NAICS 333414

Overview

The North American Industry Classification System (NAICS) is the federal standard for classifying U.S. business establishments to support consistent collection, analysis, and publication of economic statistics. Developed under the Office of Management and Budget with Canada and Mexico, NAICS replaced SIC in 1997 and is revised on a five-year cycle; the current vintage is 2022. ¹

NAICS 333414 covers the manufacturing of heating equipment other than electric and warm air furnaces—examples include building heating boilers, non‑electric heating stoves, floor and wall furnaces, and permanently installed wall/baseboard heating units. Agencies and statistical programs use this code within Manufacturing (31–33) when compiling industry-level data and tabulations. ²

See also on G2X:

• G2X — NAICS 333414 overview
• G2X — NAICS 333415
• G2X — NAICS 332410

What this NAICS covers

• Manufacturing of non‑power, space‑heating boilers (e.g., hot‑water or low‑pressure steam) for buildings. ⁶
• Manufacturing of heating stoves that are not electric. ²
• Manufacturing of floor furnaces and wall furnaces (excluding warm air furnace systems). ²
• Manufacturing of permanently installed wall and baseboard heating units. ²
• Production lines focused on heating equipment excluding electric space heaters and warm air furnaces. ²
• Establishments whose primary products are heating equipment rather than air‑conditioning or refrigeration. ²

Related NAICS and PSC codes

Boundary notes and exclusions

• Warm air furnaces are out of scope; those are classified under 333415. ²
• Electric space heaters fall under 335211 (Electric Housewares and Household Fan Manufacturing). ²
• Household‑type cooking stoves and ranges are classified in 335221. ²
• Industrial, power, and marine boilers are classified in 332410. ²
• Industrial process furnaces and ovens are in 333994. ²
• Commercial‑type cooking equipment is classified in 333319. ²

Where Census publishes data for this industry

• The Census Bureau began releasing data on the 2022 NAICS basis (including 333414) with 2022 Economic Census products; programs are slated to adopt 2022 NAICS by the end of 2027. ³
• Nonemployer Statistics and other Economic Census tables publish detailed industry statistics by NAICS code, including Manufacturing sectors. ⁷
• Census provides interactive Nonemployer Statistics by industry with NAICS navigation and 2022 documentation. ⁸

Frequently asked questions

• What products are included in NAICS 333414?
  Heating equipment such as building heating boilers, non‑electric heating stoves, floor and wall furnaces, and permanently installed wall/baseboard heating units. Electric space heaters and warm air furnaces are excluded and classified elsewhere. This code focuses on space‑heating equipment that is not electric and not warm‑air furnace‑based. ²

• How does 333414 differ from 333415?
  333414 covers heating equipment other than warm air furnaces and electric heaters; 333415 includes air‑conditioning, warm air heating equipment, and commercial/industrial refrigeration. See also on G2X: NAICS 333415. ²

• Are low‑pressure building heating boilers in 333414?
  Yes. Space‑heating boilers producing low‑pressure steam or hot water for buildings are in 333414. By contrast, power, industrial, and marine boilers are classified under 332410. The cross‑reference in 332410 directs low‑pressure heating boilers to 333414. ⁶

• Are installation services part of this NAICS definition?
  Not specified by official sources ². NAICS classifies establishments by their primary activity; manufacturing codes generally cover production, while installation may be performed by construction or trade contractors. Contracting officers should scope work statements to the principal activity performed.

• What is the current NAICS vintage and when will it be fully adopted?
  The current vintage is 2022. Census began releasing data on a 2022 NAICS basis with 2022 Economic Census products, and most economic programs are expected to adopt by the end of 2027. Agencies should check each program’s schedule for exact cutover timing. ³

Useful resources

• G2X — NAICS 333414 overview
• Census NAICS industry definition for 333414. ²
• Economic Census: NAICS Codes & Understanding Industry Classification Systems. ⁴
• Census implementation timeline for 2022 NAICS. ³
• Product and Service Code (PSC) Manual (official PSC definitions). ⁵

References

1. U.S. Census Bureau, NAICS — Official site. https://www.census.gov/naics/
2. U.S. Census Bureau, 2022 NAICS 333414 — Heating Equipment (except Warm Air Furnaces) Manufacturing. https://www.census.gov/naics/?input=333414&year=2022&details=333414
3. U.S. Census Bureau, Implementation of the 2022 NAICS. https://www.census.gov/library/reference/code-lists/naics/2022/implementation-timeline.html
4. U.S. Census Bureau, Economic Census — NAICS Codes & Understanding Industry Classification Systems. https://www.census.gov/programs-surveys/economic-census/guidance/understanding-naics.html
5. Acquisition.gov, Product and Service Code Manual (landing page). https://www.acquisition.gov/psc-manual
6. U.S. Census Bureau, 2022 NAICS 332410 — Power Boiler and Heat Exchanger Manufacturing. https://www.census.gov/naics/?input=332410&year=2022&details=332410
7. U.S. Census Bureau, Economic Census — Industry tables (2022). https://www.census.gov/programs-surveys/economic-census/data/tables/industry.html
8. U.S. Census Bureau, Nonemployer Statistics by Industry: 2022 (interactive). https://www.census.gov/library/visualizations/interactive/nonemployer-statistics-by-industry-2022.html