What is one disadvantage of using positive-pressure fans in firefighting?

Using positive-pressure fans in firefighting has various advantages, particularly in ventilation efforts; however, one significant disadvantage is the potential to spread the fire if the fans are not used correctly. This can happen when the airflow created by the fan inadvertently pushes hot gases and flames towards unburned areas or additional fuel sources. If the temperature and conditions are not properly assessed, the intense airflow can lead to increased fire spread, posing additional risks to both the firefighters and any occupants or surrounding structures.

Firefighting strategies must ensure that positive-pressure ventilation is applied effectively and in conjunction with a thorough evaluation of the incident scene. This helps to minimize the risk of unintended consequences, such as exacerbating the situation rather than controlling it. Being aware of this disadvantage emphasizes the need for training and situational awareness when utilizing such equipment in emergency scenarios.