CO₂ System - 85 % Discharge in 2 min

Check fixed CO₂ system performance per FSS Code Ch. 5: 85 % of the protected-space volume must be discharged within 2 minutes for engine room / cargo hold systems.

CO2FSS CodeFire

Protected volumem³Required design concentration%volCO₂ vapor density (STP)kg/m³Discharge timemin

Required CO₂ mass: 2,768kg

Discharge rate: 1,176.3kg/min

Rate (kg/h equivalent): 70,579kg/h

Changing the inputs requires JavaScript. The calculator above shows its default inputs and result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

\dot m_{CO_2} = \frac{0.85 \cdot V \cdot c \cdot \rho_{CO_2}}{t_{disch}}

Symbol	Meaning	Unit
$V$	Protected space volume	m³
$c$	Design concentration	%vol
$\rho_{CO_2}$	CO₂ vapor density	kg/m³
$t_{disch}$	Discharge time	min

Source: FSS Code Ch. 5

In short

Check fixed CO\u2082 system performance per FSS Code Ch.

Learn the theory FSS Code: International Code for Fire Safety Systems