Do they use the wide cone to get at the source of oxygen from the edges? Regardless, firefighting is such a dirty, risky, and involved operation. Hats off to them.
Depending on the nozzle setting, the hose is used as both "sword" and "shield" in the fight.
That's what I've read. That's how they can starve a fire by moving the air away with the cone.
The cone actually reverses the direction of airflow. The flashover is an over pressure condition coming out. The cone creates a pressure condition going in when it covers the whole opening. While they are pushing air into the flashover, they are adding water (steam) to cool the thermal layer at the top. Even during training, this is scary as shit and hot as hell. Like climbing out of the flames and jumping into a steamer.
Not for the meek, that's for sure.
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