The usual default for new server-room gas systems — check the agent source

Clean Agent System: FK-5-1-12 (formerly 3M Novec 1230)

Fike · Kidde · ANSUL · Firetrace Canada & United States $$$ · Low four figures for a small room; much more with detection and sealing

A fluorinated ketone stored as a liquid that turns to vapour on discharge, floods a sealed room and puts the fire out mainly by absorbing heat. It leaves no residue, which is why it is used in server rooms, archives and control rooms.

Why we like it

No residue — electronics and paper are not soaked or coated
Reaches design concentration in about 10 seconds
Designed to be safe for people at design concentration within NFPA 2001 safety margins

Watch out for

3M stopped making Novec 1230 when it exited PFAS manufacturing at the end of 2025; recharge agent must now come from another listed source
Only works if the room holds the gas — open doors or unsealed penetrations defeat it
A fluorinated chemical that broad PFAS definitions capture, so future rules could affect it

Best for

Enclosed server rooms, data closets, archives and control rooms where water damage would be worse than the fire.

Read the full market guide — costs, install effort and alternatives ↓

Market guide

The whole commitment, end to end

What this actually is, what the market looks like, what it really costs, and how much of your time it wants — before you spend anything.

Buying it Hard

Installing it Major project

Living with it Moderate

Up front

USD $2–$10 per sq ft protected (≈ CAD $2.75–$13.80). The source's example small server room of 500 sq ft came in at USD $2,000–$4,000; that is a low-end example, not a typical project with full detection and sealing.

Lead time

Design, room testing and installation; weeks for a typical room

Time to install

Days on site, after design and room sealing

How it works

Detectors wired to a releasing panel start a pre-discharge alarm and countdown. The panel shuts down HVAC, closes dampers, then opens the cylinder valves. The liquid agent vaporizes through the nozzles and reaches its design concentration — roughly 4–6% — in about 10 seconds. It extinguishes mainly by pulling heat out of the flame. The concentration then has to be held for a set soak time, which is why the room is tested for airtightness with a door-fan (room integrity) test.

Who needs it

Usually an owner or insurer choice rather than a code requirement. It makes sense for enclosed rooms of high-value or business-critical equipment where downtime or water damage would cost more than the system.

Codes, standards and listings

Canada: Designed to NFPA 2001; the alarm interface also falls under CAN/ULC-S524. Use ULC-listed system hardware.
United States: Designed to NFPA 2001; systems listed to UL 2166 (halocarbon systems) and FM Approved. NFPA 2001 and FM Data Sheet 4-9 treat FK-5-1-12 generically, but each manufacturer's hardware is listed only with specific agent sources.

What the market looks like

This is an engineered or pre-engineered installed system, not a product you buy. For years the agent was mostly 3M Novec 1230. 3M announced in December 2022 that it would exit all PFAS manufacturing and says it completed that exit at the end of 2025. The chemical itself, FK-5-1-12, is still supplied by others: Fike sells SF 1230 through Standard Fluids (marketed as a drop-in), Kidde sells Fluoro-K and ANSUL sells SAPPHIRE. Janus Fire Systems and Firetrace also build FK-5-1-12 systems.

Features that actually matter

Total flooding: The whole enclosure is brought to concentration, so the fire is reached wherever it is inside the room — including under raised floors if they are part of the protected volume.
Pre-discharge sequence: Alarm, countdown, HVAC shutdown and damper closure happen before release, giving people time to leave and keeping the agent in the room.
No residue: The agent evaporates, so there is no water or powder cleanup on the equipment.
Room integrity testing: A door-fan test checks whether the room will hold concentration for the required soak time. It is re-evaluated annually under NFPA 2001.

What it really costs

Up front: USD $2–$10 per sq ft protected (≈ CAD $2.75–$13.80). The source's example small server room of 500 sq ft came in at USD $2,000–$4,000; that is a low-end example, not a typical project with full detection and sealing.
Consumables: Recharge after a discharge roughly USD $12–$15 per lb of agent.
What else you'll need: Room sealing, HVAC dampers and shutdowns, the releasing panel tie-in to the building alarm, and the integrity test. No reliable public figure — get quotes.
Over five years: Semiannual and annual service visits under NFPA 2001. No reliable public figure for service contracts — get quotes.

Planning ranges from a US contractor cost guide (getsafeandsound.com), 2025–2026; CAD figures converted from USD at ~1.38 because we found no Canadian source. Real projects with detection, room sealing and integrity testing often exceed the small-room example. Get at least two local quotes.

How it differs from the alternatives

Versus HFC-227ea (FM-200): Same total-flooding method. FK-5-1-12 is not an HFC, so it sits outside the US AIM Act HFC phase-down that is tightening FM-200 supply.
Versus inert gas: Halocarbon systems need far fewer cylinders and no large pressure-relief vents. Inert gas avoids fluorinated chemicals altogether.
Versus pre-action sprinklers: Often used instead of, or alongside, pre-action sprinklers. The gas protects the equipment without water; sprinklers protect the building if the gas cannot hold.

Buying it

Effort Hard

Where: Not sold to end users — designed, installed, room-tested and serviced by each manufacturer's authorized, factory-trained special-hazard distributors.

Lead time: Design, room testing and installation; weeks for a typical room

Ask which FK-5-1-12 source the distributor will use for the fill and future recharges, and confirm that source is listed with the system hardware being installed.

Installing it

Effort Major project

Time: Days on site, after design and room sealing

You'll need: Contractor install

The cylinders and pipe are the easy part. Sealing cable and pipe penetrations, fitting dampers and passing the door-fan test is where projects slip.

Living with it

Effort Moderate

NFPA 2001 calls for a semiannual check of agent quantity and pressure, an annual inspection and test, and an annual re-evaluation of room integrity. Cylinder hydrostatic test intervals follow DOT (US) or Transport Canada rules. Any new cable run through a wall can quietly break the room seal.

If not this, then what

Inert gas (Inergen, Argonite, nitrogen)No PFAS or HFC exposure, at the cost of many more cylinders and pressure-relief venting.
Water mistFar less water than sprinklers and no chemical agent, but listings are hazard-specific.
Pre-action sprinklersKeeps pipes dry until detection confirms a fire. Common alongside, or instead of, a gas system.

Caveats

3M announced in December 2022 that it would exit all PFAS manufacturing and states it completed that exit at the end of 2025. Novec 1230 is no longer made by 3M.
FK-5-1-12 is still supplied by others (Fike SF 1230 via Standard Fluids, Kidde Fluoro-K, ANSUL SAPPHIRE). For a recharge, confirm the agent source is listed with your system's hardware — listings are not interchangeable.
FK-5-1-12 is a fluorinated chemical captured by broad PFAS definitions. We could not confirm whether any US state or Canadian rule currently targets it, but future PFAS restrictions could.
It only works in an enclosure that holds concentration. Open doors, unsealed penetrations or a failed integrity test defeat it.

Our verdict

Still a sound choice for a sealed room full of equipment that water would ruin. The Novec name is gone, not the agent: get the system from an authorized distributor, make sure the recharge agent is listed with your hardware, and budget for keeping the room airtight year after year.

We don't take payment for placement and we don't sell these products. If you think we've got something wrong here, tell us — we'll correct it.

Sources

Need this installed or serviced? Find a licensed contractor near you →

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