Chapter 8403 — Customs Tariff Headings
Subheadings
Products classified under Tariff item 84.03
Biomass Pellet Central Heating Boiler
A biomass pellet central heating boiler that automatically feeds and burns wood pellets to provide eco-friendly central heating for homes or small commercial spaces. It is designed specifically for central heating applications and is not a steam-generating boiler of heading 84.02, making it classifiable under this tariff item.
8403.10.00Cast Iron Residential Central Heating Boiler
A cast iron residential central heating boiler designed to generate hot water or steam for distribution through radiators or underfloor heating systems in homes. It is a central heating boiler of heading 84.03, not a steam boiler of heading 84.02, and is therefore classifiable under this tariff item.
8403.10.00Commercial Stainless Steel Central Heating Boiler
A high-capacity stainless steel central heating boiler designed for office building heating systems, providing hot water for radiators or air handling units. It is a central heating boiler of heading 84.03, distinct from steam-generating boilers of heading 84.02, and falls under this tariff item.
8403.10.00Electric-Free Hybrid Central Heating Boiler
A hybrid central heating boiler that combines gas and solar thermal energy for central heating without relying on electric ignition. It is designed for central heating applications and does not generate steam, placing it under heading 84.03 and this tariff item.
8403.10.00Factory-Packaged Modular Central Heating Boiler
A factory-packaged modular central heating boiler that is pre-assembled and shipped ready for installation in commercial settings. It is a complete central heating boiler of heading 84.03, not a steam boiler of heading 84.02, and is classifiable under this tariff item.
8403.10.00Gas-Fired Condensing Central Heating Boiler
A gas-fired condensing central heating boiler that uses natural gas and recovers heat from exhaust gases to preheat incoming water, achieving high efficiency for residential heating. It is a central heating boiler of heading 84.03, not a steam boiler of heading 84.02, and falls under this tariff item.
8403.10.00Low-Pressure Hot Water Central Heating Boiler
A low-pressure hot water central heating boiler operating at under 30 psi, designed to circulate hot water for residential central heating systems. It is a central heating boiler of heading 84.03, not a steam boiler of heading 84.02, and is classifiable under this tariff item.
8403.10.00Modulating Burner Central Heating Boiler
An advanced central heating boiler with a modulating gas burner that adjusts output for efficient heating in residential or commercial settings. It is a central heating boiler of heading 84.03, not a steam boiler of heading 84.02, and falls under this tariff item.
8403.10.00Oil-Fired Central Heating Boiler for Apartments
An oil-fired central heating boiler designed for multi-unit residential buildings, distributing hot water to multiple apartments for central heating. It is a central heating boiler of heading 84.03, not a steam boiler of heading 84.02, and is classifiable under this tariff item.
8403.10.00Steel Wall-Hung Combi Central Heating Boiler
A compact wall-mounted combi central heating boiler that provides both central heating and domestic hot water from a single steel unit. It is a central heating boiler of heading 84.03, not a steam boiler of heading 84.02, and falls under this tariff item.
8403.90.00Boiler Aquastat Control Sensor
A sensor probe that monitors water temperature in central heating boilers, sending signals to control burner operation. It is designed specifically for integration into boiler systems, making it a part of the boiler rather than a standalone control device.
8403.90.00Boiler Circulator Pump Housing
A cast iron housing for the circulator pump used in hydronic central heating boiler systems. It is designed to be mounted within the boiler loop, circulating water as part of the boiler's operation.
8403.90.00Boiler Control Thermostat Module
An electronic thermostat module designed exclusively for regulating temperature in central heating boilers. It integrates into the boiler's control system and is not a general-purpose thermostat.
8403.90.00Boiler Draft Inducer Blower Housing
An aluminum housing for the induced draft fan in gas-fired central heating boilers, promoting proper venting of combustion gases. It is designed with OEM-specific mounting for particular boiler models.
8403.90.00Boiler Low Water Cutoff Switch
An electronic low water cutoff probe switch that shuts down the boiler burner when water levels drop dangerously low. It is specifically designed for central heating boilers to ensure safe operation.
8403.90.00Boiler Pressure Relief Valve
A safety pressure relief valve assembly for central heating boilers, releasing excess pressure to prevent explosions. It is boiler-specific in mounting and calibration, ensuring it functions only within boiler systems.
8403.90.00Boiler Sight Glass Assembly
A glass tube assembly with brass fittings for visually monitoring water levels in central heating boilers. It is designed with boiler-specific pressure ratings and mounting.
8403.90.00Cast Iron Boiler Heat Exchanger
A cast iron heat exchanger designed specifically as a replacement part for central heating boilers not of heading 8402. It transfers heat from combustion gases to water in the boiler system.
8403.90.00Cast Steel Boiler Grate Bars
Replaceable cast steel bars forming the grate in solid fuel central heating boilers, supporting the combustion bed. They are made of a specific alloy for high heat resistance and are designed for boiler use.
8403.90.00Central Boiler Expansion Tank
A pressurized diaphragm expansion tank for absorbing water volume changes in central heating boiler systems. It features boiler-integrated mounting brackets and is designed for boiler operation.
8403.90.00Central Boiler Flue Gas Vent Pipe
A specialized stainless steel vent pipe for exhausting combustion gases from central heating boilers. It is engineered for direct attachment to the boiler exhaust manifold.
8403.90.00Central Boiler Manifold Header
A forged steel header manifold distributing hot water from central heating boilers to heating zones. It has threaded ports specific to boiler sections.
8403.90.00Stainless Boiler Feedwater Valve
An automatic stainless steel valve for maintaining water levels in central heating boilers. It includes a float mechanism specific to boiler pots.
8403.90.00Stainless Steel Boiler Burner Assembly
A stainless steel burner assembly tailored for central heating boilers, controlling fuel combustion. It includes nozzle and ignition components integral to boiler operation.
8403.90.00Steel Boiler Firebox Door
A heavy-duty steel door for accessing the firebox in solid fuel central heating boilers. It includes hinges and seals specific to boiler design.