On the Record · Comfort Systems USA
Comfort Systems USA subsidiaries, as it lists them
The subsidiaries Comfort Systems USA lists in its latest annual report, with the jurisdiction of each, linked to the filing.
Subsidiaries it lists
| Subsidiary | Jurisdiction |
|---|---|
| ACI Mechanical, Inc. | Delaware |
| Air Systems Engineering, Inc. | Washington |
| AirTemp, Inc. | Maine |
| Altrax Tool and Equipment Co LLC | Tennessee |
| Amteck Holdco LLC | Delaware |
| Amteck Sprinkler LLC | Delaware |
| Amteck, LLC | Kentucky |
| Armani East LLC | New York |
| Associated Boiler Systems, Inc. | Indiana |
| Atlantic Electric, LLC | South Carolina |
| BCH Holdings, Inc. | Florida |
| BCH Leasing, LLC | Florida |
| BCH Mechanical, L.L.C. | Florida |
| BCM Controls Corporation | Massachusetts |
| Billone West LLC | New York |
| Brick & Mortar Ventures II, L.P. | Delaware |
| Brick & Mortar Ventures III, L.P. | Delaware |
| Bright’s Systems Incorporated | New York |
| Century Contractors, LLC | North Carolina |
| ColonialWebb Contractors Company | Virginia |
| Comfort Systems USA (Arkansas), Inc. | Arkansas |
| Comfort Systems USA (Central Texas), Inc. | Texas |
| Comfort Systems USA (Intermountain), Inc. | Utah |
| Comfort Systems USA (Kentucky), Inc. | Kentucky |
| Comfort Systems USA (Mid South), Inc. | Alabama |
| Comfort Systems USA (MidAtlantic), LLC | Virginia |
| Comfort Systems USA (Northwest), Inc. | Washington |
| Comfort Systems USA (Ohio), Inc. | Ohio |
| Comfort Systems USA (South Central), Inc. | Texas |
| Comfort Systems USA (Southeast), Inc. | Delaware |
| Comfort Systems USA (Southwest), Inc. | Arizona |
| Comfort Systems USA (Syracuse), Inc. | New York |
| Comfort Systems USA (Texas), L.P. | Texas |
| Comfort Systems USA G.P., Inc. | Delaware |
| Comfort Systems USA Shoffner, Inc. | Tennessee |
| Comfort Systems USA Strategic Accounts, LLC | Indiana |
| ConServ Building Services of Alabama, LLC | Alabama |
| ConServ Building Services of Georgia, LLC | Georgia |
| ConServ Building Services of North Carolina, LLC | North Carolina |
| ConServ Building Services of Tennessee, LLC | Tennessee |
| ConServ Building Services, LLC | Florida |
| Control Concepts Mechanical Services, LLC | Georgia |
| Control Concepts, LLC | Georgia |
| DECCO, Inc. | Massachusetts |
| Design Mechanical Incorporated | Colorado |
| Dilling Group, Inc. | Indiana |
| Dilling, LLC | Indiana |
| Dyna Ten Corporation | Texas |
| Dilling Group, Inc. | Indiana |
| E Solutions LLC | Indiana |
| Eastern Heating & Cooling, Inc. | New York |
| Edwards Electrical & Mechanical, Inc. | Indiana |
| Eldeco, Inc. | South Carolina |
| Environmental Air Systems, LLC | North Carolina |
| Envirotrol, LLC | North Carolina |
| Feyen-Zylstra, LLC | Michigan |
| Feyen-Zylstra Holdings, LLC | Michigan |
| F. W. Dilling, LLC | Indiana |
| Granite State Plumbing & Heating, LLC | New Hampshire |
| Hayes & Lunsford Electric, LLC | South Carolina |
| Hess Mechanical, LLC | Maryland |
| HVACRedu.net LLC | Idaho |
| Ivey Mechanical Company, LLC | Mississippi |
| J & S Mechanical Contractors, Inc. | Utah |
| Kodiak Labor Solutions, LLC | Delaware |
| Meisner Electric, Inc. | Florida |
| MEP Holding Co., Inc. | Indiana |
| MJ Mechanical Services, Inc. | Virginia |
| N471VY Trust | Utah |
| North American Mechanical, Inc. | Delaware |
| OFF, LLC | Indiana |
| Post Oak Insurance Co. Ltd. | Cayman Islands |
| Precision Plumbing and Service, LLC | Delaware |
| Premier Prefabrication Solutions, LLC | Texas |
| Quality Air Heating & Cooling, Inc. | Michigan |
| Riddleberger Brothers, Inc. | Virginia |
| Right Way Plumbing & Mechanical LLC | Florida |
| Royalaire Holdings, LLC | Florida |
| Royalaire Mechanical Services, LLC | Florida |
| S.I. Goldman Company, Inc. | Florida |
| S.M. Lawrence Company, Inc. | Tennessee |
| Seasonair, LLC | Maryland |
| Smith Farm Properties, LLC | North Carolina |
| Starr Electric Company, Incorporated | North Carolina |
| Summit Industrial Construction, LLC | Delaware |
| TAS Energy Inc. | Delaware |
| TAS Modular Data Limited | Ireland |
| Temp Right Service, Inc. | Delaware |
| Tennessee Electric Company, Inc. | Tennessee |
| TES Controls, LLC | Kentucky |
| Thermal Service, LLC | Kentucky |
| Trinity Contractors, LLC | Alabama |
| Trumbo Electric, Incorporated | Virginia |
| Walker Electrical Contractors, LLC | Texas |
| Walker Engineering, Inc. | Texas |
| Walker Industrial, LLC | Texas |
| Western States Mechanical, Inc. | Utah |
From Exhibit 21 of the 10-K for 2025. Companies must list their significant subsidiaries there and may leave out smaller ones, so this is the company’s own list, not every entity it owns.
Read from Comfort Systems USA’s annual reports (10-K for 2025, 10-K for 2024, 10-K for 2023) and the financial data it files with the SEC, as of 2026-02-19. Every quotation is word for word from the filing linked beside it; how these pages are built and checked. The full record is in its company data sheet.