HTS 8421.39.01Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof:Filtering or purifying machinery and apparatus for gases: Other

What that translates to:Other air/gas filters and purifiers, e.g. room air purifiers

Also written 84213901. Rates as CBP is collecting them today. Updated Oct 1, 2026.

Country of origin

Other air/gas filters and purifiers, e.g. room air purifiers (HTS 8421.39.01) from China owe 37.5% in total duties as of Oct 1, 2026: no regular duty plus a 12.5% forced-labor tariff (Section 301) and a 25% China tariff (Section 301).

Total duty rate37.5%That's $3,750 on a $10,000 shipment.

Forced-labor tariffSection 301, since Jul 24, 202612.5%

China tariffSection 301, since Jul 6, 201825%

Regular dutyBase rate (MFN) in the tariff scheduleFree

Total duty37.5%

The forced-labor tariff may not apply. The legal text: “articles that are civil aircraft (all aircraft other than military aircraft); their engines, parts and components; their other parts, components and subassemblies; and ground flight simulators and their parts and components, that otherwise meet the criteria of general note 6 of the HTSUS” (HTS 9903.05.88).

The China tariff doesn't apply to “Air purification equipment, electrically powered, weighing less than 36 kg (described in statistical reporting number 8421.39.8015 prior to January 27, 2022; described in statistical reporting number 8421.39.0115 effective January 27, 2022)” (HTS 9903.88.69).

The China tariff doesn't apply to “Disposable plastic filters of a kind suitable for filtering and dehumidifying a patient's breath in a medical device such as a gas analyzer (described in statistical reporting number 8421.39.8090 prior to January 27, 2022; described in statistical reporting number 8421.39.0190 effective January 27, 2022)” (HTS 9903.88.69).

Court status: Challenged at the U.S. Court of International Trade in In re Section 301 Forced Labor Cases, Court No. 26-03555-3JP, before a three-judge panel. The plaintiffs, Learning Resources and others, have moved for judgment on the agency record, arguing that the action (91 FR 47318) exceeds USTR's statutory authority, is arbitrary and capricious, and is pretextual; 25 states, plaintiffs in Court No. 26-cv-03467-3JP, support them as amici (brief filed Sep 11, 2026). No ruling as of Oct 1, 2026, so the rate is unchanged.

Sources: USITC Harmonized Tariff Schedule, Revision 20 (2026); USTR, Notice of Actions in Section 301 Investigations (forced labor), 91 FR 47318, Jul 28, 2026; HTS 9903.05.31; USTR, Notice of Action and Request for Public Comment Concerning Proposed Determination of Action Pursuant to Section 301 (List 1, 25% from Jul 6, 2018), 83 FR 28710, Jun 20, 2018; HTS 9903.88.01.

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Official description

Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: Filtering or purifying machinery and apparatus for gases: Other

Legal text from the Harmonized Tariff Schedule, Revision 20 (2026), chapter 84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof.

Statistical lines

The 10-digit numbers used on entry paperwork. They share this code's duty rates.

8421.39.0105 (8421390105)For machine tools of headings 8456 through 8465, inclusive · reported in kg
8421.39.0115 (8421390115)Other · reported in kg
8421.39.0120 (8421390120)Electrostatic precipitators · reported in No.
8421.39.0130 (8421390130)Other · reported in No.
8421.39.0140 (8421390140)Gas separation equipment · reported in No.
8421.39.0160 (8421390160)Pneumatic fluid power filters, rated at 550 kPa or greater · reported in No.
8421.39.0190 (8421390190)Other · reported in kg

What changed for this code

Jul 24, 2026Forced-labor tariffs start on imports from 60 economies (Section 301)
Jul 22, 202625% Section 301 tariff on products of Brazil starts
Jan 1, 2026Section 301 tariff on Nicaragua starts at 0%, set to rise to 10% in 2027 and 15% in 2028

Questions about HTS 8421.39.01

What is the duty rate for HTS 8421.39.01?

The regular (column 1 general) rate printed in the tariff schedule is Free. Goods from China owe 37.5% in total as of Oct 1, 2026, including any additional tariffs. Additional tariffs depend on the country of origin; choose one above to see its full rate.

Is HTS 8421.39.01 subject to Section 301 tariffs?

Yes, for goods from 85 countries and territories as of Oct 1, 2026, including Algeria, Angola, Argentina, Australia, Austria. Choose a country above to see the rate and any exemptions.

Is HTS 8421.39.01 subject to Section 232 tariffs?

No Section 232 tariff applies to HTS 8421.39.01 as of Oct 1, 2026, from any country of origin.

HTSLookup shows the duties CBP collects on this code by country of origin. Antidumping or countervailing duties may also apply to some exporters; they're set per company and aren't shown.