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HSChapter 84
U.S. imports of instantaneous gas water heaters (HS 841911) totaled $46.4M in April 2026, traded with 13 countries.
Importers of Instantaneous Gas Water Heaters paid $3.8M in duties in April 2026 — an effective duty rate of 10% on $37.2M in dutiable value, based on actual customs collections rather than the published tariff schedule. Instantaneous Gas Water Heaters imports of $46.4M in April 2026 ran 11% below the year-to-date monthly average of $51.9M.
Last updated: April 2026 dataTankless gas water heaters that heat water on demand — without a storage tank — enter under a single US tariff line (8419110000) and serve both residential and light commercial applications where continuous hot water supply and space efficiency are priorities. South Korea leads US supply under this heading, followed by Japan and Mexico, reflecting the strong engineering and manufacturing capabilities of Korean and Japanese appliance brands in this product category. These units are subject to DOE energy efficiency standards and may require compliance with local gas appliance codes (ANSI Z21.10.3), so importers should confirm certification status before shipment.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Instantaneous gas water heaters sold in the US typically require certification to ANSI Z21.10.3 (the standard for gas-fired instantaneous and storage water heaters) by a nationally recognized testing laboratory such as UL or CSA. DOE energy factor or uniform energy factor compliance is also mandatory for residential units. Importers should obtain certification documentation from the manufacturer and confirm that the units are approved for the specific gas type (natural gas or LP) intended for the US market.
Yes. Instantaneous (tankless) gas water heaters under 841911 heat water only as it flows through the unit, with no storage reservoir. Storage-type gas water heaters, which maintain a tank of heated water, are classified under a different provision of heading 8419. The presence or absence of a storage tank — and the unit's rated flow-through capacity versus storage volume — are the key technical facts that determine which subheading applies.
Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| KOREA, SOUTH | $19.7M | $11K | -$19.7M |
| JAPAN | $14.3M | $9K | -$14.3M |
| MEXICO | $9.1M | $989K | -$8.2M |
| CANADA | $110K | $4.8M | +$4.6M |
| VIETNAM | $2.0M | -- | -$2.0M |
Supplier Network
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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 |
|---|---|---|---|---|
| 8419110000 | INSTANTANEOUS GAS WATER HEATERS | $46.4M | 10.36% | $3.8M |
INSTANTANEOUS GAS WATER HEATERS
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8419110000 | INSTANTANEOUS GAS WATER HEATERS | $6.6M |
INSTANTANEOUS GAS WATER HEATERS
5.1K 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 | $18.8M | $2.5M | -$16.4M |
| New Jersey | $10.4M | -- | -$10.4M |
| Texas | $7.1M | $821K | -$6.2M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| LOS ANGELES, CA | $8.6M | $300K | -$8.3M |
| SAVANNAH, GA | $7.7M | -- | -$7.7M |
| NORFOLK-NEWPORT NEWS, VA | $6.3M | -- | -$6.3M |