double counting of airflow?

• came across while working on something else
• and unsure if it was intended
• but isn't this below double counting? so for like FCU DOAS, FCU airflow gets added to the zone_hvac_total_mass_flow_kg_s and DOAS airflow gets added to the air_system_total_mass_flow_kg_s. but that air from DOAS goes to FCUs. so I felt like this might be double counting.

https://github.com/NREL/ComStock/blob/7198d82540d5c1131ccccb6739224a181f9b9f2d/measures/comstock_sensitivity_reports/measure.rb#L1333