NAICS Code 423730: Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers
National industry
SBA small business size standard: 175 employees
Definition
This industry comprises establishments primarily engaged in the merchant wholesale distribution of warm air heating and air-conditioning equipment and supplies.
Government contracts for this product: PSC 5915 Filters and Networks
Code facts
- Part of
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42
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423
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4237
- 42373
-
4237
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423
-
42
- Contract awards
- 19 In the last 12 months
- Contract obligations
- $1,644,860 In FY2025
NAICS codes and definitions come from the U.S. Census Bureau, size standards from the SBA and contract spending from SAM.gov/FPDS.
Business activities under NAICS 423730
- Air pollution control equipment and supplies merchant wholesalers
- Air-conditioning equipment (except room units) merchant wholesalers
- Automotive air-conditioners merchant wholesalers
- Baseboard heaters, electric, non-portable, merchant wholesalers
- Central heating equipment, warm-air, merchant wholesalers
- Compressors, air-conditioning, merchant wholesalers
- Condensing units, air-conditioning, merchant wholesalers
- Dust collection equipment merchant wholesalers
- Furnaces, warm air (i.e., forced air), merchant wholesalers
- Heat pumps merchant wholesalers
- Heating equipment, warm air (i.e. forced air), merchant wholesalers
- Humidifiers and dehumidifiers (except portable) merchant wholesalers
- Pollution control equipment, air, merchant wholesalers
- Ventilating equipment and supplies (except household-type fans) merchant wholesalers
- Warm air heating equipment merchant wholesalers
Looking for another activity? Search the NAICS code lookup or browse business activities from A to Z.
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $19,407 |
| FY2026 | $1,028,558 |
| FY2025 | $1,644,860 |
| FY2024 | $2,089,287 |
| FY2023 | $941,342 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | AUI Korea | $356,668 | |
| 2 | Windward Enterprises, LLC | $204,095 | |
| 3 | Hurst, Inc. | $92,879 | |
| 4 | Baker Distributing Company LLC | $55,819 | |
| 5 | DVL Group, Inc. | $46,168 | |
| 6 | Burhani Enterprises Inc. | $36,222 | |
| 7 | Alpha Mechanical Service LLC | $34,980 | |
| 8 | Rich's Refrigeration, Air Conditioning, Heating, Plumbing And Welding Service, Inc. | $33,635 | |
| 9 | Industrial Supply Solutions Inc. | $25,341 | |
| 10 | Koch Air LLC | $24,536 |
See the full FY2025 ranking of NAICS 423730 contractors, by parent company.
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of the Army | $356,668 | |
| 2 | Department of Justice | $242,082 | |
| 3 | Defense Logistics Agency | $208,095 | |
| 4 | Department of Homeland Security | $108,735 | |
| 5 | Department of State | $93,109 | |
| 6 | General Services Administration | $36,222 | |
| 7 | Department of the Navy | $3,165 |
Top PSC codes by obligations
| Rank | PSC code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | 5915 Filters and Networks | $356,668 | |
| 2 | 4520 Space and Water Heating Equipment | $204,095 | |
| 3 | 4120 Air Conditioning Equipment | $134,235 | |
| 4 | Z2JZ Repair or Alteration of Miscellaneous Buildings | $84,940 | |
| 5 | 4110 Refrigeration Equipment | $55,819 | |
| 6 | 6150 Miscellaneous Electric Power and Distribution Equipment | $46,168 | |
| 7 | Z1FA Maintenance of Family Housing Facilities | $40,711 | |
| 8 | Z1NB Maintenance of Heating and Cooling Plants | $34,980 | |
| 9 | 4510 Plumbing Fixtures and Accessories | $24,536 | |
| 10 | 4410 Industrial Boilers | $19,407 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | South Carolina | $184,595 | |
| 2 | Michigan | $92,879 | |
| 3 | Virginia | $59,819 | |
| 4 | Pennsylvania | $46,168 | |
| 5 | Illinois | $36,222 | |
| 6 | Kentucky | $34,980 | |
| 7 | West Virginia | $33,635 | |
| 8 | North Carolina | $25,341 | |
| 9 | Indiana | $24,536 | |
| 10 | Mississippi | $19,407 | |
| 11 | Florida | $18,720 | |
| 12 | Maryland | $15,856 | |
| 13 | New York | $14,253 | |
| 14 | Ohio | $2,195 |
Show all 14
Shares are of everything obligated under NAICS 423730 in the last 12 months before deobligations, including work performed abroad or with no place of performance on record.
Contract opportunities
Show 40 more
Latest 50 of 523 listed here. See the rest on GovTribe.
Size standard history
Federal Register rules that named this code
From the NAICS codes each rule's amendments to 13 CFR 121.201 name. Rules that print their size standard tables as images aren't listed.
Quick answers
What is NAICS 423730?
NAICS 423730 is Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers, a national industry in NAICS 42, Wholesale Trade.
What is the NAICS code for heat pumps merchant wholesalers?
The NAICS code for heat pumps merchant wholesalers is 423730, Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers.
What is the NAICS code for dust collection equipment merchant wholesalers?
The NAICS code for dust collection equipment merchant wholesalers is 423730, Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers.
What is the NAICS code for warm air heating equipment merchant wholesalers?
The NAICS code for warm air heating equipment merchant wholesalers is 423730, Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers.
When did the size standard for NAICS 423730 last change?
The most recent Federal Register rule on record that names NAICS 423730 in the SBA's size standards is "Small Business Size Standards: Wholesale Trade and Retail Trade" (87 FR 35869), published Jun 14, 2022 and effective Jul 14, 2022.
How much do federal agencies spend under NAICS 423730?
Federal contracts under NAICS 423730 obligated $1,644,860 in fiscal year 2025 and $5,723,456 in fiscal years 2023 through 2027.
Who are the largest contractors under NAICS 423730?
The contractors with the most obligated under NAICS 423730 in fiscal years 2026 and 2027 are AUI Korea ($356,668); Windward Enterprises, LLC ($204,095); and Hurst, Inc. ($92,879).
Which agencies buy the most under NAICS 423730?
The agencies that obligated the most under NAICS 423730 in fiscal years 2026 and 2027 are Department of the Army ($356,668), Department of Justice ($242,082) and Defense Logistics Agency ($208,095).
Which PSC codes are used with NAICS 423730?
The PSC codes with the most obligated under NAICS 423730 in fiscal years 2026 and 2027 are 5915 Filters and Networks, 4520 Space and Water Heating Equipment and 4120 Air Conditioning Equipment.
Where is the work under NAICS 423730 performed?
By place of performance, the states with the most contract obligations under NAICS 423730 over the last 12 months are South Carolina ($184,595), Michigan ($92,879) and Virginia ($59,819).
What is the latest contract opportunity under NAICS 423730?
The latest contract opportunity under NAICS 423730 is J041--replacement chiller unit, solicitation from Veterans Integrated Service Network 15 (VHA), posted August 6, 2026.
On GovTribe
See everything under NAICS 423730
- Federal contract opportunities, awards and IDVs under this code
- Funding analysis by contractor, agency and set-aside
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