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HSChapter 84
U.S. imports of industrial-type heat exchange units (HS 841950) totaled $185.7M in April 2026, traded with 70 countries.
Importers of Industrial-Type Heat Exchange Units paid $29.6M in duties in April 2026 — an effective duty rate of 23% on $129.9M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataHeat exchangers are foundational equipment across refining, chemical processing, HVAC, and power generation, and the US tariff schedule carves out brazed aluminum plate-fin heat exchangers (8419501000) as a distinct subheading separate from all other industrial heat exchange units (8419505000). Brazed aluminum plate-fin exchangers are critical components in air-separation plants and LNG facilities, where their high surface-area efficiency and cryogenic performance are unmatched by shell-and-tube designs. Imports of certain heat exchangers from China may be subject to Section 301 tariffs, and the brazed aluminum subheading can also intersect with Section 232 considerations depending on aluminum content and origin.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Brazed aluminum plate-fin (BAPF) exchangers use a vacuum-brazed aluminum core with corrugated fins that achieve extremely high heat-transfer surface area in a compact, lightweight package. They are the preferred technology for cryogenic air separation and natural gas liquefaction, where their performance characteristics differ materially from shell-and-tube or gasketed-plate exchangers. CBP distinguishes them by construction method (vacuum brazing of aluminum) and the plate-fin geometry.
When imported as a standalone unit, a heat exchanger classifies under 841950 regardless of its intended installation in a larger system. If it is imported as an integral component of a complete, assembled refrigeration or HVAC system, GRI 3 analysis may pull it into the system's heading. Importers of knocked-down or partially assembled systems should document the configuration carefully to support the classification.
| Country | Imports | Exports | Balance |
|---|---|---|---|
| CANADA | $18.3M | $37.4M | +$19.1M |
| MEXICO | $30.2M | $21.1M | -$9.1M |
| TAIWAN | $19.1M | $3.7M | -$15.4M |
| GERMANY | $14.0M | $7.1M | -$6.9M |
| UNITED KINGDOM | $14.3M | $6.2M | -$8.1M |
Monthly import values over time
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HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 8419505000 | HEAT EXCHANGE UNITS, NESOI | $139.4M | 22.04% | $22.3M |
| 8419501000 | BRAZED ALUMINUM PLATE-FIN HEAT EXCHANGERS | $46.2M | 25.56% | $7.4M |
HEAT EXCHANGE UNITS, NESOI
BRAZED ALUMINUM PLATE-FIN HEAT EXCHANGERS
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8419500000 | HEAT EXCHANGE UNITS, INDUSTRIAL TYPE | $135.3M |
HEAT EXCHANGE UNITS, INDUSTRIAL TYPE
129.3K no
DIGITAL PROCESSING UNITS, N.E.S.O.I.
HS 847150
PARTS & ACCESSORIES FOR ADP MACHINES & UNITS
HS 847330
PORT DIGTL AUTOMATIC DATA PROCESS MACH NOT > 10 KG
HS 847130
AUTOMATIC DATA PROCESSING STORAGE UNITS, N.E.S.O.I
HS 847170
AUTOMATIC DATA PROCESSING UNITS, N.E.S.O.I.
HS 847180
TURBOJET AND TURBOPROLLER PARTS
HS 841191
| State | Imports | Exports | Balance |
|---|---|---|---|
| Texas | $32.9M | $12.9M | -$20.0M |
| California | $17.9M | $18.3M | +$426K |
| Illinois | $4.9M | $12.2M | +$7.3M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| HOUSTON, TX | $25.8M | -- | -$25.8M |
| LAREDO, TX | $12.4M | $12.0M | -$445K |
| CALEXICO-EAST, CA | $14.5M | $3.2M | -$11.3M |