NAICS Code 221330 — Steam and Air-Conditioning Supply

National Industry in the official 2022 North American Industry Classification System (U.S. Census Bureau). It is the only national industry under 22133 (Steam and Air-Conditioning Supply).

Code	221330
Title	Steam and Air-Conditioning Supply
Level	National Industry (6-digit)
Edition	NAICS 2022 edition
SBA size standard	$30 million in average annual receipts

Official definition (2022 NAICS)

This industry comprises establishments primarily engaged in providing steam, heated air, or cooled air. The steam distribution may be through mains.

Is a business under 221330 "small"?

Under the SBA size standards (13 CFR 121.201, effective March 17, 2023), a business classified in NAICS 221330 qualifies as a small business if it does not exceed $30 million in average annual receipts. Small-business status determines eligibility for federal set-aside contracts, SAM.gov certifications and SBA loan programs — receipts are averaged over the latest 5 fiscal years.

Where 221330 sits in the hierarchy

Level	Code	Title
Sector	22	Utilities
Subsector	221	Utilities
Industry Group	2213	Water, Sewage and Other Systems
NAICS Industry	22133	Steam and Air-Conditioning Supply
National Industry	221330	Steam and Air-Conditioning Supply

Related SIC codes

Via the official U.S. Census concordance (1987 SIC ↔ NAICS), shown only where the industry definition is unchanged in NAICS 2022.

SIC code	Title
4961	Steam and Air-Conditioning Supply

Data: official 2022 NAICS structure, descriptions and Census concordances, U.S. Census Bureau — U.S. government works in the public domain (17 U.S.C. §105). Suggested reference, not an official determination.