Gas-to-Gas Boiler Economizer
Air preheater recovering flue gas heat to preheat combustion air for boilers, HTS 8404.10.0050 auxiliary plant. Typically rotary regenerative or tubular recuperative design for gas-fired units.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for general industrial air heating
Non-boiler specific air heaters in heading 8414.
If integral to steam boiler design
Air preheaters built into boiler classified as boiler parts.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Provide combustion air flow/pressure drop data for boiler matching
• Include basket/basket material specs for rotary units
• Distinguish from general HVAC air heaters
Related Products under HTS 8404.10.00.50
Boiler Draft Fan Silencer
Acoustic silencer for induced draft fans in boiler systems, under HTS 8404.10.0050 as auxiliary plant. Reduces noise while maintaining required draft pressure differentials.
Deaerator Spray Valve Assembly
Specialized valve tray assembly for steam deaerators removing dissolved oxygen from boiler feedwater, HTS 8404.10.0050 auxiliary. Critical for corrosion prevention in steam cycles.
Steam Desuperheater Injector
Water spray injector reducing superheated steam temperature in boiler outlet headers, under HTS 8404.10.0050. Attenuation control for process steam requirements.
Condenser Tube Cleaning System
Automated bullet or sponge ball circulation system maintaining condenser tube cleanliness, HTS 8404.10.0050 auxiliary for steam power condensers. Prevents efficiency loss from fouling.
Industrial Superheater Coil Assembly
Tubular coil assembly that superheats steam beyond saturation temperature in boiler systems, falling under HTS 8404.10.0050 as other auxiliary plant for use with boilers. It improves steam quality for turbine efficiency in power generation.
Flue Gas Heat Recovery Unit
Compact unit capturing waste heat from boiler exhaust gases for process heating or power generation, under HTS 8404.10.0050 as other auxiliary boiler plant. Improves overall plant thermal efficiency.