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HSChapter 84
U.S. imports of vapor generating boilers, nesoi, including hybrid boilers (HS 840219) totaled $1.7M in April 2026, traded with 15 countries.
Importers of Vapor Generating Boilers, NESOI, Including Hybrid Boilers paid $114K in duties in April 2026 — an effective duty rate of 15% on $753K in dutiable value, based on actual customs collections rather than the published tariff schedule. Vapor Generating Boilers, NESOI, Including Hybrid Boilers imports of $1.7M in April 2026 ran 30% above the year-to-date monthly average of $1.3M.
Last updated: April 2026 dataHybrid boilers and other vapor-generating units that do not fit the watertube or fire-tube categories — including waste-heat recovery boilers and combined-cycle steam generators — are captured under tariff line 8402190000 as a residual 'not elsewhere specified or included' provision. The NESOI designation means classification here is appropriate only after confirming the unit does not meet the specific criteria of the watertube or fire-tube subheadings. Waste-heat boilers integrated into industrial exhaust systems are a common example, as their design differs fundamentally from conventional fired boilers.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
A hybrid boiler combines elements of both watertube and fire-tube designs, or uses an unconventional heat source such as industrial exhaust gas. Because it does not fit neatly into either the watertube (840211/840212) or fire-tube categories, it defaults to the NESOI provision at 8402190000. Detailed engineering drawings and a manufacturer's classification statement are advisable to support this determination.
Generally yes, if the waste-heat boiler generates steam or other vapor and does not meet the specific design criteria of the watertube subheadings. However, if the unit is an integral part of a larger industrial apparatus (such as a furnace or engine), classification may shift to the heading for that primary apparatus. A functional analysis of the complete system is necessary.
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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 8402190000 | VAPOR GENERATING BOILERS, NESOI, INCLUDING HYBRID | $1.7M | 15.20% | $114K |
VAPOR GENERATING BOILERS, NESOI, INCLUDING HYBRID
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8402190000 | VAPOR GENERATING BOILERS, NESOI, INCLUDING HYBRID | $3.5M |
VAPOR GENERATING BOILERS, NESOI, INCLUDING HYBRID
270 t
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 |
|---|---|---|---|
| Wisconsin | -- | $2.1M | +$2.1M |
| Pennsylvania | $620K | $12K | -$608K |
| Florida | $137K | $374K | +$236K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| WEST PALM BEACH, FL | -- | $2.1M | +$2.1M |
| LAREDO, TX | $453K | $57K | -$395K |
| HOUSTON, TX | $387K | -- | -$387K |