Clarification on Surface Outside Face Temperature Output Values

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Hello everyone,

I ran a simulation of my model and set the Surface Outside Face Temperature of a wall named Int_Wall as the output. I obtained two values, which are highlighted in yellow, corresponding to the iz-INT_WALL area and green corresponding to the INT_WALL area.

In EnergyPlus InputOutputReferance the Surface Outside Face Temperature is defiened as the temperature of the surface’s outside face which in my case is the INT_WALL area, but what is the iz-INT_WALL area ?

Thank you.