LAST OCTOBER WE POSTED AN INTERESTING online interview with Franck Gaviot Blanc, a research scientist in France who specializes in fire behavior and is also a volunteer firefighter. You can re-read that interview in Firegeezer HERE.
Franck has sent us a request to pass along to the Firegeezer readers hoping that you will be able to assist him in his current project.
You will recall that he was talking about what he calls “under ventilated” fires, or you may perhaps recognize them as exhibiting backdraft conditions. But to make sure you are on “the same page,” he also sent his definition of an “under ventilated” fire. In his words:
Under-ventilated fire is a fire that has burned up more fuel than air up to that fuel. This is the case in most local fires. The problem is the smoke, as a firefighter in this smoke with his equipment can enter to search for the victim, or extinguish the fire. But if the firefighter enters a room where there is a fire under ventilated, and he is not careful to keep this under-ventilation (example, shutting the door against his hoseline once he is inside), then the firefighter is trapped because it will let the air enter into the room. And then the fire will grow. This spread is pretty fast and it’s called a flashover induced by ventilation. The under ventilated fire needs air to get totally developed and then firefighters with fans, or when they enter inside a burning building, will bring this air.
This video exhibits what he is referring to. You will recognize the conditions:
Now for today’s request ….
I’m looking for information concerning the water flow rate used by the first attack line for treating an under ventilated fire requiring the commitment of a crew inside a structure to put out the fire or search / save victims in your country (Sweden, Belgium, Germany, Australia, USA etc.).
Please specify if the system used is High or Low pressure system.
Thank you very much for your help.
Franck.
Just post your answers in the Comments section and Franck will read them there. Thanks.






















































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