Market evolution: Central heating boilers (CN 840310) — 2015–2025

Introduction

Central heating boilers classified under CN 840310 encompass non-electric boilers used for space heating, excluding vapour-generating and superheated-water boilers of heading 8402. The product group bundles two sub-categories: cast-iron boilers (84031010) and all other non-electric boilers (84031090). Over the 2015–2025 period, the EU's external trade in this product group underwent a fundamental transformation: export volumes collapsed while unit prices surged, import sourcing shifted geographically, and EU production pivoted decisively from quantity to value. This report examines these dynamics across three dimensions—volume and pricing trends, geographic realignment, and structural production changes—and draws out their implications for the EU's competitive position in global boiler markets.

1. A Decade of Shrinking Volumes and Rising Unit Values

Export volumes fell by more than half while values declined by only a third

The most striking feature of the 2015–2025 period is the dramatic contraction in EU export volumes. Total exports fell from 130,791 tonnes in 2015 to 59,177 tonnes in 2025—a decline of 54.8%. Yet the corresponding value contraction was far more moderate: export value dropped from €1.127 billion to €775 million, a decline of only 31.3%. The explanation lies in a near-continuous rise in unit export prices, which climbed from €8,616/tonne in 2015 to €13,090/tonne in 2025 (+51.9%).

The EU thus remained a net exporter throughout the period, with a net import reliance that was negative at −15.9% in 2015 and −8.1% in 2025. However, the trade surplus shrank by 57.2%, from €807 million to €345 million, reflecting the asymmetric nature of the volume and price trends on the export side versus the import side.

Cast-iron boiler exports collapsed almost entirely

The aggregate figures mask a striking divergence between the two sub-product categories. Cast-iron boiler exports (84031010) went from 31,166 tonnes and €139 million in 2015 to just 3,518 tonnes and €24 million in 2025—a collapse of 88.7% in volume and 83.1% in value. By contrast, non-cast-iron boiler exports (84031090) declined from 99,625 tonnes to 55,659 tonnes (−44.1% in volume), but their unit price rose from €9,912/tonne to €13,492/tonne (+36.1%), cushioning the value decline to 23.9%.

This indicates that the EU largely exited the lower-value cast-iron boiler export market, concentrating instead on higher-specification, non-cast-iron boilers where it retains a pricing advantage.

Import prices rose in parallel, but import volumes held steady

On the import side, total volumes were remarkably stable—moving from 34,124 tonnes to 34,805 tonnes (+2.0%)—but import values rose by 34.2%, driven by unit price increases from €9,380/tonne to €12,344/tonne (+31.6%). Here too, the cast-iron/other split is informative: cast-iron boiler imports (84031010) dropped from 5,566 tonnes to 2,200 tonnes, while non-cast-iron imports (84031090) grew from 28,557 tonnes to 32,605 tonnes. The non-cast-iron segment thus became even more dominant in EU imports, rising from 83.7% to 93.7% of import volume.

2. Geographic Reorientation: Diversifying Sources, Losing Traditional Destinations

Top export destinations contracted sharply, with China and Türkiye showing the steepest declines

The EU's top export partners all recorded declines over the decade, but with markedly different trajectories. The United Kingdom, the single largest destination, saw exports fall from €363 million to €215 million (−40.8%). Russia—the second-largest market—declined from €148 million to €91 million (−38.5%), a trajectory that accelerated after 2022 likely reflecting geopolitical sanctions. China (-67.7%) and Türkiye (-61.1%) recorded the most dramatic proportional contractions.

Notably, the United States was the only major partner to record export growth (+31.9%), and also showed relatively low volatility (CV of 0.19), making it an increasingly reliable destination. Ukraine, despite the ongoing conflict, maintained roughly stable export values (−2.2%), though with high volatility (CV of 0.31).

Türkiye consolidated its dominance as the EU's import supplier

On the import side, Türkiye tightened its position as the overwhelmingly dominant supplier, growing from €215 million (67.2% of total imports) to €281 million (65.5%), with remarkably low price volatility (CV of 0.11). The United Kingdom held second position with modest growth (from €26 million to €27 million, +3.8%), though its import flows showed much higher volatility (CV of 0.57).

Several smaller partners showed explosive growth: Bosnia and Herzegovina (+952.4%), Ukraine (+2,101.8%), and Serbia (+128.9%) all emerged as meaningful suppliers. These Western Balkan and Eastern European sources remain, however, highly volatile—Bosnia's coefficient of variation stands at 0.82—and together still represent a small fraction of total EU imports relative to Türkiye.

EU member-state import demand shifted eastward

Among EU member states, Germany remained the largest importer by value (€121 million in 2025, down from €132 million in 2015), but the most dramatic growth came from Poland, which surged from €7.2 million to €42.1 million (+486.1%). Romania (+68.5%) and Italy (+62.8%) also showed strong growth. On the export side, Germany (€379 million to €237 million, −37.4%) and Austria (€81 million to €38 million, −53.0%) recorded the steepest declines among major exporters. The concentration of exports across member states also decreased: the export HHI fell from 1,532 to 1,212 (−20.9%), indicating a modest broadening of the exporter base.

3. Production Shift: Fewer Units, Higher Value, and Regional Specialisation

EU production volume declined while production value increased

EU production data reveals a structural transformation over the decade. The number of boilers produced fell from approximately 6.5 million items to 4.5 million items (−30.4%), yet the total production value rose from €4.06 billion to €4.92 billion (+21.1%). This implies that the average production value per unit roughly doubled over the period, consistent with a market shift toward more technologically advanced (e.g., condensing, hybrid, or hydrogen-ready) boilers, and away from commodity cast-iron products.

Specialisation is concentrated in Central European member states

In 2025, the EU member states with the highest revealed comparative advantage in CN 840310 exports were:

Slovakia and Austria stand out with both high specialisation indices and substantial production shares, suggesting deep integration of boiler manufacturing into their industrial bases. Italy, with the largest production share (18.8%), combines this with meaningful but lower specialisation, consistent with its broader machinery portfolio. At the other end, countries like Cyprus (RSCA of −0.999), Ireland (−0.951), and Belgium (−0.875) show no specialisation in this product, relying almost entirely on imports.

Import concentration remains moderate and slowly declining

The import-side HHI by value fell from 4,838 to 4,486 (−7.3%) between 2015 and 2025, remaining in the range of moderate concentration. By volume, the decline was steeper (from 4,806 to 3,390, −29.5%), indicating that while Türkiye's value share held steady, smaller suppliers gained volume share. The persistence of the EU's net exporter status (net import reliance of −8.1% in 2025) suggests that domestic production continues to serve the bulk of internal demand, though the margin is narrowing.

Conclusion

The EU's trade in central heating boilers (CN 840310) over 2015–2025 tells a story of structural transition rather than simple decline. Export volumes fell by more than half, but this was largely a retreat from lower-value cast-iron products, while unit prices rose by over 50%. EU production similarly pivoted: 30% fewer boilers were produced, but total output value increased by over 20%, signalling an industry-wide shift toward higher-specification products—likely driven by decarbonisation policies, the phase-out of fossil-fuel boilers (notably the EU's proposed regulations for heating appliances), and a move toward condensing and hybrid technologies. Geographically, the EU's export market narrowed significantly, with the UK, Russia, China, and Türkiye all contracting, while the US emerged as a rare growth market. On the import side, Türkiye's dominance held firm, and Western Balkan suppliers (Serbia, Bosnia and Herzegovina) emerged as fast-growing but volatile sources. The EU's trade surplus, while still positive, shrank by 57%—a reminder that the region's competitive edge in this product group, though still substantial, is being progressively eroded by the combination of falling volumes and rising import competition.