Which ventilation method relies on natural airflow?

Natural ventilation is a method that relies on the movement of air due to natural forces, primarily wind and thermal buoyancy. This approach takes advantage of variations in temperature and pressure to create airflow without the use of mechanical systems. In a fire situation, natural ventilation can be achieved by opening windows, doors, or other openings that allow fresh air to enter and smoke or heated gases to escape. This method is particularly useful in well-ventilated areas and can help increase visibility and reduce heat buildup during firefighting operations.

Understanding the mechanics of natural airflow is crucial for fire service personnel as it aids in the management of smoke and heat during emergency responses, ensuring safer and more efficient fireground operations. When comparing this to hydraulic, vertical, and forced ventilation methods, the reliance on mechanical means or specific deployment strategies differentiates natural ventilation distinctly, solidifying its role as an effective technique based on the existing environmental conditions.