EXHIBIT 21.1
SUBSIDIARIES OF COMFORT SYSTEMS USA, INC.
as of December 31, 2018
ENTITY NAME |
| DOMESTIC |
| FORMATION |
|
Accu-Temp GP, Inc. |
| Delaware |
| 05/21/1998 |
|
Accu-Temp LP, Inc. |
| Delaware |
| 05/20/1998 |
|
ACI Mechanical, Inc. |
| Delaware |
| 06/26/1998 |
|
Acorn Industrial, LLC |
| North Carolina |
| 01/03/1997 |
|
Advance Technology, Inc. |
| Maine |
| 08/09/1994 |
|
Air Systems Engineering, Inc. |
| Washington |
| 05/18/1973 |
|
AirTemp, Inc. |
| Maine |
| 10/15/1998 |
|
ARC Comfort Systems USA, Inc. |
| Delaware |
| 03/17/1998 |
|
Armani East LLC |
| New York |
| 12/03/2018 |
|
Arstectum, Inc. |
| New Hampshire |
| 02/17/2005 |
|
BCH Holdings, Inc. |
| Florida |
| 12/28/2004 |
|
BCH Leasing, LLC |
| Florida |
| 10/25/1990 |
|
BCH Mechanical, L.L.C. |
| Florida |
| 10/19/1976 |
|
BCM Controls Corporation |
| Massachusetts |
| 10/03/1984 |
|
Billone West LLC |
| New York |
| 12/03/2018 |
|
Blue C, LLC dba HVACRedu.net |
| Montana |
| 01/01/2007 |
|
Building Temperature Solutions, LLC |
| Indiana |
| 10/27/2009 |
|
California Comfort Systems USA, Inc. |
| California |
| 05/18/1983 |
|
ColonialWebb Contractors Company |
| Virginia |
| 03/30/1972 |
|
Comfort Systems USA (Arkansas), Inc. |
| Arkansas |
| 03/17/1998 |
|
Comfort Systems USA (Baltimore), LLC |
| Delaware |
| 10/15/1998 |
|
Comfort Systems USA (Indiana), LLC |
| Indiana |
| 06/08/2015 |
|
Comfort Systems USA (Intermountain), Inc. |
| Utah |
| 05/06/1969 |
|
Comfort Systems USA (Kentucky), Inc. |
| Kentucky |
| 02/10/1981 |
|
Comfort Systems USA (Mid South), Inc. |
| Alabama |
| 08/06/1998 |
|
Comfort Systems USA (MidAtlantic), LLC |
| Virginia |
| 01/01/2010 |
|
Comfort Systems USA (Northwest), Inc. |
| Washington |
| 02/14/1984 |
|
Comfort Systems USA (Ohio), Inc. |
| Ohio |
| 10/10/1979 |
|
Comfort Systems USA (South Central), Inc. |
| Texas |
| 05/24/2007 |
|
Comfort Systems USA (Southeast), Inc. |
| Delaware |
| 03/24/1998 |
|
Comfort Systems USA (Southwest), Inc. |
| Arizona |
| 12/23/1977 |
|
Comfort Systems USA (Syracuse), Inc. |
| New York |
| 03/08/1965 |
|
Comfort Systems USA (Texas), L.P. |
| Texas |
| 08/14/1998 |
|
Comfort Systems USA Energy Services, Inc. |
| Delaware |
| 08/25/1997 |
|
Comfort Systems USA G.P., Inc. |
| Delaware |
| 08/12/1998 |
|
Comfort Systems USA Strategic Accounts, LLC |
| Indiana |
| 07/28/1998 |
|
ConServ Building Services of Alabama, LLC |
| Alabama |
| 12/28/2012 |
|
ConServ Building Services of Georgia, LLC |
| Georgia |
| 11/04/2008 |
|
ConServ Building Services of Tennessee, LLC |
| Tennessee |
| 01/07/2010 |
|
ConServ Building Services of Texas, LLC |
| Texas |
| 01/22/2010 |
|
ConServ Building Services, LLC |
| Florida |
| 01/05/2005 |
|
ConServ Building Services of North Carolina, LLC |
| North Carolina |
| 03/22/2010 |
|
Control Concepts Mechanical Services, LLC |
| Georgia |
| 01/17/2008 |
|
Control Concepts, LLC |
| Georgia |
| 12/16/1996 |
|
CSUSA (10), LLC |
| North Carolina |
| 10/21/2011 |
|
Delcard Associates, LLC |
| Delaware |
| 06/23/2000 |
|
Design Mechanical Incorporated |
| Colorado |
| 11/25/2003 |
|
Dilling Group Leasing Co., LLC |
| Indiana |
| 07/29/2016 |
|
ENTITY NAME |
| DOMESTIC |
| FORMATION |
|
Dilling Group, Inc. |
| Indiana |
| 12/14/1984 |
|
Dilling, LLC |
| Indiana |
| 12/29/1998 |
|
Dyna Ten Corporation |
| Texas |
| 06/26/1980 |
|
Dyna Ten Maintenance Services, LLC |
| Texas |
| 08/07/2006 |
|
Eastern Heating & Cooling, Inc. |
| New York |
| 12/19/1988 |
|
Eastern Refrigeration Co., Inc. |
| New York |
| 01/30/1990 |
|
Environmental Air Systems, LLC |
| North Carolina |
| 10/07/2011 |
|
Envirotrol, LLC |
| North Carolina |
| 10/28/2011 |
|
F. W. Dilling, LLC |
| Indiana |
| 12/06/1999 |
|
Generex, LLC |
| Indiana |
| 12/22/2017 |
|
Granite State Holdings Company, Inc. |
| Delaware |
| 11/03/2005 |
|
Granite State Plumbing & Heating, LLC |
| New Hampshire |
| 07/31/2001 |
|
Hess Mechanical, LLC |
| Maryland |
| 12/31/2015 |
|
Mechanical Technical Services, Inc. |
| Texas |
| 05/24/2007 |
|
MJ Comfort Plumbing, LLC |
| New York |
| 09/16/2014 |
|
MJ Mechanical Services, Inc. |
| Virginia |
| 12/12/1997 |
|
North American Mechanical, Inc. |
| Delaware |
| 03/17/1998 |
|
OFF, LLC |
| Indiana |
| 11/22/2002 |
|
Quality Air Heating & Cooling, Inc. |
| Michigan |
| 09/10/1980 |
|
Riddleberger Brothers, Inc. |
| Virginia |
| 12/22/1958 |
|
Royalaire Holdings, LLC |
| Florida |
| 03/22/2006 |
|
Royalaire Mechanical Services II, LLC |
| Florida |
| 09/27/2010 |
|
Royalaire Mechanical Services, LLC |
| Florida |
| 09/12/2006 |
|
S.I. Goldman Company, Inc. |
| Florida |
| 10/04/1976 |
|
S.M. Lawrence (Mississippi), Inc. |
| Mississippi |
| 04/05/2011 |
|
S.M. Lawrence Company, Inc. |
| Tennessee |
| 03/08/1973 |
|
Seasonair, Inc. |
| Maryland |
| 10/28/1966 |
|
ShoffnerKalthoff MES, Inc. |
| Tennessee |
| 05/18/2005 |
|
Temp Right Service, Inc. |
| Delaware |
| 09/25/1997 |
|
Trumbo Electric, Incorporated |
| Virginia |
| 06/02/1966 |
|