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A backdraft occurs when a fire burns in an enclosed space with little ventilation, consuming most of the available oxygen. As the flames die down, heat continues to drive off flammable gases and smoke, which build up under pressure inside the space. When a door, window, or other opening is made, oxygen suddenly rushes in and mixes with these hot gases, causing them to ignite explosively. This rapid ignition produces the violent blast known as a backdraft, often signaled beforehand by smoke pulsing from gaps, soot-stained windows, and air being drawn inward.
#science #physics #chemistry #learning #facts #explained #fire #flame
Date: September 18, 2025
That is NOT a backdraft fire. If you look those up you see a clear difference.
This is a large propane torch (basically a flamethrower) pointed directly towards the door to train how to fight your way into a room or building. You "push" the fire back and close the valve in the back of the room.
A backdraft drill is very different from that (also easy to look for footage) and has enough force to knock you off your feet if you stand too close.
Which is why firefighters often sit or kneel on the ground before opening the next section of a building, expecting the backdraft.
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First 1 isn't backdraft, its fuel, gas vent.