Guide de Transition des Fluides Frigorigènes — F-Gas, Kigali & NH₃/CO₂/HFO
Choix du fluide en neuf et rétrofit : règlement F-Gas, amendement de Kigali, fluides naturels (NH₃, CO₂, R290) vs mélanges HFO — TCO et sécurité.
From reading to a project decision
- Who this helps
- Owners, developers and procurement teams considering Refrigerant Transition Guide — F-Gas, Kigali & NH₃/CO₂/HFO Decisions.
- Decision supported
- Define product duty, site constraints and comparable scope before selecting equipment or requesting proposals.
- Review status
- A dated technical review is not recorded for every legacy guide. Confirm current product specifications and local requirements with the responsible specialists; no fresh review is implied.
- Free access
- Read, calculate and use checklists without an account, payment or lead submission. Requesting procurement support is optional.
Sizing, temperature and energy checklist
- Record product, packaging, incoming/target temperatures, humidity and permitted excursions from your product specification.
- Record peak stock, daily intake, dwell time, loading schedule and seasonal peaks from your own operating records.
- Confirm grid connection, usable site area, ambient conditions, water and transport interfaces.
- Use declared operating hours, load, tariff and system efficiency; preserve assumptions when comparing scenarios.
- Have the refrigeration engineer and responsible food/pharma quality lead verify the scope before equipment selection.
Destination, season & logistics checklist
A project evidence checklist, not a seasonal forecast. Complete it for each destination using dated operating records, product specifications and responsible local specialists.
- Destination & handoffs
- Record origin, destination, transport mode, loading/unloading points, planned transit and expected waiting time. Identify who monitors temperature and handles excursions at each handoff.
- Season & peak capacity
- Record actual peak months, daily intake, dispatch, dwell time and highest stock from dated records. Label forecasts separately; do not turn an annual national trade indicator into a monthly demand estimate.
- Temperature & energy duty
- Use the product's approved temperature range, incoming temperature, packaging and loading schedule. Record site ambient assumptions, door-opening frequency, power availability and tariff period for capacity and energy comparisons.
- Site & unresolved risks
- Confirm grid, water where required, vehicle access and dock interfaces. Record the evidence owner, source date and unresolved constraint; leave unknown inputs blank rather than presenting them as verified.
Related source material: FAO post-harvest handling manual for food handling context; existing distribution planning guide and site due diligence checklist. This checklist does not establish a food/pharma specification, legal approval or engineered capacity.
Reference library, not verification of every legacy claim: FAO post-harvest management · WHO pharmaceutical temperature mapping, May 2015 · Official regulatory sources. Calculators are preliminary scenarios, not engineering certification or guaranteed results.
Regulatory clock
EU F-gas (2024 revision) bans most HFCs >150 GWP in new commercial refrigeration by 2030; service bans on R404A already effective. Kigali locks in an 85% HFC phase-down for developed countries by 2036, 80% for A5 group 1 by 2045. Anyone buying R404A/R507 today is buying stranded capex.
Natural refrigerant decision matrix
Load >300 kW & industrial site: NH₃ low-charge (best OPEX, needs safety zoning and trained staff). Load 100–300 kW: NH₃/CO₂ cascade or CO₂ transcritical. Retail / small commercial: propane (R290) packaged or CO₂ transcritical. Occupied spaces where NH₃ prohibited: CO₂ transcritical + subcritical boosters, or HFO blend as bridge.
HFO blends — bridge only
R448A, R449A, R452A cut GWP ~65% vs R404A but still face phase-down and are 3–5× the price of naturals long-term. Use only for near-term retrofits where full plant replacement is 5+ years out.
Safety & permitting
NH₃: EN 378 / ANSI IIAR classification, machinery room ventilation, gas detection, competent-operator training. CO₂ transcritical: pressure certification (>90 bar), pressure relief design, dew-point management. R290: charge limits (150 g in most jurisdictions, higher with EN 60335-2-89 amendments), ATEX for machinery room.
TCO horizon
Over 15-year plant life, NH₃ low-charge or NH₃/CO₂ cascade is 20–35% cheaper than HFO blend for industrial loads. CO₂ transcritical wins in temperate climates and pushes ahead further as electricity prices rise. HFO always loses on refrigerant quota cost by year 8.
Questions fréquentes
Can I still buy R404A equipment in 2026?
In the EU, no for new systems. In non-EU markets, yes but the F-gas ripple + Kigali quota means refrigerant price will spike 4–8× by 2030. Not a sound capex decision.
Is CO₂ transcritical really viable above 40°C ambient?
Yes with parallel compression and ejectors, but efficiency gap vs NH₃/CO₂ cascade widens. Above ~40°C design ambient (Gulf, Sahel, tropical), cascade wins. Below 32°C ambient, transcritical is the default for new frozen DCs.
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