Relative measure of the total amount of solar energy that enters a building space through a glazing system compared to the total amount of solar energy that enters a building through a single 1/8” clear glass pane.

The shading coefficient is the ratio between the total sun energy passing through a crystal glass and the total sun energy passing through a monolithic glass 3 mm. thick. The shading coefficient of a light glass mm. 3 thick, calculated with a solar radiation of 783 Watt for square meter is equal to 1.

Relative measurement of the total amount of solar energy that enters a building space through the glass, compared with 3mm single clear glass.

The shading coefficient is obtained by dividing the solar factor by 0.87, which is the solar factor of 3 mm clear float glass.

The amount of total solar energy that is transmitted to the interior by a certain application. This takes into consideration the screen and the glass materials as well as the location of the screen.

A window's ability to transmit solar heat gain, relative to the transmittance of a 3-mm, clear single pane of glass. The shading coefficient is given as a unitless value between 0 and 1; the lower the SC the less solar heat it transmits. (The shading coefficient is being replaced by the "solar heat gain coefficient" which gives the fraction of incident energy that enters the space (with a value between 0 and 1).

ratio of solar heat gain through a glazing system under a specific set of conditions to solar gain through a single light of the reference glass under the same conditions (related to total solar energy transmittance)

Provides a measure of the energy transferred through the glass when exposed to sunlight compared to the energy transferred through 3mm clear glass. If cooling is paramount, the lower the number the better.

The ratio of the total solar heat gain through a specific glass product or glazing system to the total solar heat gain through 3mm clear glass under the same set of conditions; often quoted in terms of ASHRAE (American Society of Heating, Refrigeration and Air-Conditioning Engineers) or standard weather conditions.

The ratio of solar heat gain through fenestration, with or without integral shading devices, to that occurring through unshaded 1/8-in.-thick double-strength glass.

The solar factor (total transmittance) of a glass relative to that of 3mm clear float glass (0.87) and is used as a performance comparison. The lower the shading coefficient number, the lower the amount of solar heat transmitted. The short wave shading coefficient is the direct transmittance (T) of the glass as a factor of the solar factor or total transmittance (g or TT) of 3mm clear float glass (T ÷ 0.87). The long wave shading coefficient is the internally re-radiated energy that the glass has absorbed as a factor of the solar factor (total transmittance) of 3mm clear float glass. It is determined by subtracting the direct transmittance from the solar factor (total transmittance) of the subject glass and then dividing by the solar factor (total transmittance) of 3mm clear float glass (g-T ÷ 0.87).

A measure of the ability of a window or skylight to transmit solar heat, relative to that ability for 1/8-inch clear, double-strength, single glass. It is equal to the Solar Heat Gain Coefficient multiplied by 1.15 and is expressed as a number without units between 0 and 1. A window with a lower Shading Coefficient transmits less solar heat, and provides better shading.

A measure of the ability of a window or skylight to transmit solar heat, relative to that ability for 1/8-inch clear, double-strength, single glass. It is being phased out in favor of the solar heat gain coefficient, and is approximately equal to the SHGC multiplied by 1.15. It is expressed as a number without units between 0 and 1. The lower a window's solar heat gain coefficient or shading coefficient, the less solar heat it transmits, and the greater is its shading ability.

The ratio of the solar heat gain through a given glazing system to the solar heat gain under the same conditions for clear, unshaded double strength window glass (DSA). Shading coefficient defines the sun control capability of the glazing system.

Decimal value which is the solar gain of a window, divided by the solar gain for a clear single-glass window of the same size. The shading coefficient of clear, double-glazing is about 0.85 to 0.9.

A measurement of the ratio of total solar heat tranmission of a particular glass type compared with 3mm clear glass: the % total heat transmission of the chosen glass, divided by 87.

The ratio of solar heat gain passing through window film to the solar heat gain that occurs under the same conditions if the window were made of clear, unshaded double strength window glass. The lower the number, the better solar shading qualities of the window film/glass system.

The ratio of solar heat that is transferred through a glazing material relative to the solar heat transferred through 1/8" clear glass. The lower the number the more efficient the window is at reducing solar heat gains.

The amount of solar energy or heat that is transmitted through a particular glazing system. It compares the effectiveness of specific glazing options to a single pane of 1/8" inch double strength clear glass in its ability to reduce solar heat gain. The shading coefficient of clear double strength glass is 1.0. A standard insulated glass unit has a SC value of about .87. The lower the shading coefficient, the lower the solar heat gain.

The ratio of the solar heat gain through a specific glazing system to the total solar heat gain through a single layer of clear double-strength glass.

A glass measurement comparing solar heat transmission, related to 1/8-inch clear glass. It is being phased our in favor of the solar heat gain coefficient, and is approximately equal to the SHGC multiplied by 1.15.

Shading coefficient is the ratio of solar heat gain through a specific type of glass that is relative to the solar heat gain through a 1/8" (3mm) ply of clear glass under identical conditions. As the shading coefficient number decreases, heat gain is reduced, which means a better performing product.

A measure a window's ability to transmit solar heat, relative to that ability for 1/8-inch clear glass. The lower a unit's shading coefficient, the less solar heat it transmits, and the greater its shading ability. It is being phased out in favor of the solar heat gain coefficient (SHGC).

The ratio of the solar heat gain through a specific glass product to the solar heat gain through a lite of 1/8" (3mm) clear glass.

A measure of window glazing performance that is the ratio of the total solar heat gain through a specific window to the total solar heat gain through a single sheet of double-strength glass under the same set of conditions; expressed as a number between 0 and 1.

Is the ratio of solar heat gain passing through a glazing system to the solar heat gain that occurs under the same conditions if the window were made of clear, unshaped double strength window glass. The lower the number, the better solar shading qualities of the glazing system.