Final answer:
Emergency ventilation fans are initially controlled by the OCC, but the FD takes control once they arrive. The FD must ensure the fans are functioning properly and adjust them to maintain desired air movement and pressure.
Step-by-step explanation:
In emergency situations, the operation control center (OCC) has the initial control over the emergency ventilation fans. However, as soon as the fire department (FD) arrives, they take control of all the fans. There are two important things that must be done when the FD takes control:
- The FD must ensure the emergency ventilation fans are functioning properly and providing adequate ventilation to the affected area.
- The FD must adjust the fans to create and maintain the desired air movement and pressure within the area.