In BS 5306-8, it is noted that dry powder extinguishers can reduce visibility and impair breathing, both of which inhibit the safe and easy escape – or rescue from – the space. With CO2, due to the confined space, the oxygen in the air will be quickly replaced by carbon dioxide making it difficult to breathe.
Dan Cook provides an excellent answer on the explosion hazard in confined spaces. The other issue is oxygen, or breathable air displacement. If you use an extinguisher in a confined space, the product discharged may displace any or all breathable air in the space if …
What Fire Extinguisher Shouldn’t be Used in Confined Spaces?
Similarly, care must also be taken when using powder extinguishers. When the powder is discharged it can impair visibility and impact the breathing of the user, possibly jeopardising their escape. The possibility of …
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What happens if you use a fire extinguisher in a confined space?
If you use an extinguisher in a confined space, the product discharged may displace any or all breathable air in the space if it is not already displaced. For example, a CO2 extinguisher will fill a space with CO2 and leave an air or oxygen concentration too low to support life.
Are carbon dioxide fire extinguishers safe?
Furthermore, carbon dioxide fire extinguishers may cause visibility issues as the CO2 replaces oxygen in the air and combats the flames, which is another cause for concern.
What type of fire extinguisher should you use in a fire?
When a fire breaks out in a confined space, it’s likely that you will use a water extinguisher (red label) or a foam extinguisher (cream label) to combat the flames. Foam extinguishers are particularly suited to fires caused by solids and liquids.
Should a fire extinguisher be pointed at the top or bottom?
But not for electrical fires. They should be used by pointing the nozzle above the fire and allowing the foam to rain down over the flame. A water extinguisher should be pointed at the base of the fire, even when using a spray or mist variant.
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Where we should never use a CO2 Fire Extinguisher? Video Answer
Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher