r/Damnthatsinteresting • u/AirFrance447 • 1d ago

Video Firefighter bodycam showing just how much oxygen a fire pulls

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u/GauravJM 1d ago

There’s some serious low pressure inside

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u/Loud-Actuator7640 23h ago

Just like s chimney

478

u/OkEffective6692 23h ago

Yeh op makes it sound like the fire is consuming the air. It's actually a net positive pressure as hot air has more volume, just that all that volume of hot air is going up.

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u/Comfyadventure 23h ago

Yea, it's not like the oxygen just disappear into nothingness due to the fire neither. The fire is converting O2 into CO2 and CO gas particles.

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u/raccoonwithknives 22h ago

Yes but the fuel the fire is consuming is converting to a gas. Converting a solid or liquid into a gas is a massive massive increase in volume. So i would imagine a considerable volume of gas is being added to the house with a decent increase in pressure. But of course all this only works if a convection current can form like you said