> 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/pennsylvania/ # NAICS 238220 companies in Pennsylvania Companies with NAICS code 238220 (Plumbing, Heating, and Air-Conditioning Contractors) headquartered in Pennsylvania, with their cities, sizes and SIC codes. By Enrich.chat Editorial. Updated October 22, 2026. **Short answer:** The biggest NAICS 238220 companies in Pennsylvania by headcount range include Limbach, Jj White and Mcclure. NAICS 238220 is the code for Plumbing, Heating, and Air-Conditioning Contractors. Among those counted, they are mostly very small: 72% have 50 or fewer employees. ## Which NAICS 238220 companies are in Pennsylvania? The biggest by headcount range include Limbach, Jj White, Mcclure, Mckamish and Ssm Industries. 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 | | --- | --- | --- | | Limbach | Warrendale | 1,001 to 5,000 | | Jj White | Philadelphia | 1,001 to 5,000 | | Mcclure | Harrisburg | 201 to 500 | | Mckamish | Pittsburgh | 201 to 500 | | Ssm Industries | Pittsburgh | 201 to 500 | | Tudi Mechanical Systems | McKees Rocks | 51 to 200 | | Gsm Industrial | Lancaster | 51 to 200 | | Myco Mechanical | Telford | 51 to 200 | | Hampton Mechanical | Gibsonia | 51 to 200 | | James Craft & Son | York Haven | 51 to 200 | | Air King America | West Chester | 51 to 200 | | Devine Brothers | King Of Prussia | 51 to 200 | | Dwd Mechanical Contractor | Morton | 51 to 200 | | Axcess Industries | Fleetwood | 51 to 200 | | Alpine Mechanical Services | Sellersville | 51 to 200 | | Tracey Mechanical | Newtown Square | 51 to 200 | | Kinetix | Broomall | 51 to 200 | | Wm J Donovan | Philadelphia | 51 to 200 | | Goodco Mechanical | State College | 51 to 200 | | Carter Mechanical | Malvern | 51 to 200 | | D&g Mechanical | West Middlesex | 51 to 200 | | Us Solar Development | Lancaster | 11 to 50 | | Bright Eye Solar | Lancaster | 11 to 50 | | Goshen Mechanical Contractors | West Chester | 11 to 50 | | Comfort Pro | Reading | 11 to 50 | 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 Pennsylvania? Within Pennsylvania, Pittsburgh (8%), Lancaster (7%) and Philadelphia (7%) are the most common headquarters. **Figure: Cities of NAICS 238220 companies in Pennsylvania.** Bars for the share of counted NAICS 238220 companies in Pennsylvania headquartered in each city: Pittsburgh 8%, Lancaster 7%, Philadelphia 7%, West Chester 4%. *Share of counted NAICS 238220 companies in Pennsylvania by headquarters city.* ## How big are they? 72% of the NAICS 238220 companies counted in Pennsylvania 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 Pennsylvania.** Seven columns for the share of counted NAICS 238220 companies in Pennsylvania in each employee range: 11 to 50 72%, 51 to 200 22%, 201 to 500 4%, 501 to 1,000 0%, 1,001 to 5,000 3%, 5,001 to 10,000 0%, 10,001+ 0%. *Share of counted NAICS 238220 companies in Pennsylvania in each employee range.* ## How do you reach the people at these Pennsylvania 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 Pennsylvania ``` ### 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 Pennsylvania, 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 Pennsylvania](https://enrich.chat/companies-in/pennsylvania/). 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/)[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 Pennsylvania: [NAICS 541511: Custom Computer Programming Services](https://enrich.chat/naics/541511/pennsylvania/)[NAICS 541512: Computer Systems Design Services](https://enrich.chat/naics/541512/pennsylvania/)[NAICS 524210: Insurance Agencies and Brokerages](https://enrich.chat/naics/524210/pennsylvania/)[NAICS 541110: Offices of Lawyers](https://enrich.chat/naics/541110/pennsylvania/)[NAICS 611110: Elementary and Secondary Schools](https://enrich.chat/naics/611110/pennsylvania/)[NAICS 236220: Commercial and Institutional Building](https://enrich.chat/naics/236220/pennsylvania/)[NAICS 531210: Offices of Real Estate Agents](https://enrich.chat/naics/531210/pennsylvania/)[NAICS 541613: Marketing Consulting Services](https://enrich.chat/naics/541613/pennsylvania/)[NAICS 621111: Offices of Physicians](https://enrich.chat/naics/621111/pennsylvania/)[NAICS 523940: Portfolio Management and Investment](https://enrich.chat/naics/523940/pennsylvania/) ## Frequently asked questions ### Which NAICS 238220 companies are in Pennsylvania? The biggest by headcount range include Limbach, Jj White, Mcclure, Mckamish and Ssm Industries. 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 Pennsylvania have the most? Pittsburgh (8%), Lancaster (7%) and Philadelphia (7%) lead among the companies counted. ## Try this prompt Find the people at NAICS 238220 companies in Pennsylvania ```text Use www.enrich.chat to find the owners, operations and procurement leaders at companies with NAICS code 238220 in Pennsylvania, 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 Pennsylvania](https://enrich.chat/naics/541511/pennsylvania/) - [NAICS 541512 in Pennsylvania](https://enrich.chat/naics/541512/pennsylvania/) - [NAICS 524210 in Pennsylvania](https://enrich.chat/naics/524210/pennsylvania/) - [NAICS 541110 in Pennsylvania](https://enrich.chat/naics/541110/pennsylvania/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)