solar Reflectance |
The percent of total visible light that is reflected by a glazing system. |
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Emissivity |
The measure of a surface's ability to absorb or reflect far-infrared radiation. The lower the Emissivity the higher the far-infrared reflection and the better the insulating qualities of the glazing system for heat loss in the winter. |
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Shading Coefficient |
The ratio of solar heat gain passing through a system to the solar heat gain that occurs under the same conditions if the windows were made of clear double strength window glass. |
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All values as applied to double strength, single pane clear glass
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All of the data were obtained from typical production materials and are subject to normal manufacturing tolerances. All the values given are intended for design purposes only.
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Information on test methods is available upon request.
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Total solar energy is either Reflected, Absorbed, or Transmitted. All of which equals 100%. |
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