In which situation should trench ventilation be utilized?

Trench ventilation is particularly effective in situations involving long, narrow structures. This technique is designed to remove smoke and heat efficiently from such spaces, allowing for better visibility and improved conditions for firefighting operations. When extending ventilation along the length of a confined area, trench ventilation helps to direct the smoke and heat toward designated openings, thus enhancing overall airflow and enabling a more effective firefighting strategy.

In contrast, multi-story buildings typically require vertical ventilation strategies, while wide, open areas can usually be managed with simpler ventilation tactics. Confined spaces often necessitate different ventilation considerations altogether, focusing on safety and removing hazardous gases. Therefore, trench ventilation is specifically suited for long, narrow buildings where controlling smoke movement is crucial for both effectiveness and safety.