What is the procedure when a sealed fire is recovered by direct ventilation?

When a sealed fire is recovered by direct ventilation, the recommended procedure involves breaking the seal on the intake side first, after which crews should explore the affected area before starting the ventilation process. This method ensures that personnel can assess the situation for any hotspots or potential hazards present in the environment. It allows for accurate evaluation of the fire's status and the potential for re-ignition, which is crucial for effective firefighting tactics.

By exploring the area prior to ventilation, crews can also identify any trapped individuals or obstructions, ensuring that the ventilation does not inadvertently worsen conditions or create additional risks. The focus on safety and situational awareness in this process maximizes the chances of successfully controlling the situation without compromising the safety of the responders or those they may be trying to help.