What is positive-pressure ventilation?

Positive-pressure ventilation is a firefighting technique used to improve indoor air quality by introducing fresh air into a building. This method involves using a blower or fan to create a positive pressure inside the structure, effectively pushing the smoke and heat out through designated openings, such as windows or doors.

By blowing fresh air in, this technique helps to clear smoke, heat, and toxic gases, allowing for a safer environment for both firefighters and any occupants who may still be inside. The influx of clean air not only diminishes the concentration of harmful smoke and gases but also enhances visibility and improves conditions for fire suppression efforts. Therefore, this approach is vital during firefighting operations to support effective rescue and extinguishment tasks.

In contrast, the other methods listed do not align with the principles or goals of positive-pressure ventilation, as they focus either on removal of smoke or moving combustion products in ways that are less effective or not beneficial for firefighting operations.