Other
Automatic regulating or controlling instruments and apparatus; parts and accessories thereof: > Other instruments and apparatus: > Other: > Other > Control instruments for air conditioning, refrigeration or heating systems: > Other
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 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 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(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Products classified under HTS 9032.89.60.25
Electronic Air Handler Defrost Controller
This controller automatically manages defrost cycles in air handlers and refrigeration evaporators by sensing coil temperature and timing defrost to prevent ice buildup. It qualifies for HTS 9032.89.6025 as a specialized automatic control for refrigeration and heating systems. Used in cold storage and HVAC applications.
Chiller Water Temperature Controller
Automatically controls chilled water temperature in commercial HVAC chiller plants by modulating valves and pumps based on supply/return temperature differentials. Classified in HTS 9032.89.6025 for regulating air conditioning system parameters. Used in large building cooling systems.
Zone Heating Valve Controller
Automatically actuates hydronic heating zone valves based on room thermostat demands and boiler status for multi-zone heating systems. Falls under HTS 9032.89.6025 as heating system control apparatus. Common in radiant floor heating installations.
Air Conditioning Economizer Controller
Monitors outdoor air conditions to automatically enable free cooling economizers in rooftop HVAC units when conditions permit, reducing mechanical cooling load. HTS 9032.89.6025 for air conditioning control instruments. Energy-saving feature for commercial buildings.
Digital Thermostat Controller for HVAC Systems
This digital thermostat automatically regulates temperature in air conditioning and heating systems by monitoring ambient conditions and adjusting output to maintain setpoints. It falls under HTS 9032.89.6025 as a control instrument specifically for air conditioning, refrigeration, or heating systems, distinct from general automatic regulators. Designed for residential and commercial HVAC installations.
Refrigeration Pressure Switch Controller
An automatic pressure switch that controls compressor operation in refrigeration systems by monitoring refrigerant pressure and cycling on/off to prevent overload. Classified under HTS 9032.89.6025 for its role in regulating refrigeration systems through automatic pressure control. Commonly used in commercial walk-in coolers.
Variable Frequency Drive for HVAC Fans
A VFD that automatically regulates motor speed in HVAC blower fans based on demand signals from temperature sensors, optimizing energy use in air conditioning systems. Falls under HTS 9032.89.6025 for automatic control of air conditioning parameters. Essential for modern variable air volume systems.
Commercial Refrigerator Humidity Controller
This device automatically maintains humidity levels in commercial display refrigerators by controlling evaporator fans and heater strips based on RH sensors. HTS 9032.89.6025 classification for refrigeration system control instruments. Prevents product dehydration in food retail cases.