Understanding Fire Flow Calculations
Fire flow is the amount of water required to suppress a fire in a building, based on its area and construction type. This calculator estimates fire flow using a simplified formula inspired by NFPA and IFC standards.
The formula used is Fire Flow = (Area * Construction Factor) / Occupancy Factor. Construction factors vary: 1.5 for wood frame, 1.0 for non-combustible, and 0.8 for fire-resistive. An occupancy factor of 1 is assumed for simplicity.
Fire Flow Examples
| Area (sq ft) | Construction Type | Fire Flow (GPM) | Scenario |
|---|---|---|---|
| 10000 | Wood Frame | 1500 | Small commercial building |
| 20000 | Non-Combustible | 2000 | Industrial warehouse |
| 50000 | Fire-Resistive | 4000 | Large office building |
How to Use the Fire Flow Calculator
- Enter the building’s floor area (in square feet or square meters).
- Select the construction type (wood frame, non-combustible, or fire-resistive).
- Select the area unit (square feet or square meters).
- Select the flow unit (GPM or LPM).
- Click "Calculate Fire Flow" to see the required fire flow.
Fire Flow Comparison
Fire flow requirements for different building sizes (wood frame).
Frequently Asked Questions
What is fire flow used for?
Fire flow is used to determine the water supply needed for firefighting, ensuring adequate sprinkler or hydrant capacity for a building.
How does construction type affect fire flow?
Wood frame buildings require higher fire flow due to higher combustibility, while fire-resistive buildings require less.