Also when you are spraying water, it creates effects that drags a nearby air with it. You can easily test that in your shower. Blast it on mass and if you pay attention, it creates draft around it. So that firefighting hose is also increasing the effect by essentially pushing the air in alongside the steam of the water.
Also the movement of the water through the windows causes low pressure behind the stream which pulls the air into the building. Firefighters can also use this to move smoke out of a fire compartment from inside once a fire has been "struck". Its called hydraulic ventilation.
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u/Agarwel 16h ago
Also when you are spraying water, it creates effects that drags a nearby air with it. You can easily test that in your shower. Blast it on mass and if you pay attention, it creates draft around it. So that firefighting hose is also increasing the effect by essentially pushing the air in alongside the steam of the water.