NAICS Code for HVAC Companies (How to Choose the Right HVAC Contractor Code)
HVAC companies are most commonly classified under NAICS 238220 (Plumbing, Heating, and Air-Conditioning Contractors). The right code depends on what the establishment primarily does: HVAC installation and service, refrigeration work, ductwork, controls, or manufacturing/retail activities. If you’re an HVAC business owner, a fast way to choose is to match your main revenue activity at that location (service calls, replacements, new installs, sheet metal/duct fabrication, or product sales).
If you’re trying to classify “HVAC contractor,” “air conditioning repair,” “furnace installation,” or “heating and cooling,” start with NAICS 238220 and confirm the closest fit below.
How to choose the correct NAICS code for an HVAC company
Quick rule: choose the code based on the primary activity at this location: (1) HVAC contracting (install/repair), (2) specialty sheet metal/duct work, (3) equipment sales/retail, or (4) manufacturing.
- Installs, repairs, or replaces HVAC systems at customer sites: usually 238220 – Plumbing, Heating, and Air-Conditioning Contractors.
- Fabricates and installs sheet metal / ductwork as a primary trade: can map to sheet metal work (often not “HVAC contractor” in practice).
- Primarily sells HVAC units/parts to the public (counter sales / showroom): may be a Retail Trade classification rather than construction contracting.
- Builds HVAC equipment (manufactures units/components): usually Manufacturing (Sector 31–33) rather than construction.
⚠️ Common mistake: using an HVAC contractor code for an equipment retailer or manufacturer.
If your location mainly sells products over the counter, it often belongs in Retail Trade. If it builds equipment, it’s usually Manufacturing. Contracting codes typically apply when the main work is performed on customer sites (installation, service, repair, replacement).
Most common NAICS code for HVAC contractors
238220 – Plumbing, Heating, and Air-Conditioning Contractors is the most common classification for HVAC businesses that install, service, or repair heating and cooling systems.
Use this when the establishment’s primary activity is HVAC contracting (residential or commercial), including installs, change-outs, service calls, and maintenance agreements.
HVAC installation vs HVAC service (do you need different codes?)
Most HVAC contractors do both installations and service/repair. In many cases, they still use 238220 because the code covers contracting activity broadly. The key is which activity is primary at the location.
| Primary activity at this location | Often mapped to | Typical indicators |
|---|---|---|
| HVAC installs / replacements | 238220 | Change-outs, new system installs, commissioning, permits, jobsite crews |
| HVAC service & repair | 238220 | Service trucks, maintenance contracts, diagnostic work, parts replacement |
| Refrigeration-focused contracting (commercial) | Often still 238220 | Walk-ins, rack systems, restaurant refrigeration, cold rooms, PM programs |
Best practice: choose one primary code per establishment based on the activity that drives the majority of revenue/value.
Special HVAC situations (what business owners commonly get wrong)
Ductwork & sheet metal focus
If your business primarily fabricates/installs duct systems (sheet metal work) rather than servicing HVAC equipment, you may not be a “typical HVAC contractor” classification.
- Usually HVAC contracting: 238220
- When duct/sheet metal is clearly the main trade: consider whether the primary activity is sheet metal work (separate from general HVAC service work).
Tip: classify based on what your crews do most days (service calls vs duct fabrication/installation).
Controls / building automation
HVAC controls can look like electrical, low-voltage, or automation work. If your firm mainly installs HVAC systems, you’re often still in 238220.
- Controls bundled with HVAC installs: often 238220
- Primarily low-voltage/security/data cabling: can shift into other specialty contracting categories
Rule of thumb: if the “HVAC system” is the core deliverable, keep the HVAC contractor code.
Offices, shops, dispatch centers, and mixed operations
NAICS is assigned at the establishment level. HVAC companies with multiple locations may have different NAICS codes for a dispatch/office location versus a fabrication shop versus a retail showroom.
| Location type | Often classified as | Why |
|---|---|---|
| HVAC contractor shop / dispatch hub | Usually 238220 | Service trucks, technicians, installs, repair operations coordinated from this location |
| Fabrication shop (duct/sheet metal) | May classify separately if fabrication is the primary activity | Production-like workflow differs from typical field service/installation operations |
| Retail showroom / counter sales | Can shift toward Retail Trade if sales dominate | Primary activity is selling to end customers rather than contracting installs |
| Corporate/admin office only | May classify separately depending on structure | Administrative functions can differ from jobsite operations |
NAICS hierarchy for HVAC contractors (reference)
| Category | NAICS | What it covers |
|---|---|---|
| Sector | 23 | Construction |
| Subsector | 238 | Specialty Trade Contractors |
| Common HVAC contracting | 238220 | HVAC installation, service, repair, and related contracting activity |
Common HVAC-adjacent businesses outside HVAC contracting
HVAC equipment manufacturing
If the primary activity is manufacturing HVAC units or commercial refrigeration equipment, classification is typically in Manufacturing (Sector 31–33), such as 333415.
Retail sales & supply houses
If your location primarily sells HVAC equipment/parts (especially to the public), it may fit under Retail Trade rather than construction contracting.
Building maintenance services
If the business primarily provides janitorial/building services (and only minor HVAC coordination), it may fall outside construction contracting. Use the “primary activity at the establishment” test.
HVAC design/engineering only
Firms that only design/specify systems (and do not install/service) can fall outside contractor classifications. This guide page focuses on business-owner “HVAC company” operations rather than pure engineering.
Applied uses of HVAC NAICS codes (why business owners care)
- Licensing, insurance, bonding, and vendor qualification profiles
- Bid eligibility and subcontractor compliance workflows
- Customer targeting (commercial property managers, builders, facilities teams)
- Market sizing and territory planning by metro/county/ZIP
- Data hygiene: keeping your listings, CRMs, and procurement portals consistent
HVAC industry data and business lists
Need an HVAC contractor list by NAICS code?
SICCODE.com provides business lists aligned to HVAC and related construction contractor categories. Lists can be filtered by NAICS, geography (state, county, ZIP), company size, and other firmographic fields, with delivery options including CSV, Excel, and structured formats for integration workflows.
FAQ
- What is the NAICS code for an HVAC company?
HVAC companies are most commonly classified as 238220 – Plumbing, Heating, and Air-Conditioning Contractors, especially when the primary activity is HVAC installation, service, or repair at customer sites. - What NAICS code is used for air conditioning repair?
Air conditioning repair is commonly classified under NAICS 238220 when performed as part of contracting operations (service calls, maintenance, and repairs). - Do HVAC installers and HVAC service companies use different NAICS codes?
Often no. Many businesses use 238220 for both installs and service. Choose based on the establishment’s primary activity (what drives the majority of revenue/value at that location). - What if my HVAC business mainly sells equipment and parts?
If the primary activity at the location is product sales (showroom/counter sales), it may fit under Retail Trade (Sector 44–45) rather than construction contracting. - What if we manufacture HVAC equipment?
Equipment manufacturing is usually classified under Manufacturing (Sector 31–33), such as NAICS 333415, rather than contractor codes.
Next steps
Start with Construction (Sector 23) and confirm whether the establishment is primarily performing HVAC contracting work. For most HVAC contractors, review the code detail page for NAICS 238220. If your location primarily manufactures equipment, review manufacturing classifications such as 333415.
Related resources
- NAICS 238220 Code Detail Page
- NAICS Code Lookup Directory
- What Is a NAICS Code?
- NAICS Included vs. Excluded Activities
- SIC Codes vs NAICS Codes
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