Market evolution: Central heating boilers (CN 8403) — 2015–2025

Introduction

This report examines the evolution of EU trade in central heating boilers and their parts (customs code 8403) over the period 2015–2025. The product heading encompasses non-electric central heating boilers (840310) and parts thereof (840390), excluding vapour generating and superheated water boilers of heading 8402. Over the decade under review, the EU remained a significant net exporter in this sector, yet the data reveals a structural shift: a sharp contraction in export volumes, a simultaneous rise in import dependency, and a broad escalation in unit prices that has reshaped the trade landscape.

The EU's Fading Trade Surplus: Declining Exports and Growing Import Dependency

The most striking trend in the EU's central heating boiler trade is the persistent erosion of its trade surplus. From a peak of €1.27 billion in 2015, the surplus declined to €735 million in 2025 — a loss of over 42%. This reflects two simultaneous dynamics: a pronounced decline in exports and a steady expansion of imports.

Export volumes fell far faster than export values

EU exports of CN 8403 products declined from €1.70 billion in 2015 to €1.30 billion in 2025, a drop of 23.3% in value terms. However, the contraction in physical volumes was far steeper: export quantity fell from 174,343 tonnes to just 100,052 tonnes, a decline of 42.6%. The difference between these two figures is explained by rising unit prices, which increased by 33.7% over the period, from €9,737/t to €13,017/t. In other words, the EU is shipping considerably fewer boilers and parts abroad, but each unit commands a higher price.

Imports expanded in value while volumes remained broadly stable

On the import side, the picture contrasts sharply. EU import values rose from €428 million to €568 million, an increase of 32.7%. Import volumes, however, grew only 7.2% (from 49,189t to 52,745t), implying that the value increase was largely driven by a 23.8% rise in import unit prices. At the same time, net import reliance — which is negative when the EU is a net exporter — moved from −16.7% to −11.9%, confirming that while the EU remains a net exporter, its external dependency on imports has increased meaningfully.

Domestic production tells a paradoxical story

EU production volumes declined by 30.4%, from 6.5 million items in 2015 to 4.5 million in 2025. Yet production value rose by 47.6%, from €4.82 billion to €7.12 billion. This divergence points to a structural shift in the EU boiler industry toward higher-value products — likely more efficient, higher-capacity, or more technologically advanced units — even as total output contracts. The decline in production volumes may also reflect the accelerating EU policy push toward electrification and heat pumps, which reduces demand for fossil-fuel-based central heating boilers.

A Decade of Rising Unit Prices Across All Segments

Price dynamics are a central feature of the CN 8403 trade story over 2015–2025. Both export and import unit prices rose substantially, but not uniformly across product segments or partners.

Export prices accelerated sharply in the final years

EU export prices for the aggregated CN 8403 heading increased from €9,737/t in 2015 to €13,017/t in 2025. The pace of increase was uneven: prices rose steadily from 2015 to 2021, then jumped more sharply in the 2022–2025 period. The sub-headings reveal important differences: export prices for boilers (840310) rose from €8,616/t to €13,090/t, while parts (840390) remained broadly stable around €12,700–€13,900/t. The convergence of boiler and parts export prices in 2025 is notable and may reflect both inflation and a shift toward premium boiler products.

Import prices followed a similar upward trajectory

EU import prices rose from €8,693/t to €10,761/t, a 23.8% increase. Imported boilers (840310) saw the sharpest price rise, climbing from €9,380/t to €12,344/t — notably, the price of imported boilers in 2023 reached €13,871/t, a level comparable to export prices. Imported parts (840390) rose more moderately, from €7,137/t to €7,688/t. The gap between import and export prices for parts suggests that the EU sources lower-value or standardised parts from third countries, while exporting higher-specification components.

A major price shock affected EU imports from the United Kingdom in 2021

Among supply shock events, the most significant was a price shock in EU imports from the United Kingdom in 2021, with import prices surging by 58.1% (abnormality score of 29.1). This shock represented 15.4% of the total import value share. It likely reflects the combined effects of post-Brexit trade friction, pandemic-related supply disruptions, and rising energy costs in 2021. The UK itself experienced significant price volatility in its import flows, with a coefficient of variation of 0.46, among the highest for EU import partners.

Shifting Trade Partners: The Rise of Neighbouring Suppliers and the Decline of Key Export Markets

The geographic composition of EU trade in CN 8403 products underwent significant restructuring over the period, with distinct dynamics on the import and export sides.

Türkiye dominates EU imports; Western Balkans suppliers gained ground

Türkiye was by far the largest source of EU imports throughout the period, accounting for €306 million in 2025 — more than half of total imports. Its value grew by 34.4% over the decade, though with notable volatility (peaking at €389 million). More striking is the emergence of Western Balkan suppliers: imports from Bosnia and Herzegovina grew by 434% (from €5.4 million to €28.6 million), while imports from Serbia nearly doubled (+93.8%). These shifts suggest growing integration of the Western Balkans into European manufacturing supply chains, likely benefiting from proximity, lower labour costs, and trade facilitation under Stabilisation and Association Agreements.

The import concentration HHI stood at approximately 3,195 in 2025, indicating moderately concentrated imports that have remained broadly stable since 2015. The volume-based HHI declined from 2,968 to 2,348, suggesting that while value concentration persisted, the physical sourcing base diversified somewhat.

The UK remained the top EU export market but its share eroded sharply

The United Kingdom was the EU's single largest export destination throughout the period, but exports to the UK declined from €624 million to €395 million (−36.7%). This decline may reflect post-Brexit trade barriers, UK domestic market shifts, or increased competition from non-EU suppliers in the British market. Exports to Russia also fell sharply (−44.6%), from €169 million to €94 million, likely reflecting the impact of geopolitical sanctions following 2022. In contrast, exports to the United States grew by 19%, reaching €141 million in 2025, making the US the only major export destination to register sustained growth.

Germany and Italy anchored intra-EU production and trade

Among EU Member States, Germany was both the largest importer (€136 million in 2025) and the largest exporter (€308 million), though both flows declined over the period. Italy was the second-largest exporter (€303 million). Notably, Poland's exports grew modestly (+4.7%) while its imports surged (+431%), suggesting Poland is transitioning from a primarily exporting role to one where it also absorbs significant external supply. Ireland's imports grew by 128%, possibly driven by building stock modernisation and housing demand.

In terms of specialisation, Slovakia and Austria displayed the strongest Revealed Comparative Advantage (RSCA of 0.78 and 0.67 respectively), confirming their status as specialised exporters in this sector. By contrast, Ireland, Belgium, and Finland showed negative RSCA values, indicating they are net importers with limited export specialisation.

Conclusion

The EU's trade in central heating boilers (CN 8403) over 2015–2025 is characterised by a paradox: unit values and production values rose substantially, yet the physical volumes of both production and exports contracted sharply. The EU's trade surplus, while still firmly positive, shrank by over 42%, driven by declining export volumes to key markets — particularly the UK and Russia — and a gradual increase in import penetration from Türkiye and emerging Western Balkan suppliers. Rising unit prices, combined with a structural decline in production volumes, point to an industry in transition — likely shaped by the accelerating regulatory shift toward decarbonised heating technologies and away from fossil-fuel-based boilers. The policy environment, including the EU's energy efficiency directives and national heat-pump incentive programmes, appears to be fundamentally reshaping demand for traditional central heating equipment, with the EU's manufacturing base pivoting toward higher-value products even as its overall market footprint contracts.