> 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/illinois/ # NAICS 238220 companies in Illinois Companies with NAICS code 238220 (Plumbing, Heating, and Air-Conditioning Contractors) headquartered in Illinois, with their cities, sizes and SIC codes. By Enrich.chat Editorial. Updated October 22, 2026. **Short answer:** The biggest NAICS 238220 companies in Illinois by headcount range include Climate Pros, Hayes Mechanical and A&r Mechanical Contractors. NAICS 238220 is the code for Plumbing, Heating, and Air-Conditioning Contractors. Among those counted, they are mostly very small: 61% have 50 or fewer employees. ## Which NAICS 238220 companies are in Illinois? The biggest by headcount range include Climate Pros, Hayes Mechanical, A&r Mechanical Contractors, Henson Robinson and Premier Mechanical. 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 | | --- | --- | --- | | Climate Pros | Glendale Heights | 1,001 to 5,000 | | Hayes Mechanical | Chicago | 501 to 1,000 | | A&r Mechanical Contractors | Urbana | 201 to 500 | | Henson Robinson | Springfield | 201 to 500 | | Premier Mechanical | Addison | 51 to 200 | | Atomatic Mechanical Services | Arlington Heights | 51 to 200 | | C.J. Erickson Plumbing | Alsip | 51 to 200 | | Air Comfort | Broadview | 51 to 200 | | Ct Mechanical | Addison | 51 to 200 | | Edwards Engineering | Elk Grove Village | 51 to 200 | | Sherman Mechanical | Cary | 51 to 200 | | Emcor Services Team Mechanical | Buffalo Grove | 51 to 200 | | Admiral Heating And Ventilating | Hillside | 51 to 200 | | Rethink Electric | Wood Dale | 51 to 200 | | Trinity Warranty Solutions | Lombard | 51 to 200 | | Solar Sale Usa | Chicago | 51 to 200 | | Murphy & Miller | Chicago | 51 to 200 | | Depue Mechanical | Minooka | 51 to 200 | | Air Design Systems | Willow Springs | 51 to 200 | | Northern Weathermakers Hvac | Northbrook | 51 to 200 | | National Heat & Power | Elk Grove Village | 51 to 200 | | Tci Companies | Goodfield | 51 to 200 | | Jb Contracting | La Salle | 51 to 200 | | Wm. Masters | Bloomington | 51 to 200 | | Popejoy Plumbing, Heating & Electric | Fairbury | 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 Illinois? Within Illinois, Chicago (10%), Addison (4%) and Elk Grove Village (4%) are the most common headquarters. **Figure: Cities of NAICS 238220 companies in Illinois.** Bars for the share of counted NAICS 238220 companies in Illinois headquartered in each city: Chicago 10%, Addison 4%, Elk Grove Village 4%, Lombard 4%, Springfield 4%. *Share of counted NAICS 238220 companies in Illinois by headquarters city.* ## How big are they? 61% of the NAICS 238220 companies counted in Illinois 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 Illinois.** Seven columns for the share of counted NAICS 238220 companies in Illinois in each employee range: 11 to 50 61%, 51 to 200 33%, 201 to 500 3%, 501 to 1,000 1%, 1,001 to 5,000 1%, 5,001 to 10,000 0%, 10,001+ 0%. *Share of counted NAICS 238220 companies in Illinois in each employee range.* ## How do you reach the people at these Illinois 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 Illinois ``` ### 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 Illinois, 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 Illinois](https://enrich.chat/companies-in/illinois/). NAICS 238220 in other states: [California](https://enrich.chat/naics/238220/california/)[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/)[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 Illinois: [NAICS 541511: Custom Computer Programming Services](https://enrich.chat/naics/541511/illinois/)[NAICS 541512: Computer Systems Design Services](https://enrich.chat/naics/541512/illinois/)[NAICS 722511: Full-Service Restaurants](https://enrich.chat/naics/722511/illinois/)[NAICS 531210: Offices of Real Estate Agents](https://enrich.chat/naics/531210/illinois/)[NAICS 524210: Insurance Agencies and Brokerages](https://enrich.chat/naics/524210/illinois/)[NAICS 541613: Marketing Consulting Services](https://enrich.chat/naics/541613/illinois/)[NAICS 621111: Offices of Physicians](https://enrich.chat/naics/621111/illinois/)[NAICS 488510: Freight Transportation Arrangement](https://enrich.chat/naics/488510/illinois/)[NAICS 236220: Commercial and Institutional Building](https://enrich.chat/naics/236220/illinois/)[NAICS 621999: All Other Miscellaneous Ambulatory](https://enrich.chat/naics/621999/illinois/) ## Frequently asked questions ### Which NAICS 238220 companies are in Illinois? The biggest by headcount range include Climate Pros, Hayes Mechanical, A&r Mechanical Contractors, Henson Robinson and Premier Mechanical. 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 Illinois have the most? Chicago (10%), Addison (4%) and Elk Grove Village (4%) lead among the companies counted. ## Try this prompt Find the people at NAICS 238220 companies in Illinois ```text Use www.enrich.chat to find the owners, operations and procurement leaders at companies with NAICS code 238220 in Illinois, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [NAICS 238220 in California](https://enrich.chat/naics/238220/california/) - [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 541511 in Illinois](https://enrich.chat/naics/541511/illinois/) - [NAICS 541512 in Illinois](https://enrich.chat/naics/541512/illinois/) - [NAICS 722511 in Illinois](https://enrich.chat/naics/722511/illinois/) - [NAICS 531210 in Illinois](https://enrich.chat/naics/531210/illinois/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)