NA6.3    Default Solar Heat Gain Coefficient, SHGC

The SHGC of the fenestration product shall be calculated using the following equation:

Equation NA6-2

SHGCT = 0.08 + (0.86 x SHGCc)


SHGCT = SHGC Is the Total Performance of the fenestration including glass and frame

SHGCC = Center of glass SHGC calculated in accordance with NFRC 200 Section