PPV fans can be considered useful in which type of incidents?

PPV fans, or Positive Pressure Ventilation fans, are specifically effective in situations where chemical gases or smoke needs to be expelled from a structure to ensure safety. In the context of a chemical warfare incident, the primary goal is to remove harmful airborne contaminants and create a safer environment for both victims and responders. Using PPV fans helps to ventilate toxic fumes, diluting them and preventing the accumulation of dangerous concentrations within enclosed spaces.

In other scenarios, such as fires, earthquakes, or floods, the application of PPV fans may be less critical or even ineffective, as the primary concerns in those situations often differ, such as structural integrity or water management. Therefore, the utility of PPV fans is most pronounced in scenarios where hazardous materials are present and where controlling air quality is essential for safety and rescue operations.