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HSChapter 84
U.S. imports of instantaneous gas water heaters (HS 841911) totaled $54.2M in July 2026, traded with 16 countries.
Importers of Instantaneous Gas Water Heaters paid $4.4M in duties in July 2026 — an effective duty rate of 11% on $40.9M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: July 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.
570 shipments/mo
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.
Subheading 5 of 14 in heading 8419
Subheading 841911 · $54.2M of $1.0B
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8419110000 | Instantaneous Gas Water Heaters | $54.2M | 8.17% | 75.51% | $4.4M |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8419110000 | Instantaneous Gas Water Heaters | $8.6M |
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.
ImportsExports
Imports
$54.2MYoY · Pro
Exports
$8.6MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
Korea, South and Japan together supply 74% of it.
customs district
destination
entry
rate provision · imports
24.5% enters free of duty; the effective duty rate is 8.17%.