Water Mist Systems
Precision suppression using fine droplets to cool fire and displace oxygen with minimal water usage and zero chemical residue.
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What is a water mist system?
A water mist system utilizes very fine water droplets—typically 1,000 microns or less—to suppress or extinguish fires through two primary mechanisms: cooling and oxygen displacement. By atomizing the water, the system increases the surface area for heat absorption, converting water to steam rapidly which then locally displaces oxygen at the flame front.
This technology uses approximately 70-90% less water than traditional sprinklers, making it an ideal choice for environments where water supply is limited or collateral damage from water discharge is a critical concern, such as heritage sites or sensitive electronic equipment areas.
System Classifications
Low-pressure Systems
Operating at 175 psi (12 bar) or less; often used for standard light hazard applications.
Intermediate & High-pressure
Pressures up to 1,500 psi (100+ bar) to create the finest droplet sizes for rapid vaporization.
Total Flooding
Protects entire enclosures, creating a uniform mist density across the volume of the space.
Local Application
Directs mist specifically at a high-hazard object, such as a turbine or oil-quench tank.
Design Criticality
Unlike standard sprinklers, water mist systems are performance-based and highly dependent on listing-specific criteria. Our engineering focus includes:
Mitigation of collateral damage in sensitive or heritage environments. Protection of machinery and high-energy hazard processes. Listing and approval-based design verification (FM/UL). Critical nozzle spacing and obstruction analysis. Minimization of water storage requirements and infrastructure.
How Lacuna approaches it
Analyze
Deep-dive review of the space, fuel loading, and ventilation conditions.
Verify
Selection of listing/approval-based design criteria specific to your hazard.
Engineer
Complex hydraulic calculations and optimized nozzle layout for high-pressure flow.
Coordinate
AHJ coordination to ensure standard compliance for non-traditional systems.
Execute
On-site construction support and commissioning of specialized pumps and controls.
Applicable codes & standards
Specific design parameters are derived from manufacturer-specific UL/FM testing protocols.
Where it's used
Protect your assets with precision.
Request a review of your high-hazard project.