What is the HFC-227ea replacement? Getting to know PAF-222 FK-5-1-12
HFC-227ea is an HFC agent used widely in clean agent fire suppression systems, most often under the trade name FM-200. It suits areas holding electronic equipment and critical assets: data centers, server rooms, control rooms, and electrical rooms.
The industry is now moving toward agents with a lower global warming potential (GWP), and away from reliance on high GWP HFCs.
One of the agents drawing attention as an HFC-227ea replacement is FK-5-1-12, sold under brands such as PAF-222 and readily designed into clean agent systems for critical areas.
What is HFC-227ea?
HFC-227ea, or heptafluoropropane, is a hydrofluorocarbon (HFC) fire extinguishing agent with the chemical formula CF₃CHFCF₃ and an ozone depletion potential (ODP) of 0.
It is used in total flooding systems, particularly where electronic equipment has to be protected without water or dry chemical powder.
US EPA data puts the GWP of HFC-227ea at approximately 3,220. It remains among the HFCs still in use and monitored under HFC regulatory frameworks.
What is HFC-227ea used for?
Areas that commonly run HFC-227ea systems include:
Data centers
Server rooms
Control rooms
Electrical rooms
UPS rooms
Telecommunication rooms
Process control rooms
Areas holding critical electronic equipment
Are FM-200 and HFC-227ea the same agent?
FM-200 is the trade name for systems and products that use HFC-227ea, or heptafluoropropane, as the extinguishing agent.
So when people talk about an
HFC-227ea replacement
they usually mean an FM-200 replacement, or an agent that can serve as an alternative in systems built around HFC-227ea.
For a detailed technical comparison between FK-5-1-12 and HFC-227ea, covering agent types, applications, residue and environmental aspects, read more at What is the difference between FK-5-1-12 and HFC-227ea.
Why look for an HFC-227ea replacement?
The main reason is the GWP.
The US EPA lists HFC-227ea at approximately 3,220, while environmental regulation worldwide is pushing to phase down high GWP HFCs.
In the European Union, Regulation (EU) 2024/573 has tightened the HFC phase-down, with a target of progressively reducing HFCs through to 2050.
For fire suppression, the European Commission identifies FK-5-1-12 as one of the alternatives for applications currently running HFC-227ea and other HFC agents.
So system owners should start thinking about the transition:
HFC-227ea replacement → FM-200 replacement → low GWP clean agent → FK-5-1-12
What is PAF-222?
PAF-222 is an FK-5-1-12 clean agent fire extinguishing system designed to protect areas holding critical equipment and assets.
FK-5-1-12 is well known across the clean agent industry, and 3M's Novec 1230 is another trade name for an agent in the FK-5-1-12 group. If your organization currently runs a Novec 1230 system and is weighing FK-5-1-12 alternatives, read more at What is a Novec 1230 replacement.
For product detail, see What is PAF-222. For the chemical names that turn up on SDS documents and datasheets, see What is Perfluorohexanone.
What is the difference between HFC-227ea and PAF-222?
Topic | HFC-227ea / FM-200 | PAF-222 (FK-5-1-12) |
|---|---|---|
Agent Type | HFC | FK-5-1-12 |
Agent Name | HFC-227ea | FK-5-1-12 |
System Type | Clean Agent | Clean Agent |
ODP | 0 | 0 |
GWP | Approx. 3,220 | <1 |
Suitable for Electronics | ✓ | ✓ |
Data Center | ✓ | ✓ |
Server Room | ✓ | ✓ |
Electrical Room | ✓ | ✓ |
Leaves Residue Like Dry Powder | No residue | No residue |
Trend Direction | High-GWP HFC | Low-GWP Alternative |
Can PAF-222 be used to replace HFC-227ea?
It can be considered as an alternative, but not as a straight 1:1 agent swap into the existing system.
HFC-227ea and FK-5-1-12 are different agents, so the system design has to be worked out again, including:
Design concentration
Enclosure volume
Agent quantity
Number of cylinders
Cylinder size
Storage pressure
Piping size
Piping length
Number of nozzles
Nozzle locations
Discharge time
Room integrity
Fire detection system
Control and release system
To compare the types of clean agent system, including piped systems, pre-engineered cabinet systems and localized systems, read more at Different types of clean agent fire suppression systems and Clean agent fire suppression systems.
So if you have an existing FM-200 or HFC-227ea system and want to move to PAF-222, have a fire suppression engineer inspect and recalculate the system before anything else happens.
Why is FK-5-1-12 considered an HFC-227ea replacement?
The key point about FK-5-1-12 is that its GWP is extremely low compared with HFC-227ea.
Advantages of PAF-222 for clean agent fire suppression systems
1. A low GWP alternative
PAF-222 uses FK-5-1-12, whose GWP is very low compared with HFC-227ea, which lines up with the industry's move away from high GWP HFCs.
2. Suitable for areas with electronic equipment
Clean agent systems suit areas where the agent must not cause water damage or leave dry chemical residue.
For example:
Data center / server room / UPS room / control room / electrical room
For guidance on choosing cylinders and systems specifically for data centers, server rooms and electrical rooms, read more at Fire extinguishers for Data Centers / Server Rooms / Electrical Rooms.
3. Leaves no residue like powder extinguishers
Where an area holds servers, network equipment and control devices, cutting down the residue after a discharge is a critical factor in getting the system back up.
4. Supports the transition away from HFC systems
For owners looking to reduce reliance on HFC-227ea, FK-5-1-12 is one of the options worth considering when designing a new system or retrofitting an existing one.
How can an existing FM-200 system be converted to PAF-222?
Work through it in steps.
Step 1 — Verify the existing system
Confirm that the original system actually runs HFC-227ea, and gather the cylinder, valve, pipe, nozzle and control system data.
Step 2 — Survey the enclosure
Check room volume, layout, openings, doors, ceilings, raised floors and ventilation.
Step 3 — Select the design concentration
Set the design value against the hazard type and the standard being used.
Step 4 — Recalculate the system
Work out agent quantity, cylinder size, pipe size, nozzles and discharge time.
Step 5 — Check standards and certifications
Verify certificates, listings and approvals, and the engineering documentation for the actual agent and equipment being used.
For the certification documents to request and check before purchasing, read more at What certifications does PAF-222 have.
Step 6 — Test the system
Once installed, inspect and test the system against the project specifications and the relevant standards.
HFC-227ea replacement: why PAF-222 is worth considering
If your organization is planning a new system, PAF-222 FK-5-1-12 meets several goals at once:
Reduce HFC reliance → choose a low GWP agent → protect critical equipment → leave no powder residue → suits clean agent systems
What to read next after understanding HFC-227ea replacements
Now that you know what an HFC-227ea replacement is, and how PAF-222 FK-5-1-12 works as a low GWP option, these related topics follow on:
What is the difference between FK-5-1-12 and HFC-227ea
A detailed comparison of the technical properties of both agents.What is a Novec 1230 replacement
For current Novec 1230 users weighing options within the FK-5-1-12 group.What is PAF-222
PAF GLOBAL's clean agent fire extinguishing products.What is FK5112 / What is FK-5-1-12
Agent names and basic technical terms.What is Perfluorohexanone
The chemical name of the agent as it appears on SDS documents and datasheets.Clean agent fire suppression systems
For organizations designing and installing permanent systems for critical rooms.Different types of clean agent fire suppression systems
Comparing piped, pre-engineered cabinet and localized systems.Fire extinguishers for Data Centers / Server Rooms / Electrical Rooms
For teams planning protection where downtime is the expensive part.What certifications does PAF-222 have
For checking SDS documents, certificates and test reports before purchasing.Contact for consultation
To have the PAF GLOBAL team assess an existing system conversion.
Frequently Asked Questions (FAQ)
1. What is an HFC-227ea replacement?
An agent that can be used in clean agent systems in place of HFC-227ea. One of the widely used alternatives is FK-5-1-12, found in products such as PAF-222.
2. Are HFC-227ea and FM-200 the same?
HFC-227ea is the chemical name, heptafluoropropane. FM-200 is the trade name of the product or system that uses it as the extinguishing agent.
3. Can PAF-222 be used instead of FM-200?
It can be considered as an alternative, because PAF-222 uses FK-5-1-12, a clean agent that can serve in place of HFC-227ea. The system still has to be redesigned and recalculated. Swapping the agent 1:1 without checking the system is not recommended.
4. Are PAF-222 and HFC-227ea the same agent?
No. HFC-227ea and FK-5-1-12 are different agents, though both can be used in clean agent systems for appropriate areas.
5. Why can PAF-222 replace HFC-227ea?
Because PAF-222 FK-5-1-12 was developed and is used as a low GWP alternative for systems running HFCs, HFC-227ea among them. The European Commission identifies FK-5-1-12 as one of the alternatives to HFC-227ea in fire protection applications.
6. What is the GWP of HFC-227ea?
US EPA data lists it at approximately 3,220.
7. Is PAF-222 suitable for data centers?
PAF-222 FK-5-1-12 can be designed into clean agent systems for data centers and server rooms, provided the hazard, room volume, design concentration and system specifications are properly worked out.
8. Can PAF-222 be filled directly into an existing FM-200 cylinder?
Direct filling is not recommended. Both are clean agents, but they are different substances with different design properties. Cylinders, valves, piping and nozzles all have to be checked, and the system recalculated first.
9. Does PAF-222 leave residue after discharge?
PAF-222 FK-5-1-12 is a clean agent used to protect critical equipment, and it leaves no residue the way a dry chemical extinguisher does.
10. What is the best replacement for HFC-227ea?
There is no single best agent. The choice has to account for hazard type, room volume, safety, standards, certifications, cost and how well the system suits the space. PAF-222 FK-5-1-12 is one of the main alternatives worth comparing.