How to model in E+ pressurized corridors in multi-unit residential buildings?

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I am modelling an old 4-storey MURB; 1970s- 80s. Air distribution is very important so Airflow Network is utilized. Heating- central hydronic with baseboard heaters and cooling- local with window AC units for each zone (no ducts). Rooftop Air Handler is to deliver pressure to all corridors, keep them pressurized with door undercuts to allow the air flow into the units. I would appreciate the info on how to best model the AHU, ducts to corridors and the corridor air pressure.