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SITCSection 7
U.S. imports of resistance-heated industrial & laboratory furnaces and ovens (SITC 74131) totaled $26.6M in April 2026, traded with 29 countries.
Importers of Resistance-Heated Industrial & Laboratory Furnaces and Ovens paid $1.6M in duties in April 2026 — an effective duty rate of 6.4% on $25.1M in dutiable value, based on actual customs collections rather than the published tariff schedule. Resistance-Heated Industrial & Laboratory Furnaces and Ovens imports of $26.6M in April 2026 ran 53% above the year-to-date monthly average of $17.4M.
Last updated: April 2026 dataResistance heating—passing electrical current through resistive elements to generate heat—is the dominant technology in precision heat-treatment furnaces used for annealing, sintering, tempering, and laboratory thermal analysis. These furnaces offer tight temperature uniformity and programmable profiles that combustion-based alternatives cannot easily match, making them standard equipment in aerospace, semiconductor, and advanced-materials manufacturing. Trade in this category is driven by capital-equipment procurement cycles in high-tech industries, and units often arrive with embedded control systems that may carry separate classification considerations. Section 301 tariff exposure should be evaluated for units sourced from China, as industrial electric furnaces have been among the affected product categories.
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When a programmable controller is built into the furnace as an integral component, the complete unit is generally classified as a furnace under this heading rather than being split between furnace and control-system headings. However, if the controller is imported separately or is a standalone industrial computer, it may warrant independent classification. CBP binding rulings are available to resolve ambiguous configurations before importation.
The heating mechanism is the key distinction: resistance furnaces generate heat through resistive elements energized by current, while induction furnaces induce eddy currents directly in the workpiece or a susceptor. This difference is reflected in separate SITC headings (74131 vs. 74132), and misclassification between the two can result in duty underpayment or overpayment. Technical specifications from the manufacturer confirming the heating method are the primary classification evidence.
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Monthly import values over time