2022 NAICS national industry in sector 22 Utilities
221330 Steam and Air-Conditioning Supply
NAICS 221330 is the US industry code for steam and air-conditioning supply. It covers establishments primarily engaged in providing steam, heated air, or cooled air.
- Code
- 221330 (2022 NAICS)
- Title
- Steam and Air-Conditioning Supply
- Part of
- Water, Sewage and Other Systems
- SBA small business limit
- Average annual receipts up to $30 million
- Closest UK SIC
- 35300 (details)
Changes coming. The NAICS 2027 revision applies to data from 1 January 2027, and SBA proposed new size standards on 20 August 2026. The values on this page are the ones in force today; we update this page when the official files change.
Official definition
This industry comprises establishments primarily engaged in providing steam, heated air, or cooled air. The steam distribution may be through mains.
When to use a different code
Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:
- Selling and installing warm air heating and air-conditioning equipment are classified in Industry 238220, Plumbing, Heating, and Air-Conditioning Contractors.
- Merchant wholesale distribution of warm air heating and air-conditioning equipment are classified in Industry 423730, Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers.
Activities listed under 221330
The Census index assigns these 13 activities to this code. If your business matches one, this is your code.
- Air-conditioning supply
- Cooled air distribution
- Distribution of cooled air
- Distribution of heated air
- Distribution of steam heat
- Geothermal steam production
- Heat, steam, distribution
- Heated air distribution
- Heating steam (suppliers of heat) providers
- Steam heat distribution
- Steam heating systems (i.e., suppliers of heat)
- Steam production and distribution
- Steam supply systems, including geothermal
SBA size standard for 221330
To count as a small business for SBA loans and federal contracts under NAICS 221330, your business (including affiliates) must not exceed $30 million in average annual receipts. Check your business.
Source: SBA table of size standards, effective March 17, 2023.
Closest UK SIC 2007 codes
There is no official one-to-one link between NAICS and UK SIC. These codes share the same international class (ISIC Rev. 4: 3530), so treat them as a starting point and check the definition.
Built from Census concordances 2022→2017 NAICS and 2017 NAICS→ISIC Rev. 4.
Similar codes to compare
Data last changed November 14, 2026. How this page is built.