SHGC describes what?

SHGC describes what?

• A. Amount of solar radiation transmitted through glazing
• B. U-value
• C. Thermal inertia of frame
• D. Temperature difference across glass

Answer: (A)

SHGC describes the amount of solar radiation that actually contributes to indoor heat through a window. It includes both the portion of sunlight that passes directly through the glazing and the portion absorbed by the glass and surrounding materials that is later released indoors as heat. The value ranges from 0 to 1, with lower numbers meaning less solar heat gain and higher numbers allowing more. This is different from U-value, which measures how quickly heat transfers through a window due to a temperature difference, not solar radiation.

SHGC describes the amount of solar radiation that actually contributes to indoor heat through a window. It includes both the portion of sunlight that passes directly through the glazing and the portion absorbed by the glass and surrounding materials that is later released indoors as heat. The value ranges from 0 to 1, with lower numbers meaning less solar heat gain and higher numbers allowing more. This is different from U-value, which measures how quickly heat transfers through a window due to a temperature difference, not solar radiation.