What should be extinguished before using thermal fog?

What should be extinguished before using thermal fog?

• A. Keep all lights on.
• B. Disable alarms only.
• C. Shut off building security systems.
• D. Turn off smoke alarms and ventilation systems.

Answer: (D)

Thermal fogging creates a dense, heated insecticide plume that can easily set off smoke detectors and be carried by HVAC systems. Turning off smoke alarms helps avoid false alarms during the treatment, and shutting down the building’s ventilation prevents the fog from being drawn into ducts or blown into other areas, helping to keep the treatment contained where it’s applied and reducing exposure to people and non-target spaces. After the fogging is complete, alarms and ventilation can be restored according to label directions.

Thermal fogging creates a dense, heated insecticide plume that can easily set off smoke detectors and be carried by HVAC systems. Turning off smoke alarms helps avoid false alarms during the treatment, and shutting down the building’s ventilation prevents the fog from being drawn into ducts or blown into other areas, helping to keep the treatment contained where it’s applied and reducing exposure to people and non-target spaces. After the fogging is complete, alarms and ventilation can be restored according to label directions.