> Enrich.chat gives AI agents verified work emails and mobiles. To use it from an agent, read https://enrich.chat/agents.md . This is the Markdown version of https://enrich.chat/naics/238220/california/ # NAICS 238220 companies in California Companies with NAICS code 238220 (Plumbing, Heating, and Air-Conditioning Contractors) headquartered in California, with their cities, sizes and SIC codes. By Enrich.chat Editorial. Updated October 22, 2026. **Short answer:** The biggest NAICS 238220 companies in California by headcount range include Southland Industries, Acco Engineered Systems and Murray. NAICS 238220 is the code for Plumbing, Heating, and Air-Conditioning Contractors. Among those counted, they are mostly very small: 70% have 50 or fewer employees. ## Which NAICS 238220 companies are in California? The biggest by headcount range include Southland Industries, Acco Engineered Systems, Murray, Control Air Enterprises and The Arcticom Group. NAICS 238220 is the code for Plumbing, Heating, and Air-Conditioning Contractors. Names link to a company profile where we have one. | Company | City | Employees | | --- | --- | --- | | Southland Industries | Garden Grove | 5,001 to 10,000 | | Acco Engineered Systems | Pasadena | 5,001 to 10,000 | | Murray | Rancho Dominguez | 1,001 to 5,000 | | Control Air Enterprises | Anaheim | 1,001 to 5,000 | | The Arcticom Group | Walnut Creek | 1,001 to 5,000 | | Pan-Pacific Mechanical | Fountain Valley | 501 to 1,000 | | Semper Solaris | El Cajon | 501 to 1,000 | | Cosco Fire Protection | San Juan Capistrano | 501 to 1,000 | | A.O. Reed & Co | San Diego | 501 to 1,000 | | Ldi Mechanical | Corona | 501 to 1,000 | | Ecoplexus | San Francisco | 201 to 500 | | Air Systems | San Jose | 201 to 500 | | Air Control Systems | Ontario | 201 to 500 | | Jackson & Blanc | San Diego | 201 to 500 | | Broadway Mechanical-Contractors | Oakland | 201 to 500 | | Brian Cox Mechanical | Poway | 201 to 500 | | Hps Mechanical | Bakersfield | 201 to 500 | | Diversified Thermal Services | Anaheim | 201 to 500 | | Syserco | Fremont | 51 to 200 | | Rich Solar | Norco | 51 to 200 | | Solarever Usa | Lake Forest | 51 to 200 | | Kr Wolfe | Lakeside | 51 to 200 | | Bay City Mechanical | Richmond | 51 to 200 | | Airco Mechanical | Sacramento | 51 to 200 | | Atlas Mechanical | San Diego | 51 to 200 | The table shows the 25 biggest by headcount range, with ties broken by audience size. The charts and percentages below cover every company counted for this page, not just these 25, and companies with fewer than 11 employees are not counted. Headquarters is the location on each company's public profile. ## Which cities in California? Within California, Anaheim (4%), Los Angeles (4%) and San Diego (4%) are the most common headquarters. **Figure: Cities of NAICS 238220 companies in California.** Bars for the share of counted NAICS 238220 companies in California headquartered in each city: Anaheim 4%, Los Angeles 4%, San Diego 4%, San Jose 4%, El Cajon 3%, Fresno 2%, Rancho Cucamonga 2%. *Share of counted NAICS 238220 companies in California by headquarters city.* ## How big are they? 70% of the NAICS 238220 companies counted in California have 50 or fewer employees, and the middle one is in the 11 to 50 range. Companies with fewer than 11 employees are not counted. **Figure: Size of NAICS 238220 companies in California.** Seven columns for the share of counted NAICS 238220 companies in California in each employee range: 11 to 50 70%, 51 to 200 24%, 201 to 500 3%, 501 to 1,000 2%, 1,001 to 5,000 1%, 5,001 to 10,000 1%, 10,001+ 0%. *Share of counted NAICS 238220 companies in California in each employee range.* ## How old are they? Most were founded in the 2000s (26%), then the 2010s (25%). **Figure: When NAICS 238220 companies in California were founded.** Eight columns for the share of counted NAICS 238220 companies in California founded in each era: Before 1960 8%, 1960s 3%, 1970s 6%, 1980s 12%, 1990s 19%, 2000s 26%, 2010s 25%, 2020s 0%. *Share of counted NAICS 238220 companies in California by the era they were founded in, for the ones that list a founding year.* ## How do you reach the people at these California companies? The people to talk to are usually owners, operations and procurement leaders. Build the list in three prompts to your AI agent. ### 1. Count them (free) Counting who matches never uses credits. ```text Use www.enrich.chat to count the companies with NAICS code 238220 in California ``` ### 2. Find the people (5 credits per person) Name the roles you sell to. Each person returned is 5 credits, and name, title and company are included. ```text Use www.enrich.chat to find the owners, operations and procurement leaders at companies with NAICS code 238220 in California, with their titles ``` ### 3. Get their work emails (10 credits each) An email is 10 credits only when one is found. Every email comes with a status: verified, catch-all or unknown. ```text Use www.enrich.chat to find the work emails for these people and tell me which ones are verified ``` ## More to explore About the code: [NAICS 238220: Plumbing, Heating, and Air-Conditioning Contractors](https://enrich.chat/naics/238220/). About the place: [companies in California](https://enrich.chat/companies-in/california/). NAICS 238220 in other states: [Texas](https://enrich.chat/naics/238220/texas/)[Florida](https://enrich.chat/naics/238220/florida/)[Ohio](https://enrich.chat/naics/238220/ohio/)[North Carolina](https://enrich.chat/naics/238220/north-carolina/)[Georgia](https://enrich.chat/naics/238220/georgia/)[Pennsylvania](https://enrich.chat/naics/238220/pennsylvania/)[Illinois](https://enrich.chat/naics/238220/illinois/)[Arizona](https://enrich.chat/naics/238220/arizona/)[Virginia](https://enrich.chat/naics/238220/virginia/)[Tennessee](https://enrich.chat/naics/238220/tennessee/) Other NAICS codes in California: [NAICS 541511: Custom Computer Programming Services](https://enrich.chat/naics/541511/california/)[NAICS 541512: Computer Systems Design Services](https://enrich.chat/naics/541512/california/)[NAICS 722511: Full-Service Restaurants](https://enrich.chat/naics/722511/california/)[NAICS 541613: Marketing Consulting Services](https://enrich.chat/naics/541613/california/)[NAICS 513210: Software Publishers](https://enrich.chat/naics/513210/california/)[NAICS 531210: Offices of Real Estate Agents](https://enrich.chat/naics/531210/california/)[NAICS 524210: Insurance Agencies and Brokerages](https://enrich.chat/naics/524210/california/)[NAICS 236220: Commercial and Institutional Building](https://enrich.chat/naics/236220/california/)[NAICS 621111: Offices of Physicians](https://enrich.chat/naics/621111/california/)[NAICS 541110: Offices of Lawyers](https://enrich.chat/naics/541110/california/) ## Frequently asked questions ### Which NAICS 238220 companies are in California? The biggest by headcount range include Southland Industries, Acco Engineered Systems, Murray, Control Air Enterprises and The Arcticom Group. The page lists 25 with links to their profiles where we have them. ### What is NAICS 238220? NAICS 238220 is the code for Plumbing, Heating, and Air-Conditioning Contractors, in sector 23: Construction. ### Which cities in California have the most? Anaheim (4%), Los Angeles (4%) and San Diego (4%) lead among the companies counted. ## Try this prompt Find the people at NAICS 238220 companies in California ```text Use www.enrich.chat to find the owners, operations and procurement leaders at companies with NAICS code 238220 in California, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [NAICS 238220 in Texas](https://enrich.chat/naics/238220/texas/) - [NAICS 238220 in Florida](https://enrich.chat/naics/238220/florida/) - [NAICS 238220 in Ohio](https://enrich.chat/naics/238220/ohio/) - [NAICS 238220 in North Carolina](https://enrich.chat/naics/238220/north-carolina/) - [NAICS 541511 in California](https://enrich.chat/naics/541511/california/) - [NAICS 541512 in California](https://enrich.chat/naics/541512/california/) - [NAICS 722511 in California](https://enrich.chat/naics/722511/california/) - [NAICS 541613 in California](https://enrich.chat/naics/541613/california/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)