A consultant specifies the required U-value, solar heat gain coefficient, and visible light transmittance for...

TheU-value (thermal transmittance), Solar Heat Gain Coefficient (SHGC), and Visible Light Transmittance (VLT)are all key metrics used to evaluate theperformance of windows and other glazing materialsin the building envelope.

U-valuemeasureshow much heat is transferred through a window assembly, impacting thermal insulation and energy efficiency.

Solar Heat Gain Coefficient (SHGC)determineshow much solar radiation is transmitted through glass and converted into heat, affecting cooling loads.

Visible Light Transmittance (VLT)indicatesthe percentage of visible light passing through the window, influencing daylighting and glare control.

These attributes arecrucial for windowsas they directly affectenergy performance, occupant comfort, and daylighting strategiesin a LEED-certified building.

(Source: Official LEED BD+C Reference Manual)