Fire Flow Calculator
Calculate needed fire flow (NFF) using ISO methodology.
Fire Flow Duration (ISO)
| NFF (GPM) | Duration | Total (Gallons) |
|---|---|---|
| 500-1,000 | 2 hours | 60,000-120,000 |
| 1,250-1,750 | 2 hours | 150,000-210,000 |
| 2,000-2,500 | 2.5 hours | 300,000-375,000 |
| 3,000-3,500 | 3 hours | 540,000-630,000 |
| 4,000+ | 4 hours | 960,000+ |