Boiler Air Preheater from Germany
Rotary or tubular device that preheats combustion air using boiler flue gas heat, reducing fuel consumption. Classified as auxiliary plant under HTS 8404.10.00 for direct use with 8402/8403 boilers. Regenerative designs common for large utility boilers.
Duty Rate — Germany → United States
10%
Rate breakdown
9903.05.3910%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.97, articles the product of a member state of the European Union, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 10 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include airflow/heat transfer calculations calibrated to boiler capacity ratings
• Specify basket or plate materials resistant to acid dew point corrosion
• Avoid general fan heater classification by documenting flue gas duct integration