At the Zone level of the tree, Mechanical tab you have specified that the ventilation will come from the HVAC system. The code does not permit the use of the HVAC system as a source of ventilation, you must provide a dedicated ventilation system to ventilate a Hirise Residential Occupancy.
This could be an exhaust fan, a supply fan, or a DOAS system.
At the Zone level of the Building Tree, in the Mechanical tab, choose Zone Ventilation Fan as the source of ventilation and input the Airflow and motor watts for the Exhaust Fan, or include a DOAS system to provide the ventilation.
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