Which device uses airflow to assist in fire suppression by pushing smoke out of a building?

The device that uses airflow to assist in fire suppression by pushing smoke out of a building is a PPV (Positive Pressure Ventilation) fan. This fan creates a positive pressure inside the structure, which helps to force smoke and heat out of the building through designated openings, thereby improving visibility and conditions for both firefighters and any occupants who may still be inside. By removing smoke, the PPV fan also helps to reduce the risk of flashover and allows for more effective firefighting efforts.

While other devices like smoke fans and ventilation fans are involved in managing smoke and airflow in general, they do not specifically focus on creating the positive pressure necessary for effectively pushing smoke out during a fire incident. Exhaust blowers may serve a similar function but lack the focused pressure application of a PPV fan. Therefore, the PPV fan is specifically designed for this critical function during firefighting operations.