Fire Suppression System Design UK
NPHS designs water mist and specialist fire suppression systems for projects across the UK. We review the building, fire strategy, occupancy, water supply, relevant water mist standards, test evidence and installation constraints before developing a system that can be coordinated, installed, commissioned and maintained properly.
Send us your drawings, fire strategy, specification or project details and our design team can review the suppression route before key construction decisions are fixed.
Professional fire suppression system design for UK projects
Fire suppression design turns the fire strategy and building information into a coordinated water mist or specialist suppression system that can be installed, commissioned and maintained properly.
The design then establishes what the system needs to achieve, which technology is suitable, what standards and test evidence apply, and how water, plant and installation requirements will be coordinated.
NPHS supports contractors, developers, architects, consultants, housing providers, facilities teams and property owners during the design and specification stage.
We can become involved while the suppression route is still being assessed, after a fire strategy has identified a requirement, or once a project team needs a detailed design that can move into installation.
Early involvement is especially useful where water supply, plant space, ceiling voids, heritage finishes, complex room layouts, retrofit constraints or other building services may affect the final system.
See how NPHS takes a design into installation →
Who is fire suppression design support for?
NPHS works with the people responsible for turning fire strategy requirements into a coordinated, installable and maintainable suppression system.
Main contractors and project managers
Design review, programme input and coordination before ceilings, risers, plant areas and service routes are fixed.Architects and fire consultants
Standards-aware design input, system selection support and evidence review around the building and fire strategy.M&E consultants and contractors
Coordination of water supplies, compact pumps and plant, power, controls, alarms, pipe routes and service interfaces.Developers and housing providers
Design support for flats, apartments, care, supported living, sheltered housing and wider residential schemes.Property owners and facilities teams
Design for refurbishments, alterations, retrofit projects and replacement or extension of existing fire suppression systems.
“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
What does fire suppression system design include?
Fire suppression design connects the building, fire strategy and selected water mist or specialist system into coordinated information that the site team can actually build from.
The design also needs to cover water supply, system evidence, installation details, commissioning, handover and future maintenance.
The exact design scope depends on the building, selected system, project stage and agreed responsibilities.
- Review the building type, use, occupancy, layout and fire strategy
- Establish what the suppression system is required to achieve
- Identify the relevant water mist standard, test protocol and project approval route
- Check whether the proposed system is tested for the application and configuration
- Assess water pressure, flow, demand and any storage or pump requirements
- Develop water mist nozzle or specialist discharge-point positions within permitted design limits
- Plan pipework routes, valves, plant, controls and system interfaces
- Coordinate ceilings, lighting, walls, services, structure and access requirements
- Prepare the design information required for installation and project review
- Carry the agreed design into commissioning, handover and future maintenance
How does NPHS choose the right fire suppression system?
NPHS selects the water mist or specialist suppression route around the building, fire risk, fire strategy, water supply, available space, tested application, relevant standard, project constraints and long-term maintenance requirements.
Domestic and residential water mist
Compact water mist systems can deliver high-performance suppression with dramatically reduced water usage, smaller pipework and discreet ceiling nozzles. They are particularly well suited to homes, apartments, care, supported living, retrofit projects and high-finish interiors.Commercial and industrial water mist
High-pressure and low-pressure water mist can protect commercial buildings, heritage properties, infrastructure, machinery and selected industrial risks. Reduced water demand and compact plant can make the system easier to accommodate while maintaining high-performance fire suppression.Specialist suppression
Cease Fire, gaseous suppression and other specialist systems can protect commercial kitchens, electrical equipment, server environments, machinery and defined local risks. The design is built around the ignition source, protected asset, controls, interfaces and maintenance requirements.What does water mist system design need to consider?
Water mist delivers high-performance fire suppression with dramatically reduced water demand, compact plant, smaller pipework and discreet nozzles.
Those advantages can reduce space requirements and secondary water damage while giving designers far more flexibility in homes, apartments, commercial buildings, retrofit projects and high-finish interiors.
Water mist uses purpose-designed nozzles to create fine droplets that absorb heat quickly, support evaporation and move around the fire plume. The high surface area helps suppress fire rapidly while keeping water flow and discharge volumes dramatically lower.
The design team checks the application against current test evidence and the manufacturer design manual. If a proposed layout moves outside the tested parameters, the performance basis needs technical review before the design proceeds.
For domestic and residential projects, the iCO pump unit measures just 342 mm × 342 mm × 495 mm, helping designers accommodate fire suppression where plant space is limited.
Nozzle positions, ceiling finishes, room layouts and equipment locations should be considered while architectural decisions can still be changed.
Learn more about water mist fire suppression →
Water supply, nozzles, pipework and plant all affect the design
Water mist design needs to treat the system as a complete package. Pump, controls, distribution, sectioning, pipework and discharge points work together, so equipment cannot be selected in isolation.
- Water supply: Confirm available pressure, flow and competing demand early rather than assuming the incoming mains can support the system.
- Nozzle positions: Keep spacing, wall distances, ceiling heights and orientations within the tested design limits for the selected system.
- Obstructions: Coordinate pendant lights, beams, bulkheads and other objects so the tested spray pattern remains clear.
- Ceiling voids: Allow enough depth and access for the nozzle, pipework, fixing, adjustment and future inspection.
- Pipework: Plan routes from the pump to each nozzle and keep pipe type, length and configuration within manufacturer requirements.
- Plant location: Allow suitable space, power, service access and connection to wider controls or alarm interfaces where required.
- Finished appearance: Coordinate visible components early where architectural finishes and interior appearance matter.
- Maintenance: Make sure valves, equipment and service points remain accessible after construction is complete.
High-pressure and low-pressure water mist design
NPHS designs high-pressure and low-pressure water mist systems around the building, fire risk, tested application, available water and project requirements.
Both routes can deliver high-performance suppression with dramatically reduced water demand and compact system infrastructure.
High-pressure systems such as iCO and Ultra Fog can provide very fine droplets, compact pipework and rapid heat absorption across domestic, residential, commercial, infrastructure and selected industrial applications.
Low-pressure water mist can provide an effective route for suitable commercial and specialist projects where the tested application and system design support it.
NPHS reviews the project requirements, test evidence, water supply, available space and long-term maintenance needs before selecting and designing the most suitable water mist platform.
Water mist system installation by NPHS →How does fire suppression design coordinate with the rest of the building?
Suppression systems share ceilings, voids, risers, plant areas and service zones with other trades. Design coordination should happen while those areas can still be changed without major rework.
Ceilings and lighting
Water mist nozzles and specialist discharge points need suitable positions, clear discharge patterns and enough space for installation around lighting, bulkheads and ceiling details.Pipe routes and other services
Routes need to work around ducts, cable containment, plumbing, structure and other services while staying within the system design limits.Pumps and plant space
Compact water mist equipment still needs suitable connections, ventilation and service access for commissioning, inspection and future servicing.Controls and alarms
Pumps, valves, control panels, alarm contacts and system interfaces need to be coordinated with the wider fire and building services design.Architectural finishes
Heritage buildings and high-finish interiors can require careful equipment positioning so the system remains technically correct without unnecessary visual impact.Which standards apply to water mist system design?
Water mist design needs the right standard, test evidence and manufacturer design limits to support the exact system being proposed for the building.
The building, occupancy, fire strategy and project approval route then shape how that evidence is applied.
BS EN 14972-1:2020+A1:2025 provides the current framework for the design, installation, inspection and maintenance of fixed land-based water mist systems. BS EN 14972-17:2025 provides the residential occupancy fire-test protocol for automatic nozzle water mist systems.
BS 8458:2015 was withdrawn by BSI in July 2025. Existing independently tested and certified products may still use that evidence, but the proposed design should be assessed against the current certification, design limits, fire strategy and project approval route.
Approved Document B and the relevant national or local Building Regulations route may also shape the wider fire safety strategy and project approval discussion.
| Reference | Design relevance |
|---|---|
| BS EN 14972-1:2020+A1:2025 | Current framework for fixed land-based water mist design, installation, inspection and maintenance. |
| BS EN 14972-17:2025 | Residential occupancy fire-test protocol for automatic nozzle water mist systems. |
| BS 8458:2015 | Previous UK domestic and residential water mist code. Existing certification and test evidence may remain relevant to specific systems. |
| Manufacturer fire-test evidence | Confirms the applications, configurations and performance limits supported by the tested water mist system. |
| Manufacturer design manual | Defines system-specific nozzle spacing, flow, pressure, pipework, plant and installation limits. |
| Fire strategy / project approval route | Connects the proposed water mist design to the building-specific fire safety strategy and approval process. |
| Approved Document B / local regulatory route | Building Regulations guidance and the wider project compliance discussion. |
NPHS can support design, specification, installation, commissioning and documentation. Final project acceptance remains with the relevant appointed project and regulatory stakeholders.
Fire suppression design for domestic, residential, commercial and industrial projects
Building type changes the design problem. Occupancy, fire strategy, water demand, available space, finishes, hazard and maintenance arrangements all influence the final water mist or specialist suppression design.
Domestic homes
Individual homes, loft conversions and open-plan layouts can benefit from discreet water mist systems designed around room geometry, escape strategy, Building Control requirements and available space.Residential developments
Flats, apartments, supported living, sheltered housing and care schemes can use compact water mist systems designed around occupancy, repeated layouts, shared services, access and long-term management.Commercial buildings
Offices, hotels, public buildings and mixed-use property can use high-pressure or low-pressure water mist designed around the fire strategy, services, plant space and operational requirements.Industrial and warehouse risks
Machinery, process risks, infrastructure and selected industrial applications can use Ultra Fog or other specialist water mist systems where the tested application supports the risk.Heritage and retrofit projects
Existing structures, restricted voids, protected finishes, limited plant space and difficult routes are strong applications for compact water mist systems and early design coordination.Design needs to work at building scale
NPHS designs water mist and specialist suppression systems for projects ranging from individual homes to major residential, commercial, heritage and industrial schemes.
Scale, occupancy, water supply, selected technology and coordination requirements can vary significantly from one project to the next.
On repeated-layout residential schemes, water mist design needs to work consistently across multiple homes while allowing for site conditions and services. In high-finish properties, discreet nozzles and compact plant can protect the architecture.
In industrial projects, the protected hazard and equipment arrangement can determine whether Ultra Fog or another specialist system is appropriate.
The design stage is where those differences are resolved before they become installation problems.
View commercial NPHS projects →
What problems can late fire suppression design create?
Suppression design becomes harder once ceilings, services, plant areas and architectural details have already been fixed. Early checks give the project team more options and reduce avoidable redesign.
- Ceiling voids may be too shallow for the selected nozzle or pipework arrangement
- Lighting, bulkheads, beams or other services may obstruct the required discharge pattern
- Pipe routes may clash with ducts, containment or structure
- Plant rooms or cupboards may not have enough space for the selected equipment
- Incoming water pressure or flow may be lower than the assumed design condition
- Architectural finishes may make the proposed visible components unacceptable
- Room changes may push nozzle spacing, coverage or pipe lengths outside tested limits
- Valves, pumps or service points may become difficult to inspect and maintain
From design through installation, commissioning and maintenance
A suppression design should remain useful after the drawing has been issued.
NPHS can carry the project through installation and commissioning so the installed system can be checked against the agreed design.
Commissioning should cover the water supply, controls, pump operation, water mist nozzles or specialist discharge points, alarms and interfaces where relevant.
Clear handover records then give the client and building team a reference point for future inspection, maintenance, alterations and changes of use.
Fire suppression system maintenance →Installation+
Installers work from coordinated information covering pipe routes, nozzles or specialist discharge points, plant, valves and interfaces.
Commissioning+
Checks confirm that the installed system operates as required and reflects the agreed design.
Handover+
Drawings, system information, commissioning evidence and operating requirements support the building record.
Inspection and servicing+
Accessible equipment, clear records and known design limits make future system checks and defect investigation easier.
Alterations and change control+
Future building changes can be checked against the original design so coverage, access and system performance are not compromised.
What information does NPHS need to design a fire suppression system?
Send whatever information is currently available. Early plans and a fire strategy can be enough to begin reviewing the likely suppression route and identify the information needed for detailed design.
- Architectural floor plans and room layouts
- Reflected ceiling plans where available
- Sections, ceiling heights and known void depths
- Fire strategy or fire consultant requirements
- Building type, use, occupancy and project stage
- Known suppression standard, specification or approval requirements
- Water supply pressure and flow information where available
- M&E layouts, plant constraints and service coordination information
- Building Control, insurer, client or consultant comments
- Programme dates, phasing, access or retrofit constraints
Why use NPHS for fire suppression system design?
NPHS is the UK’s leading and largest water mist installer, designing water mist and specialist suppression systems for domestic, residential, commercial and specialist applications across the UK.
Our design capability includes iCO, Ultra Fog, Cease Fire and gaseous suppression systems. That gives project teams access to compact domestic and residential water mist, commercial and industrial mist, and targeted specialist protection from one experienced contractor.
NPHS can carry the project from early drawings and specification through design coordination, installation, commissioning, handover and planned maintenance.
That keeps system evidence, design limits, site delivery and project documentation connected from the first design decision through to long-term support.
Learn about NPHS water mist installation →Send NPHS your project drawings
Send us your drawings, fire strategy, specification or project notes and our team can review the suppression design requirements.
We can assess the building, occupancy, water supply, water mist standards, tested application, plant space, installation constraints and long-term maintenance requirements before advising on the next design stage.