Water Mist System Calculator
Calculate water mist fire suppression requirements per NFPA 750. Water mist uses fine droplets for efficient fire suppression with minimal water damage.
Water Mist System Classifications
| Pressure Class | Operating Pressure | Droplet Size |
|---|---|---|
| Low Pressure | < 175 psi (1.2 MPa) | Larger droplets |
| Intermediate | 175-500 psi | Medium droplets |
| High Pressure | > 500 psi (3.4 MPa) | < 200 micron |
Water Mist Suppression Mechanisms
Cooling
Fine droplets absorb heat efficiently through rapid evaporation, cooling both flames and surrounding surfaces.
Oxygen Displacement
Steam from evaporation displaces oxygen in the combustion zone, reducing fire intensity.
Radiant Heat Blocking
Mist cloud blocks radiant heat transfer, preventing fire spread to adjacent combustibles.