Suppression Advisor

Which extinguisher for this cabin?

Compares the ISS CO₂ extinguisher with the Fine Water Mist extinguisher for your cabin: what each discharge does to the air around the fire and to the air the crew breathes. It names a winner only when the evidence supports one.

Working out the discharge…

Cabin and fire

What is burning? Heptane (hydrocarbon liquid)flight-tested fuel Methanol (alcohol liquid)flight-tested fuel Other / unknown liquidrelative comparison only Electrical / batterysourced rule only Solid materialhazards and evidence only

Cabin free volume100 m³Cabin pressure101.3 kPaO₂ mole fraction0.21CO₂ already in the cabin0.00%

Where the discharge goes Whole cabin Aimed at the fire

“Whole cabin” is the cautious case. Crew safety is always judged on the whole cabin, because that is what the crew breathes.