What is an important consideration when using PPV fans?

Using Positive Pressure Ventilation (PPV) fans is a critical tactical decision during fire operations. An important consideration is that these fans can create excess pressure in the structure they are operating in. This excess pressure can lead to unintended consequences such as pushing the fire and smoke toward uncontrollable areas or even backdraft situations if not managed properly.

When utilizing PPV fans, it's essential for fire personnel to assess the structural integrity and the conditions within the building to ensure that the positive pressure created does not exacerbate the situation. This includes understanding the layout of the building, the location of the fire, and the presence of any occupants. Proper coordination and strategic placement of ventilation can maximize efficiency and minimize hazards.

Understanding the dynamics of how PPV fans affect airflow and pressure can significantly influence the safety and success of fire attack strategies.