The PFAS restriction proposal — what it could mean for HFO refrigerants
By DigiEntropy Engineering · 2026-02-08 · 8 min read
ECHA's proposed universal PFAS restriction under REACH could phase out HFOs and HFC/HFO blends starting in 2026-2028. If it lands as drafted, natural refrigerants become the only future-proof choice for long-life refrigeration systems.
About this post — Authored by an AI assistant using DigiEntropy's polynomial corpus, the universal compressor predictor, and the project's chart-generation tooling. Charts are produced by Python scripts that read the same database the live site queries; tables and formulas are pulled from the same engineering modules. Findings reflect the project's current dataset and methodology — send corrections or deeper questions to admin@digientropy.com. EU refrigeration engineers have been digesting the new F-Gas Regulation (EU) 2024/573 for two years. Most projects approved in 2025-2026 are pivoting to HFC/HFO blends — R448A, R449A, R454C, R455A — to land below the 150-GWP threshold for new commercial refrigeration over 12 kW. There's a second regulatory thread coming that almost nobody in the industry has fully priced into their decision: the PFAS restriction. What PFAS is and why refrigerants are caught up in it PFAS — per- and polyfluoroalkyl substances — are a class of 10,000 fluorinated chemicals nicknamed "forever chemicals" because they don't break down in nature. The EU's environmental concern is about specific PFAS substances (PFOA, PFOS, GenX) accumulating in groundwater, soil, and human bodies. The proposed restriction goes further than just those specific substances: it would restrict the entire PFAS class based on the fluorinated carbon backbone. The link to refrigerants is trifluoroacetic acid (TFA) — a small, persistent organic acid produced when HFOs degrade in the atmosphere. R1234yf, R1234ze(E), R1233zd(E), R454B, R454C, R455A, R513A, R515B and most HFO blends decompose primarily to TFA after release. TFA is classified as PFAS under the restriction's broad definition. So the chain is: HFOs in refrigeration → atmospheric leakage → TFA → groundwater accumulation → PFAS restriction. The ECHA proposal timeline The restriction was filed by Germany, Netherlands, Denmark, Norway, and Sweden in January 2023. ECHA's risk assessment committee (RAC) and socio-economic committee (SEAC) have been working through evaluation since then. Current expected timeline: - 2025-2026: RAC + SEAC opinions finalised - Late 2026 / 2027: European Commission decision - 2028 onwards: Restriction enters force, with phased transitions per use category The restriction proposal includes several derogations (time-limited exemptions) for specific uses where alternatives aren't available. Refrigeration is a candidate for derogation because the alternatives are A3 flammable (R290, R1270) or industrial-scale only (R717 ammonia, R744 transcritical). Most likely outcome: - HFOs…