EXHIBIT 23.1

           CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

   We consent to the incorporation by reference in the Registration Statement
(Form S-8 No. 333-152764) pertaining to the 2008 EMCOR Group, Inc. Employee
Stock Purchase Plan, the Registration Statement (Form S-8 No. 333-147015)
pertaining to the 2007 Incentive Plan, the Registration Statement (Form S-8
No. 333-128840) pertaining to the 2005 Stock Plan for Directors and the 2005
Management Stock Incentive Plan, the Registration Statement (Form S-8 No.
333-120078) pertaining to the Stock Option Agreement Dated as of October 25,
2004 and the Restricted Share Unit Agreement Dated as of October 25, 2004,
the Registration Statement (Form S-8 No. 333-112940) pertaining to the Stock
Option Agreements dated as of January 4, 1999, May 5, 1999, January 3, 2000,
January 2, 2001, December 14, 2001, January 2, 2002, June 19, 2002, October
25, 2002, January 2, 2003, February 27, 2003, and January 2, 2004, the 2003
Non-Employee Directors' Stock Option Plan, the 2003 Management Stock
Incentive Plan, the Registration Statement (Form S-8 No. 333-86600)
pertaining to the EMCOR Group, Inc. Stock Option Agreements dated as of
January 4, 1999, February 23, 1999, January 3, 2000, March 3, 2000, January
2, 2001, and December 17, 2001, the Registration Statement (Form S-8 No. 333-
75449) pertaining to the 1997 Non-Employee Directors' Non-Qualified Stock
Option Plan of EMCOR Group, Inc. and the 1997 Stock Plan for Directors of
EMCOR Group, Inc., the Registration Statement (Form S-8 No. 333-02819)
pertaining to the 1994 Management Stock Option Plan of EMCOR Group, Inc. and
1995 Non-Employee Directors' Non-Qualified Stock Option Plan of EMCOR Group,
Inc., of our reports dated February 24, 2009, with respect to the
consolidated financial statements and schedule of EMCOR Group, Inc., and the
effectiveness of internal control over financial reporting of EMCOR Group,
Inc., included in the Annual Report (Form 10-K) for the year ended December
31, 2008.


Stamford, Connecticut                                     /s/ ERNST & YOUNG LLP
February 24, 2009