North American Industry Classification System
U.S. imports of Automatic Environmental Controls for Residential, Commercial & Appliance Use (NAICS 334512) totaled $171.6M in August 2026, imported from 78 countries.
Importers of Automatic Environmental Controls for Residential, Commercial & Appliance Use paid $12.1M in duties in August 2026, an average duty rate of 7.01% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 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.
10.2K import shipments a month
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 · August 2026
origin
Mexico and Canada together supply 54% of it. China pays 35.7% duty; Canada 0.9%.
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.
National industry 9 of 9 in naics industry 33451
National industry 334512 · $171.6M of $6.6B
ImportsExports
Imports
$171.6MYoY · free account
Exports
$142.3MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $1.9B of Automatic Environmental Controls for Residential, Commercial & Appliance Use and exported $1.5B.
Through August 2026. Source: U.S. Census Bureau.