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.

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.

I'm not sure how to link to previous posts, but the question "How to model transfer air in EnergyPlus" has already been asked and answered.

I am using OpenStudio 1.4 to model the HVAC system of a multi-story office building. The cooling requirements of the spaces on each floor are served by AHUs (for office spaces) and FCUs (for common areas). Fresh air or makeup air is provided by rooftop AHU units with heat pipe to the AHUs and spaces with FCUs to meet the ventilation requirements.

I understand that this configuration can be implemented in EnergyPlus using the AirTerminal:DualDuct:VAV:OutdoorAir object for the AHUs and AirTerminal:SingleDuct:SupplySideMixer object for the FCUs but these objects are not yet available in OpenStudio.

My question is if there is a workaround to set this up in OpenStudio and perhaps complete the setup in EnergyPlus if necessary. My point is to do the connections in OpenStudio which is easier to do than in EnergyPlus. Suggestions will be most appreciated.

Perhaps you could use export function?

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jean luc boeuf val d oise