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NAICSSector 33
U.S. imports of automatic environmental controls for residential, commercial & appliance use (NAICS 334512) totaled $161.1M in July 2026, traded with 77 countries.
Importers of Automatic Environmental Controls for Residential, Commercial & Appliance Use paid $10.8M in duties in July 2026 — an effective duty rate of 14% on $76.1M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: July 2026 dataThermostats, humidistats, and programmable HVAC controllers — the core products of NAICS 334512 — serve as critical interface components in residential and commercial building systems, and their trade volumes track closely with construction and appliance replacement cycles. Smart and connected thermostats have expanded this sector's import footprint significantly, with a substantial share of finished units and PCB assemblies sourced from Asia. Section 301 tariffs affect many of these products when originating from China, and importers should confirm whether their specific HTS subheading is covered. Energy-efficiency labeling requirements under DOE or FTC rules may also apply to certain programmable control products.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
10.1K shipments/mo
National industry 9 of 9 in naics industry 33451
National industry 334512 · $161.1M of $7.1B
Yes — the HTS classification of a thermostat depends on its operating principle and primary function. Electronic programmable and smart thermostats with microprocessor control typically fall under different HTS provisions than simple bimetallic or electromechanical thermostats. The distinction affects both the base duty rate and Section 301 exposure, so product-specific classification review is recommended.
Certain programmable thermostats and HVAC controls may be subject to DOE energy-efficiency standards or FTC Energy Guide labeling requirements when sold in the US market. While these are primarily market-access rules rather than customs-entry requirements, non-compliant products can be detained or refused entry if they are flagged during CBP examination.
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Imports · July 2026
origin
Mexico and Malaysia together supply 54% of it.
customs district
Census does not publish district detail for this classification system.
destination
Census publishes state breakdowns for NAICS to the 4-digit level only. See NAICS 3345 for those.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$161.1MYoY · Pro
Exports
$155.0MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.