solar factor, <of glazing material>

total transmittance, <of glazing material>

total energy transmittance, <of glazing material>

g

quotient of the quantity of heat penetrating into an interior through the glazing and the solar radiant energy incident on that glazing

Note 1 to entry: The solar factor is the sum of two quantities: the radiant transmittance, τ_e, of the glazing and the quantity equal to the quotient of the convected and radiated heat gain from the glazing into the interior, Q₂, and the solar radiant energy, Q₁, incident on the glazing:
g = τ_e + Q₂ / Q₁.

Note 2 to entry: The solar factor has unit one.

Note 3 to entry: This entry was numbered 845-09-106 in IEC 60050-845:1987.

Note 4 to entry: This entry was numbered 17-1199 and 17-1322 in CIE S 017:2011.