What is the output variable for heat transmitted through a wall, to compare a wall with and without PCM?

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Hello everyone,

I am modeling a building in EnergyPlus and comparing two wall constructions: a reference wall without PCM and the same wall with a PCM layer (using MaterialProperty:PhaseChange with the CondFD solution algorithm). My goal is to evaluate the insulation effect of the PCM by comparing the heat transmitted through the wall in both cases.

I could not determine which output variable is the right one for this purpose, and I would like to make sure I am reading the correct quantity.

My questions are:

Which output variable represents the heat actually transmitted through the wall into the zone, so that I can compare the two constructions?

Any advice on best practice, or pitfalls when interpreting these results with PCM, would be greatly appreciated.

Thank you in advance!