Water Mist Fire Suppression Systems
A water mist fire suppression system uses fine water droplets to help control or suppress fire while using less water than many traditional sprinkler systems. NPHS designs, installs, commissions and maintains water mist systems for domestic, residential and commercial buildings across the UK, with advice based on the building type, risk profile, relevant standard and long-term maintenance needs.
Send us your drawings or project details and we’ll advise on the most suitable fire suppression option for your building.
What is a water mist fire suppression system?
A water mist fire suppression system is an automatic fire protection system that discharges very fine water droplets through specialist nozzles when activated by heat, detection or system controls.
The mist helps suppress fire by cooling the flame, reducing radiant heat and limiting oxygen around the fire zone. The exact performance depends on the system design, nozzle type, water supply, pressure, room layout and the fire risk being protected.
NPHS supplies and installs water mist fire suppression systems for a range of building types, including homes, flats, apartments, commercial properties, heritage buildings and specialist environments.
How does water mist suppress fire?
Water mist suppresses fire by creating small droplets with a larger surface area than standard sprinkler droplets. This helps the water absorb heat quickly and turn into steam near the fire.
That process can help:
Cooling
Heat is absorbed from the flame and surrounding gases.
Oxygen displacement near the flame
Steam can help reduce oxygen around the fire zone.
Radiant heat reduction
Mist can help reduce heat transfer to nearby surfaces.
Fire control or suppression
The system can help contain or suppress the fire, depending on the design and risk.
A mist fire suppression system must be designed for the building and application. The right design is shaped by room size, ceiling height, ventilation, hazard type, occupancy and the relevant compliance route.
“The right water mist system starts with the building, not the product. We look at the layout, occupancy, fire strategy, water supply and approval route before deciding what the system needs to achieve.”
Ozziey Ulker
Operations Director, NPHS
Where are water mist systems used?
Water mist systems can be used in domestic, residential and commercial settings where the design can be matched to the fire risk and accepted compliance route.
Common applications include:
Domestic homes
Open-plan layouts, loft conversions, extensions and Building Control-led projects.
Residential buildings
Flats, apartments, supported living, sheltered housing and housing schemes.
Commercial buildings
Offices, hospitality, education, healthcare, public buildings and mixed-use sites.
Heritage and listed buildings
Spaces where pipe routes, visual impact and water use need careful planning.
Specialist environments
Plant rooms, machinery spaces and areas needing a project-specific assessment.
Suitability depends on the building. NPHS can review your drawings, fire strategy, risk information or Building Control requirements before recommending a water mist system, sprinkler system or other fire suppression option.
Is water mist suitable for domestic, residential and commercial buildings?
Yes, water mist can be suitable for domestic, residential and commercial buildings, provided the system is designed, installed, commissioned and maintained to the relevant standard and project requirements.
Why choose a water mist system?
Water mist can be a strong option where the building needs effective fire suppression with compact equipment, discreet nozzles and reduced water demand compared with many traditional sprinkler designs.
Key benefits can include:
Water mist is not the right answer for every building. Some projects need traditional sprinklers, gaseous suppression or another specialist system. NPHS will help you make that decision properly.
Lower water usage
Helps reduce stored water requirements and potential water damage.
Discreet installation
Small nozzles can suit homes, apartments, hotels and heritage interiors.
Compact equipment
Pump and tank arrangements can often fit into tighter plant spaces.
Retrofit potential
Pipework routes can often be planned around existing building fabric.
Automatic activation
The system can activate quickly when designed with the right controls and detection.
Long-term support
Inspection, servicing and records help keep the system fit for purpose.
Water mist, mist sprinklers and traditional sprinklers
Searchers often use terms like mist sprinkler system, water mist sprinkler system and mist fire suppression system to describe similar systems.
Technically, water mist and traditional sprinklers work differently.
Water mist system
Uses fine droplets to absorb heat and help suppress fire with lower water quantities.
Traditional sprinkler system
Uses larger droplets and greater water flow to control or suppress fire.
Specialist suppression
May use gas, foam or other agents for specific risks such as electrical or process hazards.
The right choice depends on the property, risk profile, compliance route, available water supply, plant space and maintenance requirements.
For some buildings, water mist is the neatest answer. For others, a sprinkler system is more appropriate.
Standards and compliance support
Water mist fire protection systems should be assessed against the relevant standard for the building and application.
Current standards and guidance need to be checked at specification stage. BS EN 14972-1:2020+A1:2025 is listed by BSI as the current standard covering design, installation, inspection and maintenance of water mist systems, while BS EN 14972-17:2025 is the current residential occupancy fire-test protocol. BS 8458:2015 was withdrawn in July 2025, but withdrawal of the standard does not automatically make a system previously tested and independently certified against BS 8458 unsuitable for continued use. Suitability should be considered on a project-specific basis, taking account of the system’s test evidence and third-party certification, the fire strategy, current guidance and the requirements of Building Control or another approving authority.
Approved Document B also affects fire safety design in England and includes guidance relevant to sprinkler provision in certain buildings. The official GOV.UK page should be checked for the latest version and amendments.
| Project need | NPHS support |
|---|---|
| Early specification | Review drawings, use case, building type and fire strategy. |
| Standards advice | Identify the likely standard or compliance route for review. |
| Installation planning | Coordinate pipework, nozzles, pumps, tanks and access requirements. |
| Commissioning | Test and record the system before handover. |
| Documentation | Provide project records for handover and future maintenance. |
| Maintenance | Inspect, service and document the system after installation. |
NPHS can support:
Final acceptance sits with the project team, Building Control, fire consultant, approving authority or insurer where relevant.
Water mist system design and installation
A water mist system needs proper design before installation starts. Guesswork causes problems.
NPHS will usually need:
- Drawings or floor plans
- Building use and occupancy details
- Fire strategy or consultant notes, where available
- Building Control requirements, where relevant
- Water supply information
- Ceiling heights and room layouts
- Preferred pump and tank locations
- Any access, aesthetic or listed building restrictions
The installation then needs to be planned around the building programme, other trades and handover requirements.
For contractors, this means fewer surprises on site.
For property owners, it means a system that has been designed around the real building, not a generic layout.
Modern Residential Scheme
High-capacity water mist fire suppression system protecting 75 residential units, delivering rapid response, reduced water damage, and modern regulatory compliance.
View the existing NPHS project →Commissioning and handover
Commissioning proves the installed system has been checked, tested and recorded before it is handed over.
This can include pressure testing, pump checks, controls checks, alarm interface checks, nozzle checks, system labelling and handover documentation.
For project teams, commissioning records are a key part of practical completion and Building Control close-out.
For facilities teams, they become the starting point for future inspection and maintenance.
Water mist system maintenance
A water mist fire suppression system must be maintained after installation.
Maintenance helps confirm the system remains available, operational and properly documented. This matters for life safety, asset protection, insurance, compliance records and long-term building management.
NPHS can provide planned maintenance for water mist systems, sprinkler systems and wider fire suppression systems.
Typical maintenance support may include:
Visual system checks+
Identify obvious damage, access issues or changes.
Pump and tank checks+
Confirm key equipment remains ready for operation.
Valve and control checks+
Check operating status and fault indications.
Nozzle and pipework checks+
Review condition, obstruction and installation integrity.
Documentation+
Record findings, defects and recommended actions.
Defect support+
Advise on remedial work where needed.
Why work with NPHS?
NPHS designs, installs, commissions and maintains fire suppression systems for UK projects where safety, compliance support and clean delivery matter.
The team works with contractors, consultants, facilities teams, developers, housing providers, property owners and domestic clients.
You can come to NPHS at early design stage, during procurement, before installation or when an existing system needs servicing.
The best starting point is simple: send the drawings, describe the building and explain what you need the system to achieve.
Client Testimonials
Together with McTears Construction we were tasked with the redevelopment of 20 supported living apartments. We will be installing 20 ICO Mist Sprinkler Systems.
Another project working with McLauglin Construction in partnership with North Ayrshire Council. A total Refurbishment of 20 sheltered housing apartments. We will be installing 20 ICO Mist Sprinkler Systems.
This is a fantastic project in the heart of Dunfermline. We are installing 18 ICO Mist Sprinkler systems into this luxury apartment development. Working with Mr Jim Turnball (MD) of Hunter Turnball the developers has been a pleasure.
Speak to NPHS about a water mist system
Choosing a water mist fire suppression system needs a project-specific review.
Send us your drawings, fire strategy or building details and we’ll advise on the most suitable route for your property, project programme and long-term maintenance needs.
FAQs
What is a water mist fire suppression system?
A water mist fire suppression system uses fine water droplets to help control or suppress fire. The mist absorbs heat, cools the flame and can reduce oxygen around the fire zone. It is commonly used in homes, residential buildings, commercial properties and specialist environments where the design is suitable.
How does water mist fire suppression work?
Water mist works by discharging fine droplets through specialist nozzles. These droplets absorb heat quickly and create steam near the fire. This helps cool the fire, reduce radiant heat and limit fire growth. The system performance depends on the design, pressure, nozzle layout, water supply and fire risk.
Is a water mist system the same as a sprinkler system?
A water mist system and a sprinkler system both use water, but they use it differently. Water mist uses fine droplets and often lower water quantities. Traditional sprinklers use larger droplets and higher water flow. The right option depends on the building, risk, standard, water supply and approval route.
Can water mist systems be used in domestic homes?
Yes, water mist systems can be used in domestic homes where the design suits the property and the approval route. They are often considered for open-plan layouts, loft conversions, refurbishments and Building Control-led projects. A project-specific assessment is needed before confirming suitability.
Are water mist systems suitable for commercial buildings?
Water mist systems can be suitable for commercial buildings, including offices, hospitality, public buildings, plant areas and specialist spaces. The design must match the fire hazard, occupancy, layout, water supply and relevant standard. Some commercial risks may need sprinklers or another specialist suppression system.
Do water mist fire suppression systems need maintenance?
Yes, water mist fire suppression systems need planned inspection and maintenance. Regular servicing helps confirm the system remains operational, accessible and properly documented. Maintenance records are important for facilities teams, insurers, compliance checks and long-term building safety management.