Hi Michele,
I think that to enable evaluation of such effects, and reporting of relevant variables, you should use the HAMT (or EMPD) algorithm in the HeatBalanceAlgorithm class (set CombinedHeatAndMoistureFiniteElement in the Algorithm field). An example on how to set-up a model using the HAMT algorithm can be found in the EnergyPlusVx-x-x\ExampleFiles folder (search for the HAMT_HourlyReportProfile.idf).
Regards,
Georgios