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?
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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
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