Economizers
Auxiliary plant for use with boilers of heading 8402 or 8403 (for example, economizers, super-heaters, soot removers, gas recoverers); condensers for steam or other vapor power units; parts thereof: > Auxiliary plant for use with boilers of heading 8402 or 8403 > Economizers
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified under HTS 8404.10.00.10
Cast Iron Boiler Economizer
A cast iron economizer designed to recover waste heat from boiler flue gases to preheat feedwater, improving overall boiler efficiency. It is classified under HTS 8404.10.00.10 as auxiliary plant specifically for use with boilers of headings 8402 or 8403. This heat exchanger mounts directly on the boiler exhaust stack.
Steel Tube Boiler Economizer
Finned steel tube economizer that captures residual heat from combustion gases to preheat boiler water, reducing fuel consumption. Falls under HTS 8404.10.00.10 as dedicated economizer auxiliary plant for steam boilers. Features high-pressure tubes rated for industrial boiler exhaust temperatures.
Fire Tube Economizer Module
Modular fire tube economizer with multiple passes for maximum heat transfer from flue gases to boiler feedwater. Specifically engineered as auxiliary equipment for water tube boilers under headings 8402/8403, hence HTS 8404.10.00.10. Includes mounting flanges for direct boiler integration.
Condensing Economizer Unit
Advanced condensing economizer that recovers both sensible and latent heat from boiler exhaust, achieving up to 98% efficiency. Designed exclusively as auxiliary plant for industrial boilers (HTS 8404.10.00.10). Features corrosion-resistant materials for acidic condensate handling.
Industrial Waste Heat Economizer
Heavy-duty economizer for recovering waste heat from large industrial boilers, featuring bare tube and finned sections. Classified under HTS 8404.10.00.10 as essential auxiliary plant for boilers in power generation and manufacturing. Built to withstand high-temperature, high-dust flue gas environments.
Packaged Boiler Economizer Kit
Complete factory-assembled economizer kit including tubes, headers, casing, and mounting hardware for field installation on boilers. Specifically HTS 8404.10.00.10 as auxiliary plant despite kit packaging, due to exclusive boiler application. Includes pre-wired temperature controls.
Stainless Steel Economizer Coils
Corrosion-resistant stainless steel helical coils designed for economizer service in biomass boilers. HTS 8404.10.00.10 classification as boiler auxiliary plant due to specific design for flue gas heat recovery. Rated for alkaline combustion environments.
High-Pressure Economizer Assembly
Heavy wall economizer assembly for high-pressure steam boilers exceeding 1000 psi operation. Engineered specifically as auxiliary plant for power boilers (HTS 8404.10.00.10). Features thick-walled tubes and reinforced headers.
Retrofitted Economizer Insert
Compact economizer insert designed for retrofitting existing boiler stacks to improve efficiency. HTS 8404.10.00.10 as auxiliary plant specifically for boiler exhaust heat recovery. Includes suspension frame and expansion joints.
Modular Economizer Bank
Pre-assembled modular economizer bank with multiple tube circuits for scalable boiler applications. Specifically HTS 8404.10.00.10 auxiliary plant for industrial boilers. Factory leak-tested with interconnection piping.