Horizontal Ventilation: Should we be re-examining our tactics?
Jerry Knapp wrote an interesting article for FireEngineering about a 2010 UL labs test on ventilation and fire behavior.
His article directed the reader to the UL study.
If you take the time to go through the entire program, there are some serious eye opening conclusions about horizontal ventilation.
Please take some time to look at it and then comment.
Even if you skip to the 4 panel videos and then go through the tactical considerations section you will get the gist.
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06-20-2011, 03:57 PM #1
UL Study on Ventilation and Fire BehaviorA coward stands by and watches wrongs committed without saying a word...Any opinions expressed are purely my own and not necessarily reflective of the views of my former departments
06-20-2011, 05:29 PM #2
- Join Date
- Apr 2004
- Bossier Parrish, Louisiana
Some very neat stuff that I can definatly use in my reading smoke class when I talk about the fires of today v. the fires of yesterday.
When I have more time I will watch it in greater detail.Train to fight the fires you fight.
06-23-2011, 04:45 PM #3
- Join Date
- Aug 2007
I really didn't think there was much that was truly "ground breaking" information that would necessitate a significant "overhaul" of most department's tactics regarding horizontal ventilation. A lot of the information, to me at least, seemed to confirm and re-emphasize things we should already be aware of.
We already knew that ventilation closer to the fire is better than farther away and that the more distant location will "pull" the fire towards it.
We already knew that ventilation before being ready to apply water will cause the fire to grow.
We already knew that closing doors while searching (VES) helps to maintain conditions in that room while doing so.
We already knew that (wide) fog streams will absorb heat much faster than a solid/straight stream and that it will upset the thermal balance.
I think the more pertinent information to take from the study is just how short of time you now have to put water on the fire once you ventilate before conditions become untenable. Additionally, the information about how ventilation to remove smoke/heat may not always achieve that result and the notation of the front door as a ventilation point was pretty informative.
06-23-2011, 08:18 PM #4
Additionally, I've seen this lift and bank back down effect just before a flash.
I have a difficult time getting the point across adequately to my students and fellow FFs that control of the air flow is the difference between a manageable situation and a rapidly untenable one.A coward stands by and watches wrongs committed without saying a word...Any opinions expressed are purely my own and not necessarily reflective of the views of my former departments
06-24-2011, 12:24 AM #5
- Join Date
- Jun 2008
- RDU, NC
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