What is the correct order of active desmoking steps?

• A. Prep path, Rig blower, Establish & maintain
• B. Rig blower, Prep path, Establish & maintain
• C. Prep path, Establish & maintain, Rig blower
• D. Establish & maintain, Prep path, Rig blower

Answer: (A)

Active desmoking relies on creating a controlled airflow path that safely removes smoke and toxic gases from the affected spaces. The first step is to prep the path: open and align the ventilation openings that will carry air through the space, isolate or close compartments to prevent crossflow, and remove obstacles that could block the airflow. This establishes a clear route for the air to travel.

Next, rig the blower at the correct location to drive air along that prepared path, connect any ducts, ensure the intake is in a clean area and the exhaust leads to a safe discharge, and verify the setup so nothing will interrupt the flow.

Finally, establish and maintain the ventilation: confirm the system is actually moving air, monitor pressures and flows, adjust dampers or controls as needed, and keep the airflow steady while coordinating with other firefighting actions. This sequence ensures that the desmoking effort is efficient, effective, and safe.