What is the recommended action to manage the HVAC system during salvage operations?

What is the recommended action to manage the HVAC system during salvage operations?

• A. Leave HVAC running to ventilate smoke.
• B. Open all doors and vents to maximize airflow.
• C. Isolate HVAC, seal ducts or remove and clean, and prevent cross-contamination to other spaces.
• D. Disconnect main power and ignore the ducts.

Answer: (C)

Controlling cross‑contamination by the HVAC system is essential in salvage operations. The HVAC can circulate smoke, soot, moisture, and odors to spaces that aren’t yet affected, spreading damage and contaminants. The recommended action is to isolate the system: shut it down, seal the ducts or remove and clean them, and take steps to prevent cross‑contamination to other spaces. This containment helps keep unaffected areas clean, protects contents, and reduces secondary damage.

Leaving the system running would push contaminants into clean areas. Opening all doors and vents creates uncontrolled airflow that can spread contamination widely. Simply disconnecting power and ignoring the ducts leaves air movement unchecked and doesn’t address the pathway contaminants use through the building.