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EX-32.2 - EX-32.2 - COMFORT SYSTEMS USA INCfix-20201231xex32d2.htm
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EX-31.2 - EX-31.2 - COMFORT SYSTEMS USA INCfix-20201231xex31d2.htm
EX-31.1 - EX-31.1 - COMFORT SYSTEMS USA INCfix-20201231xex31d1.htm
EX-23.1 - EX-23.1 - COMFORT SYSTEMS USA INCfix-20201231xex23d1.htm
10-K - 10-K - COMFORT SYSTEMS USA INCfix-20201231x10k.htm

EXHIBIT 21.1

SUBSIDIARIES OF COMFORT SYSTEMS USA, INC.

as of December 31, 2020

ENTITY NAME

    

DOMESTIC
JURISDICTION

    

FORMATION
DATE

 

ACI Mechanical, Inc.

Delaware

06/26/1998

Acorn Industrial, LLC

North Carolina

01/03/1997

Air Systems Engineering, Inc.

Washington

05/18/1973

AirTemp, Inc.

Maine

10/15/1998

Altrax Tool and Equipment Co LLC

Tennessee

12/03/2018

ARC Comfort Systems USA, Inc.

Delaware

03/17/1998

Armani East LLC

New York

12/03/2018

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

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 (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 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 North Carolina, LLC

North Carolina

03/22/2010

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

Control Concepts Mechanical Services, LLC

Georgia

01/17/2008

Control Concepts, LLC

Georgia

12/16/1996

CSUSA (10), LLC

North Carolina

10/21/2011

Design Mechanical Incorporated

Colorado

11/25/2003

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

Environmental Air Systems, LLC

North Carolina

10/07/2011

Envirotrol, LLC

North Carolina

10/28/2011

F. W. Dilling, LLC

Indiana

12/06/1999


ENTITY NAME

    

DOMESTIC
JURISDICTION

    

FORMATION
DATE

 

Dyna Ten Maintenance Services, LLC

Texas

08/07/2006

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

Ind-Com Electric Company, LLC

North Carolina

12/08/2009

Mechanical Technical Services, Inc.

Texas

05/24/2007

MJ Mechanical Services, Inc.

Virginia

12/12/1997

MODSEC, Inc.

North Carolina

05/04/2018

North American Mechanical, Inc.

Delaware

03/17/1998

OFF, LLC

Indiana

11/22/2002

Post Oak Insurance Co. Ltd.

Cayman Islands

10/04/2019

Premier Prefabrication Solutions, LLC

Texas

01/16/2018

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 Company, Inc.

Tennessee

03/08/1973

Seasonair, Inc.

Maryland

10/28/1966

ShoffnerKalthoff MES, Inc.

Tennessee

05/18/2005

Starr Electric Company, Incorporated

North Carolina

07/27/1942

TAS Australia Pty Ltd.

Australia

06/28/2012

TAS Energy Inc.

Delaware

04/30/2010

TAS GP, LLC

Delaware

07/19/2007

TAS Modular Data Limited

Ireland

11/20/2019

Temp Right Service, Inc.

Delaware

09/25/1997

Tennessee Electric Company, Inc.

Tennessee

06/02/1961

Trumbo Electric, Incorporated

Virginia

06/02/1966

Turbine Air Systems, Ltd.

Texas

02/03/1998

Walker Electrical Contractors, Inc.

Texas

03/23/2010

Walker Engineering, Inc.

Texas

01/29/2002

Walker Industrial, LLC

Texas

12/12/2014

Walker Logistics, LLC

Texas

01/10/2013

Walker Service Group, LLC

Texas

03/14/2013

Walker TX Holding Company, LLC

Texas

05/13/2013