The SHGC of the fenestration product shall be calculated using the following equation:
Equation NA6-2
SHGCT = 0.08 + (0.86 x SHGCc)
Where:
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 4.5.1.1 http://www.nfrc.org/software.aspx