During occupied conditions, the mechanical ventilation system shall exhaust the larger of the following:
1. Not less than 0.5 cfm per square foot (0.0025 m
3
/s m
2
) of machinery room area or 20 cfm (0.009 m
3
/s) per person; or
2. A volume required to limit the room temperature rise to 18°F (10°C) taking into account the ambient heating effect of all machinery in the room.