FM-200 / HFC-227ea agent quantity for total flooding from FSS Code Ch.5: 6.25–9 % v/v concentration.
Formula
$$ W = \frac{V \cdot C / 100}{s \cdot (1 - C/100)}, \quad s = 0.1269 + 0.000513 T $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $V$ | Protected volume | m³ | GA plan |
| $C$ | Design concentration | % v/v | NFPA 2001 |
| $s$ | Specific vapour volume of HFC-227ea at T | m³/kg | 0.1269 + 0.000513 T |
| $W$ | Agent mass | kg | result |
Sources
- FSS Code Ch.5.
- NFPA 2001 - Clean Agent Fire Extinguishing Systems.