We are designing a TV studio that has two ventilation zones; 1) Stages, studios and 2) Auditorium for seating areas within the TV studio.  There is a dedicated single zone, recirculation AHU serving this studio. The AHU will serve both areas and be VAV airflow but will not have VAV terminal units.  Can the multizone 62.1 calculation be used since there are different ventilation zones per the definition in 62.1-2016? Or does the single zone 62.1 calcluation need to be used?