Other
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 > Other: > Other: > Other
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Products classified under HTS 8421.39.01.90
HEPA Air Purifier Filter Unit
A high-efficiency particulate air (HEPA) filter unit designed for removing airborne particles, dust, and pollutants from indoor air in residential or commercial spaces. It falls under HTS 8421.39.0190 as other filtering or purifying machinery for gases, specifically for air purification not classified elsewhere in the heading.
Activated Carbon Gas Adsorber
An industrial adsorber using activated carbon media to remove volatile organic compounds (VOCs) and odors from exhaust gases in manufacturing plants. Classified under HTS 8421.39.0190 as other gas purifying apparatus employing adsorption for air treatment.
Commercial Kitchen Grease Vapor Filter
A baffle-style filter system capturing grease particulates and vapors from cooking exhaust in restaurant hoods to prevent fire hazards and odors. It qualifies under HTS 8421.39.0190 for other gas filtering machinery in food service applications.
HVAC Electrostatic Air Cleaner
An electrostatic precipitator module for HVAC systems that charges and collects fine dust particles from recirculated building air. Falls under HTS 8421.39.0190 as other purifying apparatus for gases using electrostatic filtration.
Odor Control Biofilter Module
A biological filter using microbial beds to degrade odorous gases like H2S in wastewater treatment plants. Classified in HTS 8421.39.0190 for other gas purifying machinery employing biofiltration.
Portable Welding Fume Extractor
A mobile filtration unit with flexible arm capturing and filtering toxic metal fumes from welding operations in workshops. It is covered by HTS 8421.39.0190 as other gas filtering apparatus for industrial safety.
Dust Collector Cartridge Filter
High-performance pleated cartridge filters for baghouse dust collectors removing fine particulates from industrial process gases. Under HTS 8421.39.0190 as other filtering machinery for gases in manufacturing.
VOC Abatement Regenerative Thermal Oxidizer Filter
Pre-filter stage for regenerative thermal oxidizers (RTOs) capturing particulates before thermal destruction of VOCs in paint shop exhaust. Classified HTS 8421.39.0190 for other gas purifying apparatus.
Cleanroom Laminar Flow Filter Module
HEPA filter ceiling modules providing laminar airflow in ISO cleanrooms for contamination control. Falls under HTS 8421.39.0190 as other gas filtering for controlled environments.
Gas Turbine Inlet Air Filter
Coarse and fine multi-stage filters protecting gas turbine compressors from dust and salt in power generation plants. Classified under HTS 8421.39.0190 as other gas filtering apparatus.
Pharmaceutical HVAC Terminal Filter
Terminal HEPA filters for pharma cleanrooms ensuring sterile air for tablet pressing and filling lines. HTS 8421.39.0190 for other gas purifying in controlled pharma environments.
Mining Ventilation Dust Filter
High-capacity pleated filters for underground mine ventilation shafts scrubbing silica dust from worker breathing air. Under HTS 8421.39.0190 as other gas filters for harsh environments.
Laboratory Fume Hood Filter
Carbon and HEPA combination filters for ductless fume hoods capturing chemical vapors in research labs. Classified HTS 8421.39.0190 for other lab gas purifying apparatus.
Data Center Precision Air Filter
ULPA filters for data center CRAC units maintaining low particle counts for server reliability. HTS 8421.39.0190 for other high-tech gas filtration.
Marine Engine Exhaust Scrubber Filter
Demister pads and particulate filters in SOx scrubbers for ship exhaust meeting IMO sulfur regulations. Under HTS 8421.39.0190 as other marine gas purifying.