PPA Deconstructed UL FSRI experiments reveal the value of ventilation

摘要

Positive pressure attack (PPA) has been used by the fire service for more than 30 years, but many still have questions regarding its value on the fireground. "While almost every apparatus has a fan on it, PPA is still a very polarizing tactic. Some see it as dangerous to add thousands of cubic feet per minute (cfm) of air into a potentially occupied fire building, while others see it as negligent not to attempt to control the flow path inside a fire building by keeping a fan at your back. "While both of these views are a little nearsighted, they speak to the fact that we need more information on PPA.