Comfort Systems USA (FIX) 10-K2020 FY Annual report

Filed: 25 Feb 21, 4:18pm

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New words: advent, Agent, Aid, arbitration, bankrupt, categorized, cease, celebrate, certiorari, Cisco, color, content, Culture, dba, declared, deferral, deviate, dignity, diminished, disability, disease, dispute, distancing, Duke, emergency, English, essential, ethically, exacerbate, foundation, frame, gender, genetic, guide, half, harassment, honest, inactive, inclusion, indoor, inefficiency, JCT, Joint, Kingsport, legacy, likelihood, live, meaningfully, metropolitan, micro, movement, multidisciplined, nonpayment, notional, orientation, outbreak, outlined, outreach, outset, overnight, overseeing, pandemic, permanent, plant, pool, portfolio, procedure, profile, pronounced, race, RAR, rebate, receipt, refund, reinforced, religion, representation, rest, restructuring, safe, scarce, sex, sexual, social, spirit, stronger, subset, Supreme, swap, systematic, TAS, TEC, temporarily, textual, travel, underrepresented, unexpectedly, Unsettled, veteran, World, worsening, yield

Removed: authoritative, BP, British, calling, cautiously, classification, conserve, copy, DC, Deepwater, doubtful, earn, Hampshire, Horizon, intensify, light, NE, netted, Novar, oil, Petroleum, prohibited, provisional, qualification, reevaluated, Reform, remeasurement, rental, retrospective, room, solid, southeastern, spill, Street, Tampa, transition, unaudited, vehicle, Washington

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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