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Fire Dynamics: Challenges to Implementing PPA: Q&A

American Fork (UT) Fire & Rescue Chief Kriss Garcia recently conducted a Webcast entitled "Challenges to Implementing PPA." Here are his responses to some questions asked during the presentation. Q. So the more or bigger opening is better? A. More is better if they are in the fire area through non-survivable exhausts. If you don't have 2-3 that is where we start. You will know if you have ample exhaust to use positive pressure attack (PPA) by the area above the fan. If heavy smoke that does not clear comes back towards the fan you should adjust by making more exhausts. The faster you can remove smoke and temperature from the building the better. You can figure out how to g...

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