Clean Agent Choice Before the 2028 HFC Freeze
This post argues that the 2028 HFC freeze should not by itself decide which clean agent goes into a server room or control room, because the freeze caps national supply and is not a deadline for installed systems, and because the two common agents face different clocks.[1][3] HFC-227ea sits under a tightening treaty cap that counts its high global warming potential. FK-5-1-12 sits outside that list, and its risk was a change of supplier, which an industry body says has eased.[2][10][11]
Our brief assumed that a buyer must choose an agent before the freeze. The sources support a narrower claim: the freeze is a good reason to ask supply and service questions in writing, and not a reason to rule an agent out. Datasheet values below are Honeywell Buildings India’s own figures and we have not tested them.
The 2028 date is a cap on national supply, not a deadline for installed systems
The Kigali Amendment adds hydrofluorocarbons to the Montreal Protocol. India is in Group 2 of the developing-country (Article 5) Parties. The Ozone Secretariat gives the Group 2 base level as the average HFC level for 2024 to 2026 plus 65 per cent of the HCFC baseline. The freeze starts on 1 January 2028, followed by a 10 per cent reduction on 1 January 2032, 20 per cent on 1 January 2037, 30 per cent on 1 January 2042 and 85 per cent on 1 January 2047.[1] The Ozone Secretariat’s India profile lists ratification of the Amendment on 27 September 2021.[4]
The obligation is written for Parties. Article 2J limits each Party’s calculated consumption of the Annex F substances, expressed in carbon dioxide equivalents, to a percentage of its baseline. For Group 2 countries the Amendment’s Article 5 paragraph 8 qua sets that percentage at 100 per cent for 2028 to 2031, then 90 per cent for 2032 to 2036, 80 per cent for 2037 to 2041, 70 per cent for 2042 to 2046 and 15 per cent from 2047.[3] We found nothing in the Amendment text that bans the use of equipment already installed. The Ozone Secretariat lists India as having an HFC licensing system, reported on 21 March 2022.[4] How the national cap reaches buyers depends on India’s own implementing rules, which we did not read, so we cannot say how it will affect the price or availability of a refill.
HFC-227ea counts against the cap at 3,220 times carbon dioxide
Annex F lists HFC-227ea with a 100-year global warming potential of 3,220.[2] Honeywell’s datasheets give the same figure.[6][7] Because the cap is set in carbon dioxide equivalents, each kilogram of HFC-227ea uses more of the allowance than a lower-potential substance would. That is our inference from how the cap is written. We found no sourced data on how much of India’s HFC demand is fire suppression, or on refill prices, so we cannot estimate any price effect and we do not claim one.
A buyer of an HFC-227ea system is therefore buying a fixed installation and a future refill. The refill is the part that depends on supply after 2028. For a data centre or control room that expects to keep a room protected for many years, the question to ask is who will recharge the system, from what stock, and on what terms. Our posts on the integrated BMS and BMS design for a control room make the same argument for lifetime support over launch price.
FK-5-1-12 sits outside Annex F, but its risk was a supplier decision
We did not find FK-5-1-12 in the Annex F list of controlled substances. The list names the hydrofluorocarbons, including HFC-227ea.[2] FK-5-1-12 is a fluorinated ketone and Honeywell’s sheet gives it a global warming potential of 1 and an atmospheric lifetime of 5 days.[8][9] On our reading, its use would not draw on the Kigali allowance, but that rests on absence from the list and not on a source that says so, and we flag it as unconfirmed.
The separate risk was supply. On 20 December 2022, 3M announced that it would exit PFAS manufacturing by the end of 2025, including fluorinated fluids, while intending to meet current contractual obligations during the transition.[10] The Fire Suppression Systems Association, a US trade body, wrote in October 2023 that FK-5-1-12 is the ASHRAE name for Novec 1230 fluid, that 3M’s patent on its fire-protection use expired in July 2020, and that at least 13 entities held a UL component recognition for it.[11] It concluded that supply was not the issue and that the agent remained acceptable under the US EPA SNAP programme and NFPA 2001.[11]
Treat that conclusion with care. The author is a trade body whose members sell these systems, the piece is three years old, and we could not confirm that 3M completed its exit or what it did to the market. We also did not assess PFAS rules in India. The blog is about the United States, so it says little about whether an Indian buyer will find the agent from several sources.
Datasheet values put FK-5-1-12 at lower design concentrations and far lower global warming potential
| Property (Honeywell datasheet value) | HFC-227ea | FK-5-1-12 (FK 1230) |
|---|---|---|
| Formula and name | CF3CHFCF3, heptafluoropropane | CF3CF2C(O)CF(CF3)2, dodecafluoro-2-methylpentan-3-one |
| Molecular weight | 170.03 | 316.04 |
| Boiling point at 1 atm | -16.4 °C | 49.2 °C |
| Class A minimum extinguishing and design concentration | 5.2 and 6.7 | 3.3 and 4.0 |
| Class B minimum extinguishing and design concentration | 6.7 and 8.7 | 4.5 and 5.9 |
| Class C design concentration | 7.0 | 4.5 |
| Ozone depletion potential | 0 | 0 |
| Global warming potential (100 years) | 3,220 | 1 |
| Atmospheric lifetime | 31 to 42 years | 5 days |
| No observed adverse effect level | 9 per cent (42 bar sheet) | 10 per cent |
| Listed in Annex F of the Kigali Amendment | Yes, GWP 3,220 (Ozone Secretariat) | Not in the list we read |
We have not compared price, footprint or agent mass. The sheets give concentrations, not the mass of agent needed for a given room, and a lower design concentration does not by itself mean a smaller system. Honeywell’s product page describes its FK-5-1-12 system as super-pressurised, enabling longer pipe runs and smaller pipe diameters, and says its cylinders are PESO-approved for both agents at 25 bar and 42 bar. We have not verified those claims.[5]
The datasheets disagree with themselves in places, so verify the design values
Two things stood out. First, the 25 bar HFC-227ea sheet prints a no observed adverse effect level of 10.5 per cent and a stray figure of 9 per cent against a second atmospheric-lifetime row, while the 42 bar sheet gives 9 per cent for the no observed adverse effect level and 10.5 per cent for the lowest observed adverse effect level.[6][7] We used the 42 bar sheet’s figures, which fit the row labels, and the mismatch is a reason to ask the supplier which is right. Second, the cylinder tables on all four sheets carry identical fill ranges, heights and diameters for both agents, even though the two agents have very different molecular weights.[6][7][8][9] We have not used them.
Our point is not that the manufacturer is wrong. Datasheets of this kind are marketing documents with design software behind them. The design concentration, agent mass and discharge time for a given room come from the manufacturer’s listed flow calculation, checked against the standard it cites. A project should use that calculation and not a table such as ours.
One monitoring detail is worth a line for building teams. Honeywell describes a switch-in-gauge unit that lets cylinder pressure be monitored remotely through a fire alarm panel interface or another control panel, and a discharge pressure switch that can signal a control panel that the system has discharged.[6][7][8][9] Whether those signals reach the building management system is a project decision. Our post on fire alarm design covers why that integration should be written down.
Questions to put to a supplier in writing
- Which agent is proposed, and from how many qualified sources can it be bought over the life of the system?
- Who will recharge the system after a discharge, from which stock, and with what lead time?
- Which Indian rules on HFC licensing, import or recharge apply to this purchase, and how will the supplier comply?
- What certificate of analysis or listing documents accompany a refill?
- Which signals from the cylinders and release panel reach the building management system?
Protecting a data centre or critical equipment room? Ask Trisim Global Solutions about Honeywell gas suppression solutions.
Sources
- Ozone Secretariat (UNEP), Annex F: Hydrofluorocarbons (phase-down schedule, Article 5(1) Parties, Group 2), Montreal Protocol handbook page
- Ozone Secretariat (UNEP), Annex F: Controlled substances (list with 100-year global warming potentials), Montreal Protocol handbook page
- Ozone Secretariat (UNEP), The Kigali Amendment (2016): the amendment to the Montreal Protocol agreed by the Twenty-Eighth Meeting of the Parties (text), 15 October 2016
- Ozone Secretariat (UNEP), Country profile: India (status of ratification of the Kigali Amendment), accessed October 2026
- Honeywell Buildings India, Clean Agent Fire Suppression System (product page), accessed October 2026
- Honeywell Buildings India, UL Listed 25 bar HFC-227ea Clean Agent System (datasheet), accessed October 2026
- Honeywell Buildings India, UL Listed 42 bar HFC-227ea Clean Agent System (datasheet), accessed October 2026
- Honeywell Buildings India, UL Listed 25 bar FK 1230 (FK-5-1-12) Clean Agent System (datasheet), accessed October 2026
- Honeywell Buildings India, UL Listed 42 bar FK 1230 (FK-5-1-12) Clean Agent System (datasheet), accessed October 2026
- 3M Company, 3M to Exit PFAS Manufacturing by the End of 2025 (press release), 20 December 2022
- Fire Suppression Systems Association (FSSA, a US trade body), Differentiating PFAS Series: Should I Be Worried About the Future of Novec 1230?, 7 October 2023