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* SHGC can be expressed in terms of the glass alone or can refer to the entire window assembly. | * SHGC can be expressed in terms of the glass alone or can refer to the entire window assembly. | ||
* The lower a window's SHGC, the less solar heat it transmits. | * The lower a window's SHGC, the less solar heat it transmits. | ||
For incident radiation that is diffuse, the hemispherical SHGC must be used | * For incident radiation that is diffuse, the hemispherical SHGC must be used. | ||
[[http://www.daviddarling.info/encyclopedia/S/AE_solar_heat_gain_coefficient.html]] | |||
[[http://resourcecenter.pnl.gov/cocoon/morf/ResourceCenter/article//93]] | |||
''ASHRAE Handbook 2005 Fundamentals'' | |||
Version vom 3. Februar 2009, 11:41 Uhr
Glossary: WUFI-Plus
Solar Heat Gain Coefficient
- The Solar Heat Gain Coefficient (SHGC) measures how well a window blocks heat from sunlight. The SHGC is the fraction of the heat from the sun that enters through a window, both directly transmitted, and absorbed and subsequently released inward.
- The SHGC replaced the shading coefficient an the standard indicator of a window‘s shading ability
- SHGC is expressed as a number between 0 and 1.
- SHGC can be expressed in terms of the glass alone or can refer to the entire window assembly.
- The lower a window's SHGC, the less solar heat it transmits.
- For incident radiation that is diffuse, the hemispherical SHGC must be used.
