Subheading 8403 10 of the Combined Nomenclature covers central heating boilers other than those of heading 8402, meaning heating boilers designed for heating residential, commercial, and public buildings. The subheading includes condensing and conventional gas boilers, oil boilers, solid fuel boilers (coal, wood, pellet, biomass), and electric boilers, provided they serve the function of central heating with a water circuit. The key classification criterion distinguishing heading 8403 from 8402 is the intended use for building heating at low pressure and temperature parameters, rather than for industrial steam generation. Central heating boilers operate at pressures up to 6 bar and water temperatures up to 90-95°C. Combi boilers (heating and domestic hot water) are also classified under 8403 10. Classification follows GRI rules 1 and 6 and the Notes to Chapter 84. Heat pumps are classified under heading 8418, and electric radiators under heading 8516.

Central heating boilers under subheading 8403 10 are subject to Ecodesign Regulations (EU) No 813/2013 (space heaters) and (EU) No 814/2013 (water heaters) establishing minimum energy efficiency and emission requirements. The Energy Labelling Regulation (EU) 2017/1369 requires an energy label from class A to G. Gas boilers are subject to Regulation (EU) 2016/426 on appliances burning gaseous fuels (GAR), requiring CE marking. Solid fuel boilers are subject to Ecodesign Regulation (EU) 2015/1189. The PED 2014/68/EU may apply to boilers operating above specified pressure thresholds. Import requires an EORI number, customs declaration, EU declaration of conformity, CE marking, energy label, and technical documentation. The Machinery Regulation (EU) 2023/1230 applies to mechanical elements of the fuel feeding system. EMC Directive 2014/30/EU and LVD 2014/35/EU apply to electrical and electronic components.

MFN duty rates for central heating boilers under subheading 8403 10 should be verified in the European Commission's TARIC database. The EU central heating boiler market is a large consumer market with strong competition between European manufacturers and importers from China, Turkey, and Korea. Major European manufacturers include companies from Germany, Italy, France, the Netherlands, and Poland. Preferential tariff rates may be available under FTA agreements subject to compliance with rules of origin. Chapter 84 products are not subject to the CBAM mechanism. The importer should verify in TARIC any anti-dumping duties on boilers from the country of origin. Import of gas boilers from non-EU countries requires verification of compliance with GAR 2016/426 and Ecodesign regulations. Market surveillance authorities actively monitor imported boilers for compliance with efficiency and emission requirements. Import VAT is charged at the national rate. Current rates should be verified in TARIC.