Positive Pressure Ventilation (PPV) is a firefighting technique used to remove smoke, heat, and toxic gases from a building. This method involves using fans to create higher air pressure inside the structure, pushing out the contaminated air. By doing so, it helps improve visibility and conditions for firefighters and any trapped occupants. PPV is typically employed during structural fires and is most effective when used in conjunction with other firefighting strategies. It can also aid in controlling the spread of fire by directing airflow, which helps to limit the fire's access to oxygen.