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The conventional method in EnergyPlus is the use the ZoneMixing object to move air between zones. OpenStudio does not expose this object, but you could add ZoneMixing directly to the idf using an OpenStudio Measure. https://github.com/NREL/OpenStudio/wiki/Measure-Writing-Guide#5-energyplusmeasures--edit-idf-files-directly

EnergyPlus will not balance your exhaust fans with infiltration for you. If you want that you have to add the infiltration objects yourself. If you have an AirLoopHVAC based system serving the zone, EnergyPlus will decrease the return air from the zone to maintain continuity. To prevent this behavior or to balance the flow yourself with an infiltration object you need to set the Balanced Exhaust Fraction Schedule Name.

The conventional method in EnergyPlus is the use the ZoneMixing object to move air between zones. OpenStudio does not expose this object, but you could add ZoneMixing directly to the idf using an OpenStudio Measure. https://github.com/NREL/OpenStudio/wiki/Measure-Writing-Guide#5-energyplusmeasures--edit-idf-files-directly Measure.

Or just refer to this question like Amir said.

With respect to the exhaust fan. EnergyPlus will not balance your exhaust fans with infiltration for you. If you want that you have to add the infiltration objects yourself. If you have an AirLoopHVAC based system serving the zone, EnergyPlus will decrease the return air from the zone to maintain continuity. To prevent this behavior or to balance the flow yourself with an infiltration object you need to set the Balanced Exhaust Fraction Schedule Name.