Water mist and preaction sprinklers for data centers
Water-based protection has two forms in a data hall. Water mist uses fine droplets at high pressure, and Marioff claims up to 90% less water. Preaction sprinklers keep pipes dry until detection and a second trigger fill them, and Reliable and Viking package them for data rooms. Fifteen companies below sell one or the other.
| Approvals | |||||||
|---|---|---|---|---|---|---|---|
| AQUASYS Technik | — | Yes | — | — | — | Linz, Austria | 2026-11-11 |
| Fike | Manufacturer | Yes | — | — | — | — | 2026-11-11 |
| FOGTEC | Manufacturer and installer | Yes | — | — | — | Cologne, Germany | 2026-11-11 |
| Fortis Fire & Safety (including VFS) | Installer / service | — | Yes | — | — | — | 2026-11-11 |
| Johnson Controls (Ansul, Tyco, LPG) | Manufacturer and installer | Yes | Yes | — | — | — | 2026-11-11 |
| Marioff (HI-FOG) | Manufacturer and installer | Yes | Yes | Yes | FM Approved for use in data centers | Vantaa, Finland | 2026-11-11 |
| Minimax | Manufacturer | Yes | — | — | — | — | 2026-11-11 |
| ORR Protection | Installer / service | Yes | — | — | — | — | 2026-11-11 |
| Protec Fire and Security Group | Manufacturer and installer | Yes | — | — | — | Nelson, United Kingdom | 2026-11-11 |
| Reliable Automatic Sprinkler | Manufacturer | — | Yes | Yes | FM Approved as a factory-assembled system | Liberty, South Carolina, USA | 2026-11-11 |
| Scutum | — | Yes | — | — | — | — | 2026-11-11 |
| Siemens (Sinorix) | Manufacturer | Yes | — | — | — | Zug, Switzerland | 2026-11-11 |
| Ultra Fog | — | Yes | — | — | — | Kungsbacka, Sweden | 2026-11-11 |
| Victaulic (Vortex) | Manufacturer | — | — | Yes | Vortex Pre-Engineered System: FM approved for above-raised-floor data processing rooms/halls | Easton, Pennsylvania, USA | 2026-11-11 |
| Viking Group | Manufacturer | — | Yes | Yes | Data Center Upgradeable System is UL Listed | Michigan, USA | 2026-11-11 |
Mist, hybrid or preaction
How fields are readWater mist
Ultra Fog publishes 65 bar for data halls and single-tier underfloor spaces and 70 bar for double-tier underfloor, with nozzles spaced up to 4.1 m and a 68 °C bulb, against FM5560 Appendix M and N. AQUASYS validates each project with CFD simulation and real fire tests, and its BNP Paribas installation lets unaffected computers keep running.
Hybrid
Victaulic’s Vortex discharges water and nitrogen from one emitter and says no tight room integrity is needed. The pre-engineered system is FM approved for above-raised-floor data rooms, up to about 10,000 ft³.
Preaction
Viking’s Data Center Upgradeable System converts a dry system to preaction and is UL Listed. Marioff offers single- and double-interlock preaction valves, and Reliable’s PrePaK is FM Approved as a factory-assembled system.
Gaseous alternatives: clean agent and inert gas.