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HSChapter 84
U.S. imports of central heating boilers (HS 840310) totaled $19.2M in April 2026, traded with 19 countries.
Importers of Central Heating Boilers paid $4.2M in duties in April 2026 — an effective duty rate of 24% on $17.6M in dutiable value, based on actual customs collections rather than the published tariff schedule. Central Heating Boilers imports of $19.2M in April 2026 ran 12% below the year-to-date monthly average of $21.8M.
Last updated: April 2026 dataHot-water central heating boilers — the type installed in residential and commercial buildings to supply radiators or underfloor heating circuits — are classified under tariff line 8403100000, separate from the industrial steam and superheated water boilers of heading 8402. Condensing gas boilers, oil-fired boilers, and combination (combi) boilers all fall here provided they are designed for space heating rather than industrial steam generation. European manufacturers are prominent suppliers of high-efficiency condensing boiler technology, and importers should verify compliance with applicable energy efficiency and safety standards (such as ASME or ANSI ratings) required by US state and local codes.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Yes, combination boilers designed primarily for central heating service classify under 8403100000 even if they also supply domestic hot water. The central heating function governs classification. If a unit is designed primarily as a water heater with an incidental heating function, it may instead fall under heading 8419 or 8516, so the manufacturer's primary design intent is the determining factor.
While there is no single federal product approval for heating boilers, many US states and localities require compliance with ASME Boiler and Pressure Vessel Code standards, and efficiency ratings may need to meet Department of Energy minimum standards for commercial boilers. Importers should confirm applicable state-level requirements and obtain relevant certifications before distribution.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| CANADA | $5.4M | $5.8M | +$444K |
| KOREA, SOUTH | $6.0M | $139K | -$5.9M |
| LIECHTENSTEIN | $2.8M | -- | -$2.8M |
| ITALY | $1.1M | -- | -$1.1M |
| CHINA | $1.0M | -- | -$1.0M |
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 |
|---|---|---|---|---|
| 8403100000 | CENTRAL HEATING BOILERS | $19.2M | 24.03% | $4.2M |
CENTRAL HEATING BOILERS
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8403100000 | CENTRAL HEATING BOILERS | $6.4M |
CENTRAL HEATING BOILERS
1.6K 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 |
|---|---|---|---|
| California | $4.6M | $273K | -$4.3M |
| Georgia | $1.1M | $2.2M | +$1.1M |
| New Jersey | $3.0M | $162K | -$2.8M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| NEWARK, NJ | $5.4M | $74K | -$5.3M |
| BUFFALO-NIAGARA FALLS, NY | $1.2M | $1.5M | +$267K |
| PORT HURON, MI | $1.6M | $1.1M | -$522K |