NAICS 333415

Overview

The North American Industry Classification System (NAICS) is the framework federal statistical agencies use to classify business establishments so they can collect, analyze, and publish data on the U.S. economy. Created under the Office of Management and Budget, NAICS replaced SIC in 1997 and was jointly developed with Statistics Canada and Mexico’s INEGI to enable cross‑national comparability; the current standard used for economic statistics is the 2022 vintage. ¹

NAICS 333415 covers establishments primarily engaged in manufacturing air‑conditioning (except motor vehicle) and warm air furnace equipment and/or manufacturing commercial and industrial refrigeration and freezer equipment. The U.S. Census Bureau lists illustrative products such as heat pumps; non‑portable humidifiers and dehumidifiers; AC compressors, condensers, and condensing units; refrigerated display cases; and refrigerated drinking fountains. ²

See also on G2X:

• G2X — NAICS 333415 overview
• G2X — NAICS 333414
• G2X — PSC 4110

What this NAICS covers

• Manufacturing of complete air‑conditioning systems (non‑motor vehicle) and warm air furnace equipment. ²
• Production of heat pumps and combination AC/warm air heating units. ²
• Manufacture of AC components such as compressors (non‑motor vehicle), condensers, and condensing units. ²
• Fabrication of commercial/industrial refrigeration and freezer equipment (e.g., walk‑in, reach‑in, or counter/display cases). ²
• Production of refrigerated drinking fountains and soda fountain cooling/dispensing equipment. ²
• Manufacture of stationary (non‑portable) humidifying and dehumidifying equipment. ²
• Specialized machinery such as snow‑making machines used for industrial/commercial applications. ²

Related NAICS and PSC codes

NAICS descriptors and cross‑references per U.S. Census Bureau. ²
PSC titles per the Product and Service Code Manual. ⁴

Key inclusions and exclusions

• Included: Air‑conditioning systems and warm air furnace equipment, commercial/industrial refrigeration and freezers, heat pumps, and non‑portable humidifier/dehumidifier systems. ²
• Excluded: Motor‑vehicle air‑conditioning systems and compressors (classified in NAICS 336391). ²
• Excluded: Portable electric space heaters, humidifiers, and dehumidifiers (classified in NAICS 335211). ²
• Excluded: Furnace air filters (classified in NAICS 333411). ²

Frequently asked questions

• What products typically fall under NAICS 333415?
  Heat pumps; non‑portable humidifiers/dehumidifiers; AC compressors and condensers; refrigerated cases and counters; and refrigerated drinking fountains are listed as illustrative examples for this U.S. industry. ²

• Does NAICS 333415 include installation services?
  No. NAICS is production‑oriented; 333415 classifies manufacturers. Installation and maintenance contracting for plumbing, heating, and air‑conditioning equipment is classified in NAICS 238220. ³

• How is 333415 different from NAICS 333414?
  NAICS 333414 covers heating equipment manufacturing other than electric and warm air furnaces (e.g., boilers, stoves), while 333415 includes warm air furnace equipment and air‑conditioning/refrigeration manufacturing. ²

• Are portable dehumidifiers and humidifiers included in 333415?
  No. Portable electric space heaters, humidifiers, and dehumidifiers fall under NAICS 335211. Stationary, non‑portable humidifying/dehumidifying equipment remains within 333415. ²

• Does 333415 cover motor vehicle air‑conditioning systems?
  No. Motor‑vehicle AC systems and compressors are classified in NAICS 336391, not in 333415. ²

Useful resources

• U.S. Census — Economic Census: NAICS Codes & Understanding Industry Classification Systems (2022 guidance; notes 2022 NAICS vintage). ¹
• U.S. Census — NAICS 333415 industry description and cross‑references. ²
• U.S. Census — Implementation of the 2022 NAICS (vintage and transition timeline). ⁵

References

1. U.S. Census Bureau, Economic Census: NAICS Codes & Understanding Industry Classification Systems (2022 guidance). https://www.census.gov/programs-surveys/economic-census/year/2022/technical-documentation/code-lists/understanding-naics-redirect.html
2. U.S. Census Bureau, NAICS 2022 Industry Detail for 333415. https://www.census.gov/naics/?input=333415&year=2022&details=333415
3. U.S. Census Bureau, NAICS 2022 Industry Detail for 238220. https://www.census.gov/naics/?input=238220&year=2022&details=238220
4. U.S. General Services Administration, Product and Service Code Manual. https://www.acquisition.gov/psc-manual
5. U.S. Census Bureau, The Census Bureau’s Implementation of the 2022 NAICS. https://www.census.gov/library/reference/code-lists/naics/2022/implementation-timeline.html