Document:

Exhibit 4(d)

                       COMMITMENT AMOUNT INCREASE REQUEST

                                November 21, 2005

Harris N.A.
    as Agent (the "AGENT")
    for the Lenders referred to below
111 West Monroe Street
Chicago, Illinois   60603

Attention: Joann Holman, Director

Re:
                      Amended and Restated Credit Agreement
                          dated as of October 14, 2005
             among EMCOR Group, Inc., the Lenders party thereto and
                              Harris N.A., as Agent
                   (as amended, modified or supplemented from
                     time to time, the "CREDIT AGREEMENT").
                     --------------------------------------

Ladies and Gentlemen:

        In accordance  with the Credit  Agreement,  the Company hereby  requests
that  the  Agent  consent  to an  increase  in the  aggregate  Commitments  (the
"COMMITMENT  AMOUNT  INCREASE"),  in accordance  with Section 1.10 of the Credit
Agreement,  to be effected by an increase in the  Commitment of Bank of Montreal
("BOM").  Capitalized  terms used herein without  definition shall have the same
meanings herein as such terms have in the Credit Agreement.

        After giving effect to such  Commitment  Amount  Increase,  and upon the
effectiveness of such Commitment Amount Increase,  the Commitment of BOM will be
as set forth on Attachment I hereto.

        On the date  hereof,  the  Company  agrees to pay to the Agent,  for the
account of BOM, a one-time,  non-refundable  upfront  fee in an amount  equal to
$6,250.

        THIS AGREEMENT SHALL BE DEEMED TO BE A CONTRACTUAL OBLIGATION UNDER, AND
SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE  WITH, THE LAWS OF THE STATE OF
ILLINOIS.

        The  Commitment  Amount  Increase  shall be effective  when the executed
consent of the Agent is received or otherwise in accordance with Section 1.10 of
the Credit  Agreement,  but not in any case prior to November 29, 2005. It shall
be a condition to the  effectiveness of the Commitment  Amount Increase that (i)
all fees and expenses  referred to in Section 1.10 of the Credit Agreement shall
have been paid and (ii) no Eurodollar  Loans shall be outstanding on the date of
such effectiveness.

<PAGE>

        The  Company  hereby  certifies  that no Default or Event of Default has
occurred and is continuing.

        Please indicate the Agent's  consent to such Commitment  Amount Increase
by signing the enclosed copy of this letter in the space provided below.

                                        Very truly yours,

                                        EMCOR GROUP, INC.

                                        By:
                                           ----------------------------------
                                           Name:
                                                -----------------------------
                                           Title:
                                                 ----------------------------

                                        BANK OF MONTREAL

                                        By:
                                           ----------------------------------
                                           Name:
                                                -----------------------------
                                           Title:
                                                 ----------------------------

The undersigned hereby consents
On this 29th day of November, 2005
to the above-requested Commitment
Amount Increase.

HARRIS N.A.,
  as Agent

By:
   -----------------------------------------
   Name:
        ------------------------------------
   Title:
         -----------------------------------

<PAGE>

                                  ATTACHMENT I

                  LENDER                                 COMMITMENT

            Bank of Montreal                             $30,000,000Exhibit 4(e)

                       COMMITMENT AMOUNT INCREASE REQUEST

                                November 21, 2005

Harris N.A.
    as Agent (the "AGENT")
    for the Lenders referred to below
111 West Monroe Street
Chicago, Illinois   60603

Attention: Joann Holman, Director

Re:
                      Amended and Restated Credit Agreement
                          dated as of October 14, 2005
             among EMCOR Group, Inc., the Lenders party thereto and
                              Harris N.A., as Agent
                   (as amended, modified or supplemented from
                     time to time, the "CREDIT AGREEMENT").
                     --------------------------------------

Ladies and Gentlemen:

        In accordance  with the Credit  Agreement,  the Company hereby  requests
that  the  Agent  consent  to an  increase  in the  aggregate  Commitments  (the
"COMMITMENT  AMOUNT  INCREASE"),  in accordance  with Section 1.10 of the Credit
Agreement,  to be effected by the addition of National City Bank of Indiana (the
"ADDITIONAL  LENDER")  as a Lender  under  the  terms of the  Credit  Agreement.
Capitalized  terms used herein without  definition  shall have the same meanings
herein as such terms have in the Credit Agreement.

        After giving effect to such  Commitment  Amount  Increase,  and upon the
effectiveness  of  such  Commitment  Amount  Increase,  the  Commitment  of  the
Additional Lender will be as set forth on Attachment I hereto.

        1.      The Additional  Lender hereby confirms that it has received,  to
the extent  requested by such Additional  Lender, a copy of the Credit Agreement
and the exhibits and  schedules  related  thereto,  together  with copies of the
documents  which were required to be delivered  under the Credit  Agreement as a
condition to the making of the Loans and other extensions of credit  thereunder.
The Additional Lender acknowledges and agrees that it has made and will continue
to make,  independently  and without reliance upon the Agent or any other Lender
and based on such documents and  information as it has deemed  appropriate,  its
own  credit  analysis  and  decisions  relating  to the  Credit  Agreement.  The
Additional  Lender further  acknowledges  and agrees that the Agent has not made
any  representations or warranties about the credit worthiness of the Company or
any  other  party to the  Credit  Agreement  or with  respect  to the  legality,
validity,  sufficiency or enforceability of the Credit Agreement or the value of
any security therefor.
<PAGE>

        2.      Except as otherwise provided in the Credit Agreement,  effective
as of the date of  acceptance  hereof by the Agent,  the  Additional  Lender (i)
shall be deemed automatically to have become a party to the Credit Agreement and
have all the rights and obligations of a "LENDER" under the Credit  Agreement as
if it were an  original  signatory  thereto  and (ii)  agrees to be bound by the
terms and conditions set forth in the Credit Agreement as if it were an original
signatory thereto.

        3.      The  Additional  Lender  hereby  advises  you of  the  following
administrative details with respect to its Loans and Commitment:

        (A)     Notices:

                Institution Name:  National City Bank of Indiana
                Address:  100 West Berry Street, Suite 800
                          Fort Wayne, Indiana  46802
                Telephone:  (260) 461-6248
                Facsimile:  (260) 461-6238

        (B)     Payment Instructions:

        4.      On the date hereof, the Company agrees to pay the Agent, for the
account of the Additional Lender, a one-time,  non-refundable upfront fee in the
amount equal to $18,750.

        THIS AGREEMENT SHALL BE DEEMED TO BE A CONTRACTUAL OBLIGATION UNDER, AND
SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE  WITH, THE LAWS OF THE STATE OF
ILLINOIS.

        The  Commitment  Amount  Increase  shall be effective  when the executed
consent of the Agent is received or otherwise in accordance with Section 1.10 of
the Credit  Agreement,  but not in any case prior to November 29, 2005. It shall
be a condition to the  effectiveness of the Commitment  Amount Increase that (i)
all fees and expenses  referred to in Section 1.10 of the Credit Agreement shall
have been paid and (ii) no Eurodollar  Loans shall be outstanding on the date of
such effectiveness.

        The  Company  hereby  certifies  that no Default or Event of Default has
occurred and is continuing.

        Please indicate the Agent's  consent to such Commitment  Amount Increase
by signing the enclosed copy of this letter in the space provided below.

<PAGE>

                                        Very truly yours,

                                        EMCOR GROUP, INC.

                                        By:
                                           -------------------------------------
                                           Name:
                                                --------------------------------
                                           Title:
                                                 -------------------------------

                                        NATIONAL CITY BANK OF INDIANA

                                        By:
                                           -------------------------------------
                                           Name:
                                                --------------------------------
                                           Title:
                                                 -------------------------------

The undersigned hereby consents
On this 29th day of November, 2005
to the above-requested Commitment
Amount Increase.

HARRIS N.A.,
  as Agent

By:
   -----------------------------------------
   Name:
        ------------------------------------
   Title:
         -----------------------------------

<PAGE>

                                  ATTACHMENT I

             LENDER                                    COMMITMENT

       National City Bank of Indiana                   $15,000,000

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