Harmonized System
U.S. exports of HFC-134a & HFC-134 (Tetrafluoroethane Refrigerants) (HS 290345) totaled $8.5M in August 2026.
Importers of HFC-134a & HFC-134 (Tetrafluoroethane Refrigerants) paid $209K in duties in August 2026, an average duty rate of 10.45% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. HFC-134a & HFC-134 (Tetrafluoroethane Refrigerants) imports of $2.0M in August 2026 ran 68% below the year-to-date monthly average of $6.2M.
Last updated: August 2026 dataHFC-134a (1,1,1,2-tetrafluoroethane) is the dominant automotive and stationary refrigerant in this heading, widely used in mobile air-conditioning systems and commercial refrigeration equipment. EPA regulates its import and use under the Clean Air Act's refrigerant management program, and the AIM Act of 2020 established a phasedown schedule for hydrofluorocarbons that directly affects allowance allocations for importers. India is the leading supplier to the US market, with the United Kingdom, Japan, Mexico, and Singapore also contributing meaningfully. The two US tariff lines — 2903451000 for HFC-134a alone and 2903451100 for the combined HFC-134a/HFC-134 provision — require careful attention to product composition at entry.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
15 import shipments a month
The AIM Act directs EPA to phase down the production and import of HFCs, including HFC-134a, through an allowance-based system. Importers must hold sufficient EPA-issued allowances to cover each shipment. The allowance cap decreases over time, so importers should monitor EPA's annual allocation announcements and plan procurement accordingly to avoid compliance shortfalls.
Yes. Line 2903451000 covers pure HFC-134a (1,1,1,2-tetrafluoroethane), while 2903451100 encompasses the combined provision for HFC-134a and HFC-134 (1,1,2,2-tetrafluoroethane). If a shipment contains both isomers, classification under 2903451100 is appropriate. Importers should obtain a certificate of analysis confirming the isomeric composition to support the correct line selection.
Subheading 5 of 41 in heading 2903
Subheading 290345 · $8.5M of $202.0M
ImportsExports
Imports
$2.0MYoY · free account
Exports
$8.5MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $60.7M of HFC-134a & HFC-134 (Tetrafluoroethane Refrigerants) and exported $73.1M.
Through August 2026. Source: U.S. Census Bureau.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 2903451000 | 1,1,1,2-Tetrafluoroethane (Hfc-134a) | $2.0M | 10.45% | 98.58% | $209K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2903451100 | 1,1,1,2-Tetrafluoroethane (Hfc-134a) and Hfc-134 | $8.5M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Trade Directory
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Exports · August 2026
destination
United Kingdom and Mexico together take 81% of it.
customs district
origin
entry
rate provision · imports
1.4% enters free of duty; duty collected equals 10.45% of imports for consumption.