What is the primary purpose of using positive pressure ventilation in firefighting?

The primary purpose of using positive pressure ventilation in firefighting is to force smoke out of the building. This technique involves using fans to introduce fresh air into a structure, which creates a pressure differential. As fresh air is pushed into the building, the smoke is displaced and expelled through openings, clearing the environment for firefighters and improving visibility. This method enhances safety for both occupants and responders, allowing for a more effective firefighting operation.

While other options may relate to aspects of firefighting and fire behavior, they do not describe the main objective of positive pressure ventilation. Cooling the fire is generally managed through direct firefighting tactics rather than ventilation techniques. Creating a vacuum effect is not applicable in this context, as the goal is to exert positive pressure rather than negative pressure. Reducing visibility is a concern during a fire, but the implementation of positive pressure ventilation specifically aims to improve visibility by removing smoke from the scene.