423730

Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers

Wholesale Trade › Merchant Wholesalers, Durable Goods › Hardware, and Plumbing and Heating Equipment and Supplies Merchant Wholesalers

SBA Size Standard

500 employees

Employee-Based Verify at SBA.gov →

NAICS Code Hierarchy

42

Sector

Wholesale Trade

423

Subsector

Merchant Wholesalers, Durable Goods

4237

Industry Group

Hardware, and Plumbing and Heating Equipment and Supplies Merchant Wholesalers

423730

National Industry (This Code)

Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers

Official NAICS Description

Source: U.S. Census Bureau 2022 NAICS

📘 Source: U.S. Census Bureau — 2022 NAICS Manual
This industry comprises establishments primarily engaged in the merchant wholesale distribution of warm air heating and air-conditioning equipment and supplies. 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

✓ Small Business Eligibility at a Glance

Based on SBA Table of Small Business Size Standards (2024)

Size Standard

500 employees

Measurement Period

Current count

Standard Type

Employee-Based

Applies To

All contracts under NAICS 423730

Set-Aside Programs

8(a), WOSB, HUBZone, SDVOSB

Certification Required

No (self-certify in SAM.gov)

Size standards are set by the SBA and reviewed periodically. Always verify at SBA.gov before bidding.

Cross-References

The following activities are classified elsewhere in the NAICS system:

Merchant wholesale distribution of household-type gas and electric appliances (except water heaters and heating stoves (i.e., noncooking)) and room air-conditioners--are classified in Industry 423620, Household Appliances, Electric Housewares, and Consumer Electronics Merchant Wholesalers;
Merchant wholesale distribution of hydronic heating equipment--are classified in Industry 423720, Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers;
Merchant wholesale distribution of commercial-type refrigeration equipment--are classified in Industry 423740, Refrigeration Equipment and Supplies Merchant Wholesalers;
Merchant wholesale distribution of refrigerants--are classified in Industry 424690, Other Chemical and Allied Products Merchant Wholesalers; and
Selling and installing warm air heating and air-conditioning equipment--are classified in Industry 238220, Plumbing, Heating, and Air-Conditioning Contractors.

How to Use NAICS 423730 in SAM.gov

NAICS code 423730Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers — is used in SAM.gov to identify businesses whose primary activity falls within this classification. When you add this code to your SAM.gov entity registration, contracting officers searching for vendors in the Hardware, and Plumbing and Heating Equipment and Supplies Merchant Wholesalers space will be able to find your business.

If this code represents your primary business activity, designate it as your primary NAICS code. Your primary NAICS code determines your size standard for any contract solicited under this code. With a size standard of 500 employees, your business must be at or below this threshold to qualify as a small business for set-aside contracts under NAICS 423730.

Log in Entity Registration Goods & Services Add NAICS Code Enter 423730 Save

Frequently Asked Questions

What is NAICS code 423730?

NAICS code 423730 is 'Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers', classified under the Wholesale Trade sector (NAICS 42). This industry comprises establishments primarily engaged in the merchant wholesale distribution of warm air heating and air-conditioning equipment and supplies. Illustrative Examples: Air pollution

What is the SBA small business size standard for NAICS code 423730?

The SBA defines a small business under NAICS code 423730 (Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers) as one with 500 employees. This size standard determines eligibility for small business set-aside contracts, 8(a), HUBZone, WOSB, and SDVOSB programs in SAM.gov.

How do I register NAICS code 423730 in SAM.gov?

To register NAICS code 423730 in SAM.gov: (1) Log in at sam.gov, (2) Navigate to your Entity Registration, (3) Go to the Assertions section, (4) Add 423730 (Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers) to your NAICS code list. You may designate one code as your Primary NAICS code.

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Related NAICS Codes

Other codes in Hardware, and Plumbing and Heating Equipment and Supplies Merchant Wholesalers

Related PSC Codes

PSC codes commonly used with this NAICS sector

Source: GSA PSC Manual April 2025

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