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As mentioned above, this balance appears to assume no HVAC system and no infiltration or ventilation. Surface Inside Face Conduction Heat Transfer Rate is only valid for opaque surfaces, so this is missing conduction through the window which for this particular view of the heat balance should be Surface Window Inside Face Glazing Net Infrared Heat Transfer Rate. Plus, reflected solar and visible internal gains can leave through the window, so you need Surface Window Shortwave from Zone Back Out Window Heat Transfer Rate. And are all of the internal gains 100% radiant? If not then you also need Zone Total Internal Convective Heating Rate. If you haven't found this already, all of the output variables are defined in the Input Output Reference - search on the variable name.