EXHIBIT 23.1

            CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

     We consent to the incorporation by reference in the following  Registration
Statements:

     (1)   Registration  Statement  (Form S-8 No.  333-02819)  pertaining to the
           1994 Management  Stock Option Plan of EMCOR Group,  Inc. and the 1995
           Non-Employee  Directors'  Non-Qualified  Stock  Option  Plan of EMCOR
           Group, Inc.,

     (2)   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.,

     (3)   Registration  Statement (Form S-8 No.  333-112940)  pertaining to the
           Executive   Stock  Bonus  Plan  of  EMCOR  Group,   Inc.,   the  2003
           Non-Employee  Directors' Stock Option Plan of EMCOR Group,  Inc., the
           2003 Management  Stock Incentive Plan of EMCOR Group,  Inc.,  certain
           stock option  agreements  between EMCOR Group,  Inc. and directors of
           EMCOR Group, Inc. and certain stock option  agreements  between EMCOR
           Group, Inc. and executive officers of EMCOR Group, Inc.,

     (4)   Registration Statement (Form S-8 No. 333-86600) pertaining to certain
           stock  option  agreements  between  EMCOR Group,  Inc. and  specified
           employees of EMCOR Group, Inc., and

     (5)   Registration  Statement (Form S-8 No. 333-120078)  pertaining  to the
           registration of 55,000 shares of common stock;

     of our  reports  dated March 8,  2005,  with  respect to  the  consolidated
     financial  statements and schedule of EMCOR Group,  Inc., EMCOR Group, Inc.
     management's  assessment  of the  effectiveness  of internal  control  over
     financial   reporting  and  the  effectiveness  of  internal  control  over
     financial  reporting of EMCOR Group,  Inc.,  included in this Annual Report
     (Form 10-K) for the year ended December 31, 2004.




Stamford, Connecticut                                   /S/ ERNST & YOUNG LLP
March 8, 2005