221330 — Steam and Air-Conditioning Supply
Description
This industry comprises establishments primarily engaged in providing steam, heated air, or cooled air. The steam distribution may be through mains.
Overview Facts
| NAICS Code | 221330 |
|---|---|
| Industry Title | Steam and Air-Conditioning Supply |
| SBA Size Standard | $30,000,000 |
| U.S. Establishments | 118 (Census CBP, 2023) |
| IRS PBA Code | 221300 (rolled-up match) |
| Sectors Hierarchy | Sector 22 → 221 → 2213 |
| Source / Verified | US Census 2022 NAICS Manual, Census CBP / 2026-06-28 |
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 4961 - Steam and Air-Conditioning Supply (via SIC1987:4961→NAICS1997:22133→2002:221330→2007:221330→2012:221330→2017:221330→2022:221330)
Suggested Product Service Codes (Advisory)
The following Product Service Codes (PSCs) are advisory suggestions aligned with this NAICS code. Note: NAICS and PSC codes map to different dimensions of procurement (industry vs. product/service). There is no official binding 1:1 crosswalk.
- PSC 4420 — Heat Exchangers and Steam Condensers
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Related Resources & Compliance Guides
Further regulatory reference links for NAICS code 221330:
- Sector 22 Directory Hub — List of related industries in the Utilities sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- SBA Size Standards Guide — Complete rules and averaging periods for small business classifications.
- Calculating Annual Receipts Guide — Detailed worked example of revenue calculation rules.
- IRS Principal Business Activity Guide — How NAICS codes map to corporate and entity tax filings.
Related Industries in 2213
Frequently Asked Questions (FAQ)
Is 221330 a valid 2022 NAICS code?
NAICS 221330 is 'Steam and Air-Conditioning Supply', a 2022 U.S. national industry under Sector 22 (Utilities); the SBA small-business size standard is $30,000,000.
What is the SBA size standard for NAICS 221330?
The SBA small business size standard for NAICS 221330 is $30,000,000 (based on receipts).
What is the legacy SIC code mapping for 221330?
NAICS code 221330 maps to the legacy 1987 SIC codes: 4961 - Steam and Air-Conditioning Supply.