What does hydraulic ventilation use to create airflow?

Hydraulic ventilation specifically employs water spray to create airflow and enhance smoke and heat removal from a structure during firefighting operations. This technique involves directing a stream of water into the burning area, which generates a negative pressure that helps draw out smoke and hot gases. The cooling effect of the water also aids in protecting firefighters and improving visibility, making it easier to tackle the fire and conduct rescues.

Using water in this manner is especially effective in situations where traditional methods of ventilation may be inadequate or unsafe, as it can also help reduce the temperature and improve conditions within the space. While fans, natural wind, and mechanical pumps are all components of ventilation strategies, they do not utilize water spray to facilitate airflow, setting hydraulic ventilation apart as a distinct and effective method in firefighting scenarios.