Question-and-Answer Resource for the Building Energy Modeling Community
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You should use energyplus docs for clarification:
Surface Window Heat Gain Energy [J]
The total heat flow to the zone from the glazing, frame and divider of an exterior window when the total heat flow is positive.
For a window without an interior shading device, this heat flow is equal to:
[Surface Window Transmitted Solar Radiation Rate (see definition, above)]
[Convective heat flow to the zone from the zone side of the glazing]
[Net IR heat flow to the zone from zone side of the glazing]
[Short-wave radiation from zone transmitted back out the window]
[Convection to zone from window frame and divider, if present]
