Other

CN subheading 842139 is a residual subheading covering filtering or purifying machinery for gases other than intake air filters for internal combustion engines (842131) and oil or fuel filters (842132). This subheading includes air filters for ventilation and air-conditioning systems, HEPA filters for clean rooms, industrial process gas filters, bag-house and electrostatic dust collectors and compressed air filters. Classification follows the General Rules for the Interpretation (GRI), particularly rules 1 and 6. This subheading covers a wide range of filtration equipment used across all industries, construction and medicine. It is essential to distinguish gas filters from liquid filters classified under subheadings 842121 to 842129. For borderline cases Binding Tariff Information (BTI) ruling is recommended.

Importing gas filters under subheading 842139 into the EU requires compliance with the Union Customs Code and technical regulations depending on the filter application. HEPA filters for hospital and laboratory clean rooms must comply with EN 1822 standards for classification and testing of EPA, HEPA and ULPA filters. Ventilation system filters are subject to EN ISO 16890 standards. Industrial dust collectors may be subject to the ATEX Directive (2014/34/EU) when intended for potentially explosive atmospheres. The Machinery Regulation (EU) 2023/1230 applies to complete filtration installations. CE marking and an EU declaration of conformity are required. The importer must hold an EORI number and file a customs declaration. MFN and preferential rates should be verified in TARIC.

Gas filters under subheading 842139 are used across many sectors. In construction and HVAC installations air filters ensure indoor air quality in office, commercial and residential buildings. In medicine HEPA filters are used in operating theatres, laboratories and pharmaceutical clean rooms. Industry uses bag-house and electrostatic dust collectors to clean exhaust gases from production processes. Compressed air filters ensure air quality in pneumatic systems and tools. In the food industry sterilising filters clean air in production zones. Spare parts for filters are classified under 842199. Importers should check preferential rates under EU FTA agreements to reduce import costs for ventilation and filtration equipment.

CN code 8421 39 covers other gas filters. Import requires Machinery Directive 2006/42/EC and relevant EN safety standards compliance. Customs clearance requires CE certificate, technical documentation and manufacturer's declaration of conformity. TARIC duty rates depend on the country of origin. Importers should verify applicable duty rates in the TARIC database and ensure all documentation is complete.