What should firefighters do when using PPV regarding openings?

When utilizing Positive Pressure Ventilation (PPV), it is crucial to provide openings on the windward side of the structure. This approach allows for the efficient flow of fresh air into the building, enhancing the effectiveness of the ventilation process. By creating openings on the windward side, firefighters capitalize on the natural wind direction to push smoke and heat out of the leeward openings, thereby improving visibility and safety for both victims and responders inside the structure.

This method not only facilitates the removal of hazardous smoke and gases but also helps in pressurizing the interior space, which can reduce the risk of backdrafts and flashovers by controlling the environment. Properly managing air flow is essential in ensuring that the building is ventilated effectively, while also maintaining firefighter safety. This strategy aligns with best practices learned during firefighting training regarding the dynamics of fire behavior and airflow.