Key takeaways
In this article
FM-200 is the trade name commonly associated with HFC-227ea. It is a hydrofluorocarbon clean agent that suppresses fire mainly through heat absorption and interference with the combustion process. It has been used widely in gaseous fire suppression systems for electronic and electrical risks.
Novec 1230 is a 3M trade name for a fluoroketone fire protection fluid, commonly referred to by the agent designation FK-5-1-12. It was developed as a lower global warming potential alternative to older halocarbon agents and became widely used in clean agent fire suppression systems.
Both agents are designed for applications where water, foam or powder would be unsuitable.
Typical examples include:
Both agents are non-conductive and leave no significant residue. That is why they became popular for protecting sensitive equipment and high-value assets.
But the important issue now is not just how they perform during a fire. It is whether they are the right long-term specification.
This is where FM-200 becomes difficult to justify for new installations.
FM-200/HFC-227ea is an HFC-based agent. HFCs were originally adopted in many industries as replacements for ozone-depleting substances, but they are now subject to global phasedown because of their climate impact. FM-200 has a high global warming potential, which makes it increasingly unsuitable as a future-facing specification.
This does not mean FM-200 suddenly stopped working. It remains an effective fire suppressant when correctly designed and maintained. Existing FM-200 systems may still be found in many buildings and may still need inspection, servicing, pressure checks, integrity testing, recharge planning and lifecycle support.
However, for new installations, FM-200 should generally be treated as a legacy issue rather than a preferred solution.
The practical concerns are:
Novec 1230 was often promoted as the cleaner environmental alternative because it has very low global warming potential compared with FM-200. However, the position is now more complicated. Novec 1230 is associated with the broader PFAS discussion, and 3M has announced its exit from PFAS manufacturing. This means specifiers should be careful about naming a brand without checking current supply, approvals and long-term support.
The best approach is to move away from outdated "FM-200 vs Novec 1230" thinking and instead review modern approved clean agent and inert gas options against the actual risk, current standards and long-term maintenance requirements.
From a fire suppression perspective, clean agents are attractive because they can act quickly and cleanly.
A correctly designed clean agent system will discharge into the protected enclosure, achieve the required design concentration, suppress the fire and leave the protected equipment largely free from agent residue. This is especially important in rooms containing servers, electrical controls, communications equipment or other assets that could be seriously damaged by water or powder.
Key performance considerations include:
The agent itself matters, but it is only part of the system. A well-selected agent will still fail if the room cannot hold concentration, if nozzles are poorly positioned, if ventilation continues to remove agent, or if detection and release logic are not properly designed.
This is why clean agent suppression should never be selected purely from a brochure or a headline comparison. The protected space must be surveyed and engineered properly.
Historically, FM-200 was often attractive because it was familiar, widely available and cost-effective compared with some alternatives. That historic cost position is one reason many existing systems still use FM-200.
For new projects, the cost discussion has changed.
The cheapest initial agent price is not necessarily the lowest whole-life cost. A system that uses a legacy or declining agent may become more expensive over time if refills become harder to source, environmental requirements tighten, or clients decide they no longer want HFC-based systems in their estate.
When comparing clean agent and inert gas systems, facilities managers should consider:
A modern clean agent may have a higher initial cost than a legacy FM-200 approach, but it may offer better long-term value if it is more acceptable environmentally and easier to support over the life of the building.
Inert gas systems can also be attractive, especially from an environmental perspective, but they often require more cylinder storage space. In some buildings this is not a problem. In others, storage space, pipe routes and discharge pressure need careful consideration.
The answer depends on whether you are dealing with an **existing system** or a **new installation**.
If you already have an FM-200 system, the first step is not necessarily immediate replacement. The system should be reviewed properly.
Important questions include:
Existing FM-200 systems may continue to need maintenance and support, but they should be treated as part of a managed lifecycle plan. Building owners should understand the long-term risks around agent availability, cost and environmental acceptability.
Existing Novec 1230 systems should also be reviewed, but for different reasons.
The system may still be technically suitable and effective, but owners should confirm current support arrangements, agent availability, manufacturer position, system approval and replacement options. The issue is not simply whether the agent works. The issue is whether the system remains supportable and sensible for the long term.
For new installations, Astro would not normally recommend FM-200 as the preferred route. The system should instead be designed around current, future-facing options.
Depending on the risk, this may include:
The correct choice depends on the protected space, occupancy, business continuity requirements, environmental expectations, insurer requirements and available plant space.
Many buildings now contain a mixture of older and newer suppression systems. A site may have FM-200 in one server room, Novec 1230 in another, CO2 in an electrical plant room and sprinklers elsewhere in the building.
This is not automatically wrong, but it does create management challenges.
Different systems may have different:
Facilities teams need to know exactly what is installed and how each system operates.
Retrofitting or replacing a legacy FM-200 system is not always a simple agent swap.
A proper review should consider:
In some cases, parts of the existing infrastructure may be reusable. In other cases, a full redesign is the safer and more reliable option.
A direct replacement decision should always be based on engineering assessment, not assumption.
The technical reality is that clean agent fire suppression is not just about choosing a brand name.
FM-200, Novec 1230 and other clean agent systems all belong to a wider category of gaseous fire suppression. Their success depends on correct design, correct installation, correct commissioning and ongoing maintenance.
For any clean agent system, the key questions are:
A poorly designed modern system can underperform. A legacy system may still work today but create future problems if there is no lifecycle plan. The engineering matters as much as the agent.
The clean agent market has changed. FM-200 should now be viewed as a legacy HFC-based system rather than a recommended choice for new installations. Novec 1230 also needs careful consideration because brand availability and PFAS-related concerns have changed the long-term specification picture.
For facilities managers and building owners, the best approach is to avoid selecting suppression based on outdated comparisons.
Instead, start with the risk:
For existing FM-200 systems, the priority should be inspection, maintenance and replacement planning. For new systems, the priority should be a future-proof design using current approved agents or alternative gaseous suppression technologies.
Astro Fire Systems can assess existing clean agent installations, advise on FM-200 replacement planning, review room integrity, and design suitable suppression systems for data centres, server rooms, electrical spaces and other critical environments.
The right answer is rarely "choose this agent because it is cheaper" or "choose that agent because it is newer". The right answer is a properly engineered system that protects the risk, meets current requirements, can be maintained, and will remain viable for the life of the facility.
BS EN 15004
ISO 14520
BS 6266
BS 5839-1
F-Gas Regulation requirements
Manufacturer design manuals and system approvals
Insurer requirements
Site-specific fire risk assessment
Plus insurer requirements and site-specific fire risk assessment
No, FM-200 is not currently banned, and many existing systems continue to provide effective fire protection across data centres, telecommunications facilities and other critical environments. However, the regulatory landscape surrounding the HFC-227ea extinguishing agent used within FM-200 systems has changed significantly over recent years.
FM-200 is a trade name, whereas HFC-227ea is the actual fire suppression agent. HFC-227ea has been subject to a long-term phasedown programme under international environmental agreements and F-Gas legislation aimed at reducing the use of high Global Warming Potential (GWP) gases. As part of this ongoing process, further restrictions came into effect from January 2025 affecting the placement of new HFC-based fire suppression systems on the market.
Existing FM-200 systems can continue to be operated, maintained and supported. However, when agent replacement is required, refilling increasingly relies on reclaimed and recycled HFC-227ea rather than newly produced agent. This has contributed to rising recharge costs and increased focus on long-term lifecycle planning.
For most organisations, the key question is not whether an FM-200 system can remain in service today, but how future maintenance costs, agent availability, business continuity requirements and environmental objectives may influence long-term fire protection strategy. A well-maintained FM-200 system can continue to provide effective
protection, but many organisations are now assessing future replacement options as part of wider asset lifecycle planning.
Reviewed by David Cullis, Managing Director, Astro Fire Systems Ltd. Astro Fire Systems Ltd is BAFE certificated under SP203-1 (Fire Detection & Alarm Systems) and SP203-3 (Fixed Fire Suppression Systems).
There is no single best replacement for FM-200, and organisations should be cautious of anyone suggesting that an FM-200 system can automatically be converted to an FK-5-1-12 system without detailed engineering assessment. Whilst FK-5-1-12 based systems are often one of the first options considered when replacing HFC-227ea, the two agents have different physical properties, design concentrations, storage requirements and discharge characteristics.
As a result, a conversion is rarely as simple as replacing cylinders and changing the agent. The suitability of the existing pipework, nozzles, cylinder storage arrangements, pressure relief provisions and enclosure characteristics must all be assessed. Hydraulic flow calculations should be completed to confirm whether the existing distribution network remains suitable for the new extinguishing agent and system design.
In some cases, the assessment may show that the existing pipework can be retained with modifications such as replacement nozzles, new cylinders, revised controls and updated calculations. In other cases, the hydraulic calculations may demonstrate that sections of pipework need to be altered or replaced, which can significantly change the scope and cost of the project.
It is also important to recognise that changing the extinguishing agent is generally considered a major modification to the fire suppression system rather than routine maintenance. Once a system is substantially modified, consideration should be given to the standards, approvals and compliance requirements applicable to the upgraded installation. This may extend beyond the suppression equipment itself and include detection, control panels, interfaces, shutdown functions, warning devices, room integrity, pressure relief arrangements and other associated life-safety systems.
For this reason, replacement planning should begin with a detailed survey and engineering review rather than an assumption that one clean agent can simply be substituted for another. In some situations, FK-5-1-12 may prove to be the most practical solution. In others, inert gas systems such as IG-541, IG-55 or IG-100 may offer a more suitable long-term approach depending on the risk, occupancy, building constraints and operational objectives.
Yes, FK-5-1-12 fire suppression systems remain available and existing installations continue to be supported. However, it is important to understand the difference between the Novec 1230 brand name and the FK-5-1-12 extinguishing agent itself.
Novec 1230 was 3M's trade name for an FK-5-1-12 clean extinguishing agent. Whilst 3M has exited PFAS manufacturing, FK-5-1-12 chemistry has not disappeared and continues to be available from other manufacturers under a variety of approved products and trade names.
Current industry guidance indicates that FK-5-1-12 remains available for new fire suppression systems in certain applications and is expected to continue to play an important role in the fire protection industry for many years to come. Existing FK-5-1-12 systems can continue to be maintained, serviced and refilled, and there is currently no proposal requiring the removal of installed systems.
When considering a new suppression system, organisations should focus on the extinguishing agent, approvals, manufacturer support, long-term supply arrangements and lifecycle considerations rather than a specific historic brand name. In practical terms, the question is often less about whether “Novec 1230” is available and more about whether FK-5-1-12 remains a suitable solution for the risk being protected.
As with any fire suppression project, the correct choice should be determined through risk assessment, engineering design, business continuity requirements, environmental objectives and long-term asset management considerations.
In many cases, yes. Existing FM-200 systems can continue to be operated, maintained and serviced, provided they remain in good condition and continue to meet the requirements of the protected risk. There is currently no requirement to automatically replace an FM-200 system simply because it contains HFC-227ea, and many systems continue to provide effective protection across data centres, telecommunications facilities and other critical environments.
However, system owners should recognise that the discussion today is often less about whether the system still works and more about whether it remains the most appropriate long-term solution. Factors such as system age, component availability, future agent supply, recharge costs, business continuity requirements, insurer expectations and environmental objectives should all be considered as part of ongoing asset management.
Particular attention should be given to systems that have a history of leakage, accidental discharge, repeated maintenance issues or ageing components. Whilst existing FM-200 systems remain supportable, replacement agent increasingly relies on reclaimed and recycled HFC-227ea supplies. As a result, recharge costs can be significantly higher than many system owners expect, particularly where large quantities of agent are involved.
Organisations should also consider future project requirements. If a system is approaching the point where major modifications, significant component replacement or wider building refurbishment works are being planned, it may be appropriate to assess whether continuing with HFC-227ea remains the most cost-effective approach. In some situations, a lifecycle review may identify benefits in migrating to an alternative suppression technology rather than investing heavily in ageing infrastructure.
The key question is often not whether an FM-200 system can remain in service, but whether it remains the best long-term solution for the facility. A professional engineering review can help identify future risks, likely maintenance costs, compliance considerations and potential upgrade pathways before they become urgent business issues.
FM-200 lifecycle planning is the process of understanding how the system will be maintained, supported and funded throughout the remainder of its operational life. Whilst many discussions focus on the HFC-227ea extinguishing agent itself, effective lifecycle planning should consider the entire fire suppression system rather than a single component.
A typical review should assess the age and condition of cylinders, actuators, control equipment, detection systems, pressure relief arrangements, room integrity, pipework, nozzles and associated interfaces. Consideration should also be given to spare parts availability, manufacturer support, future maintenance costs and the potential impact of any building alterations or operational changes.
Particular attention should be paid to the potential consequences of a future discharge or major leak event. As HFC-227ea increasingly relies on reclaimed and recycled supplies, recharge costs can be significantly higher than many organisations anticipate. Understanding this potential exposure allows system owners to make informed decisions about future investment and risk management.
One of the most common opportunities to review replacement options is when cylinders become due for hydrostatic testing or major refurbishment. Many FM-200 systems contain cylinders that require periodic inspection, testing or replacement on a 10-year cycle. By the time cylinder testing, agent handling, refurbishment works and associated maintenance costs are considered, organisations may find that a wider system upgrade becomes commercially attractive. Rather than investing heavily in ageing HFC-227ea infrastructure, it can make financial and operational sense to evaluate alternative suppression technologies at the same milestone.
The objective of lifecycle planning is not to replace a system simply because it is old, but to identify the point at which continued investment in the existing installation becomes less attractive than a planned upgrade. By assessing these factors in advance, organisations can make informed decisions at a time that suits their operational and budgetary requirements rather than being forced into an urgent decision following a discharge, major fault or regulatory change.
Whether you need a new system, an existing installation reviewed, or maintenance support, our engineers can help. Call 01905 964703 or request a free site survey.
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BAFE accredited fire protection specialists (SP203). Over 20 years of experience in fire suppression and detection for data centres, manufacturing, commercial and public sector clients across the UK.
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