423730 — Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers
Description
This industry comprises establishments primarily engaged in the merchant wholesale distribution of warm air heating and air-conditioning equipment and supplies (as defined in the official U.S. Census Bureau 2022 NAICS Manual).
Illustrative Examples
- Air pollution control equipment and supplies merchant wholesalers
- Nonportable electric baseboard heaters merchant wholesalers
- Air-conditioning equipment (except room units) merchant wholesalers
- Warm air central heating equipment merchant wholesalers
- Automotive air-conditioners merchant wholesalers
- Ductless heating and air-conditioning system equipment merchant wholesalers
Overview Facts
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 5075 - Warm Air Heating and Air-Conditioning Equipment and Supplies (via SIC1987:5075→NAICS1997:42173→2002:423730→2007:423730→2012:423730→2017:423730→2022:423730)
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 L045 — Technical Representation Services: Plumbing, Heating, and Waste Disposal Equipment
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Frequently Asked Questions (FAQ)
Is NAICS code 423730 valid in 2022? ▾
Yes, 423730 is a valid 6-digit 2022 NAICS national industry code representing 'Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers' under Sector 42 in the official classification index.
What is the SBA size standard for NAICS code 423730? ▾
The Small Business Administration (SBA) has established a small business size standard of 175 employees for NAICS code 423730 (Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers), calculated based on employees.
What is the legacy SIC equivalent for NAICS 423730? ▾
According to official Census Bureau concordance tables, NAICS code 423730 (Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 5075 - Warm Air Heating and Air-Conditioning Equipment and Supplies.
Related Pages & Tools
Further regulatory reference links for NAICS code 423730:
- Sector 42 Directory Hub — List of related industries in the Wholesale Trade sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- NAICS 423730 to SIC Crosswalk — Bidirectional mapping to legacy SIC codes (Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers).
- 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.