NAICS 238220: Plumbing, Heating, and Air-Conditioning Contractors
This industry comprises establishments primarily engaged in installing and servicing plumbing, heating, and air-conditioning equipment. Contractors in this industry may provide both parts and labor when performing work. The work performed may include new work, additions, alterations, maintenance, and repairs.
This industry comprises establishments primarily engaged in installing and servicing plumbing, heating, and air-conditioning equipment. Contractors in this industry may provide both parts and labor when performing work. The work performed may include new work, additions, alterations, maintenance, and repairs.
Examples of work in this code:
Cooling tower installation
Heating, ventilation, and air-conditioning (HVAC) contractors
Duct work (e.g., cooling, dust collection, exhaust, heating, ventilation) installation
Lawn sprinkler system installation
Fire sprinkler system installation
Mechanical contractors
Fireplace, natural gas, installation
Refrigeration system (e.g., commercial, industrial, scientific) installation
Furnace installation
Sewer hookup and connection, building
Not in this code
Establishments primarily engaged in installing electrical controls for HVAC systems are classified in Industry 238210, Electrical Contractors and Other Wiring Installation Contractors.
Establishments primarily engaged in duct cleaning are classified in Industry 561790, Other Services to Buildings and Dwellings.
Establishments primarily engaged in installing septic tanks and systems are classified in Industry 238910, Site Preparation Contractors.
Establishments primarily engaged in water well drilling (except water intake wells in oil and gas fields) and water well pump and piping system installation are classified in Industry 237110, Water and Sewer Line and Related Structures Construction.
Establishments primarily engaged in repair and maintenance of commercial refrigeration equipment or fire extinguisher and waterless fire suppression systems, without installation are classified in Industry 811310, Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance.
SBA size standard
A business is small under NAICS 238220 if it has no more than $19 million in average annual receipts (averaged over the last five completed fiscal years, including affiliates).
Source: SBA Table of Size Standards, effective 2023-03-17. Always check the size standard printed in the solicitation itself.
Who buys it
Departments that posted the most NAICS 238220 solicitations in the last two years:
AOML HVAC and BAS Controls Upgrade Project · Commerce · Florida · posted September 28, 2026
657-27-107JC, Replace Select Hot Water Heating System · Veterans Affairs · Missouri · posted September 28, 2026
J045--Install Chill Water System Filtration & Steam Condensate Polisher · Veterans Affairs · Texas · posted September 25, 2026
Buckley SFB - BDOC Chiller Replacement · Department of Defense · Colorado · posted September 25, 2026
Fire Suppression Survey at the Cleveland VA Medical Center · Veterans Affairs · Ohio · posted September 25, 2026
Do this kind of work?
Send XL Eagle your price on an open plumbing, heating, and air-conditioning contractors job. We write and submit the bid under our registrations. If we win, you do the work at your price. No fees.
NAICS 238220 is Plumbing, Heating, and Air-Conditioning Contractors. This industry comprises establishments primarily engaged in installing and servicing plumbing, heating, and air-conditioning equipment. Contractors in this industry may provide both parts and labor when performing work. The work performed may include new work, additions, alterations, maintenance, and repairs.
What is the SBA size standard for NAICS 238220?
The size standard for NAICS 238220 is $19 million in average annual receipts. Firms at or under it count as small businesses for contracts assigned this code.
Are there government contracts for plumbing, heating, and air-conditioning contractors?
Yes. 7 government contracts are open under NAICS 238220 right now, and 615 were posted in the last 12 months.
Can I bid on NAICS 238220 contracts without registering in SAM.gov?
You need an active SAM.gov registration to win a federal contract in your own name. If you would rather skip that, XL Eagle can bid as the prime contractor using your price, and you do the work as our subcontractor.
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