Which equipment is primarily used for ventilation during firefighting operations?

Positive Pressure Ventilation (PPV) fans are specifically designed for use in firefighting operations to effectively ventilate a space by introducing a high volume of air under positive pressure. This technique helps to push smoke, heat, and toxic gases out of the building, thereby improving visibility and conditions for firefighters inside. Using PPV allows for strategic management of airflow and enhances the overall safety and efficiency of firefighting efforts.

These fans can create a pressure differential that assists in controlling the environment, making it easier to locate and combat the fire. Although electric fans and exhaust fans may also contribute to ventilation in certain situations, they do not achieve the same level of effectiveness in pushing out smoke and heat as PPV fans do. Air conditioning units, on the other hand, are not designed for firefighting ventilation and are generally used for cooling rather than for managing smoke or heat in a fire environment.