First Supplement to Security Agreement

EXHIBIT 4.1(b)

EMCOR GROUP, INC.

First Supplement to Security Agreement

THIS FIRST SUPPLEMENT TO SECURITY AGREEMENT (the “Supplement”) is dated as of this 21^st day of November, 2011 among EMCOR Group, Inc. (the “Company”), the other Debtors party hereto, and Bank of Montreal, as collateral agent (the “Agent”).

Preliminary Statements

A. The Debtors listed under the heading “Existing Debtors” on the signature pages attached hereto and the Agent are party to that certain Third Amended and Restated Security Agreement dated as of February 4, 2010 (such Security Agreement, as the same may from time to time be amended, modified or restated, being hereinafter referred to as the “Security Agreement”). All capitalized terms used herein without definition shall have the same meanings herein as such terms are defined in the Security Agreement.

B. Pursuant to the Security Agreement, the Existing Debtors granted to the Agent, for the benefit of the Secured Creditors, among other things, a continuing security interest in all of their personal property and fixtures as described therein.

C. Concurrently herewith, the Company, EMCOR Group (UK) plc., a United Kingdom public limited company (“EMCOR UK”), Agent, and certain other parties are entering into a Third Amended and Restated Credit Agreement dated as of even date herewith (such Credit Agreement, as the same may from time to time be amended, modified or restated, being hereinafter referred to as the “Credit Agreement”).

D. The Company wishes to (i) add certain of the Company’s subsidiaries listed under the heading “Additional Debtors” on the signature pages attached hereto as Debtors under the Security Agreement (the “Additional Debtors”; and together with the Existing Debtors, the “Debtors”), (ii) update Schedules A through F to the Security Agreement, and (iii) make certain other changes to the Security Agreement and the Agent is willing to do so on the terms and conditions set forth herein.

E. The Company and EMCOR UK provide the Debtors (other than the Company) with substantial financial, managerial, administrative, technical and design support and the Debtors will directly and substantially benefit from credit and other financial accommodations extended and to be extended by the Secured Creditors to the Company and EMCOR UK.

NOW, THEREFORE, in consideration of the benefits accruing to the Debtors, and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows:

1. Each Additional Debtor acknowledges and agrees that it shall become a “Debtor” party to the Security Agreement effective upon the date such Additional Debtor’s execution of this Agreement and the delivery of this Agreement to the Agent, and that upon such execution and delivery, all references in the Security Agreement to the terms “Debtor” or “Debtors” shall be deemed to include such Additional Debtor. Each Additional Debtor hereby acknowledges and agrees that the Obligations are secured by all of the Collateral according to, and otherwise on and subject to, the terms and conditions of the Security Agreement to the same extent and with the same force and effect as if such Additional Debtor had originally been one of the Existing Debtor under the Security Agreement and had originally executed the same as such an Existing Debtor.

2. Without limiting the generality of the foregoing, the Debtors hereby repeat and reaffirm all grants (including the grant of a lien and security interest), covenants, agreements, representations and warranties contained in the Security Agreement as supplemented hereby, each and all of which are and shall remain applicable to the Collateral from time to time owned by the Debtors or in which the Debtors from time to time have any rights. Without limiting the foregoing, in order to secure payment of the Obligations, whether now existing or hereafter arising, the Debtors hereby grant to the Agent for the benefit of the Secured Creditors, and hereby agrees that the Agent has and shall continue to have for the benefit of the Secured Creditors a continuing security interest in, among other things, all of the Debtors’ Collateral (as such term is defined in the Security Agreement), including, without limitation, all of the Debtors’ Receivables, Leases, General Intangibles, Inventory, Equipment, Investment Property, Pledged Notes, and all of the other Collateral described in, and subject to the limitations set forth in, Section 2 of the Security Agreement, each and all of such granting clauses being incorporated herein by reference with the same force and effect as if set forth in their entirety except that all references in such clauses to the Debtors or any of them shall be deemed to include references to the Additional Debtors. Nothing contained herein shall in any manner impair the priority of the liens and security interests heretofore granted in favor of the Agent under the Security Agreement.

3. The foregoing notwithstanding, (i) references to Borrowers in the Security Agreement shall be deemed to be references to the Company, EMCOR UK and any other Subsidiary of the Company that is designated as a Borrower under the Credit Agreement and (ii) references to the Credit Agreement in the Security Agreement shall be deemed references to the Credit Agreement as defined herein.

4. Schedules A through F to the Security Agreement shall be amended and restated in the form of Schedule A, B, C, D, E and F, respectively, attached hereto.

5. The Debtors agree to execute and deliver such further instruments and documents and do such further acts and things as the Agent may deem necessary or proper to carry out more effectively the purposes of this Supplement.

-2-

6. This Supplement may be executed in any number of counterparts and by different parties hereto on separate counterparts, each of which when so executed shall be an original but all of which to constitute one and the same instrument. Except as specifically amended and modified hereby, all of the terms and conditions of the Security Agreement shall stand and remain unchanged and in full force and effect.

7. No reference to this Supplement need be made in the Security Agreement or in any other document or instrument making reference to the Security Agreement, any reference to the Security Agreement in any of such items to be deemed a reference to the Security Agreement as supplemented hereby.

8. This Supplement shall be governed by and construed in accordance with the State of Illinois (without regard to principles of conflicts of law).

[Signature Page Follows.]

-3-

Dated as of the date first above written.


“Existing Debtors”

EMCOR Group, Inc.

By:	/s/ ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇

	Name:	▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇
	Title:	President and Chief Executive Officer

Forti/▇▇▇▇▇ and ▇▇▇▇, L.L.C.

By:	/s/ R. ▇▇▇▇▇ ▇▇▇▇

	Name:	R. ▇▇▇▇▇ ▇▇▇▇
	Title:	Manager

CSUSA Holdings L.L.C.

By:	/s/ R. ▇▇▇▇▇ ▇▇▇▇

	Name:	R. ▇▇▇▇▇ ▇▇▇▇
	Title:	Manager

Trimech Plumbing L.L.C.

By:	/s/ R. ▇▇▇▇▇ ▇▇▇▇

	Name:	R. ▇▇▇▇▇ ▇▇▇▇
	Title:	Manager

▇▇▇▇▇▇▇▇▇ & Son, L.P.
By:	CSUSA Holdings L.L.C., its General Partner

By:	/s/ R. ▇▇▇▇▇ ▇▇▇▇

	Name:	R. ▇▇▇▇▇ ▇▇▇▇
	Title:	Vice President

Signature Page to Security Agreement Supplement

S-1


Border Electric Co., L.P.
By:	CSUSA Holdings L.L.C., its General Partner

By:	/s/ R. ▇▇▇▇▇ ▇▇▇▇

	Name:	R. ▇▇▇▇▇ ▇▇▇▇
	Title:	Vice President

Border Mechanical Co., L.P.
By:	CSUSA Holdings L.L.C., its General Partner

By:	/s/ R. ▇▇▇▇▇ ▇▇▇▇

	Name:	R. ▇▇▇▇▇ ▇▇▇▇
	Title:	Vice President

Professional Mechanical Contractors, L.L.C.

By:	/s/ R. ▇▇▇▇▇ ▇▇▇▇

	Name:	R. ▇▇▇▇▇ ▇▇▇▇
	Title:	Vice President

Welsbach Electric Corp.

By:	/s/ ▇▇▇▇▇ ▇. ▇▇▇▇▇▇

	Name:	▇▇▇▇▇ ▇. ▇▇▇▇▇▇
	Title:	President / Chief Executive Officer

Signature Page to Security Agreement Supplement

S-2


		Air Systems, Inc.
		Atlantic Coast Mechanical, Inc.
		Beaumont Real Estate Holding Company
		Building Technology Engineers, Inc.
		Central Mechanical Construction Co., Inc.
		CES Facilities Management Services, Inc.
		Combustioneer Corporation
		Contra Costa Electric, Inc.
		CS48 Acquisition Corp.
		▇▇▇▇▇-▇▇▇▇▇▇▇ INC. (f/k/a The ▇▇▇▇ ▇. ▇▇▇▇▇ Co.)
		Design Air, Limited
		▇▇▇▇▇ Mechanical Corp.
		Dyn Specialty Contracting, Inc.
		Dynalectric Company
		Dynalectric Company of Nevada
		Dynalectric Company of Ohio
		Dynalectric of Michigan II, Inc.
		EMCOR Construction Services, Inc.
		EMCOR-CSI Holding Co.
		EMCOR Energy Services, Inc.
		EMCOR Facilities Services, Inc.
		EMCOR Government Services, Inc.
		EMCOR ▇▇▇▇▇, Inc.
		EMCOR ▇▇▇▇ Electric Co. of Indiana, Inc.
		EMCOR International Inc.
		EMCOR Mechanical/Electrical Services (East), Inc.
		EMCOR Services Arizona, Inc.
		EMCOR Services Northeast, Inc.
		EMCOR Services New York/New Jersey, Inc.
		EMCOR Services Team Mechanical, Inc.
		F & G Management, Inc.
		F & G Plumbing, Inc.
		Fluidics, Inc.
		Forest Electric Corp.
		FR X ▇▇▇▇▇▇▇▇ Acquisitions Co.
		▇▇▇▇▇▇ Electric Co., Inc.
		Great Monument Construction Company
		▇▇▇▇▇▇ Mechanical Contractors, Inc.
		Heritage Mechanical Services, Inc.
		Hillcrest Sheet Metal, Inc.

Signature Page to Security Agreement Supplement

S-3


		HNT Holdings Inc.
		HVAC, Ltd.
		▇▇▇▇▇▇▇▇▇▇▇-▇▇▇▇▇▇▇ Mechanical, Inc.
		Inte-Fac Corp.
		▇.▇. ▇▇▇▇▇▇▇ Corp.
		KDC Inc.
		▇▇▇▇▇▇▇ Service, Inc.
		L.T. Mechanical, Inc.
		Labov Mechanical, Inc.
		Labov Plumbing, Inc.
		▇▇▇▇▇▇ Electric Company, Inc.
		▇▇▇▇▇▇▇ Mechanical Corporation
		▇▇▇▇▇▇▇▇ Mechanical Co., Inc.
		Maximum Refrigeration & Air Conditioning Corp.
		Meadowlands Fire Protection Corp.
		Mechanical Services of Central Florida, Inc.
		MES Holdings Corporation
		Mesa Energy Systems, Inc.
		Midland Fire Protection, Inc.
		Monumental Heating, Ventilating and Air Conditioning Contractors, Inc.
		Monumental Investment Corporation
		▇▇▇▇▇ & Black Mechanical, Inc.
		North Jersey Mechanical Contractors, Inc.
		▇▇▇▇▇▇▇▇ Industrial Services Inc.
		Pace Mechanical Services II, Inc.
		Penguin Air Conditioning Corp.
		Penguin Maintenance and Services Inc.
		Performance Mechanical, Inc.
		▇▇▇▇▇ & ▇▇▇▇ Company of Florida
		▇▇▇▇▇ and Kent-New England, Inc.
		▇▇▇▇▇ and ▇▇▇▇-Connecticut, Inc.
		▇. ▇. ▇▇▇▇▇▇▇▇ & Company, Inc.
		▇▇▇▇▇▇ Equipment & Manufacturing Company
		▇. ▇. ▇▇▇▇▇▇▇▇ Co., Inc.
		The Betlem Service Corporation
		The ▇▇▇▇▇ Company
		The ▇▇▇▇▇ and Kent Company
		The ▇▇▇▇▇ and ▇▇▇▇ Corporation
		▇▇▇▇▇▇▇▇ & ▇▇▇▇▇▇, Inc.
		University ▇▇▇▇▇▇▇▇ Mechanical, Inc.

Signature Page to Security Agreement Supplement

S-4


University Mechanical & Engineering
		Contractors, Inc., a California
		corporation
University Mechanical & Engineering
		Contractors, Inc., an Arizona
		corporation
▇▇▇▇▇▇-j-▇▇▇▇▇▇, Inc.
Welsbach Electric Corp. of L.I.

By:	/s/ R. ▇▇▇▇▇ ▇▇▇▇

	Name:		R. ▇▇▇▇▇ ▇▇▇▇
	Title:		Vice President

F & G Mechanical Corporation

By:		/s/ SalvatoreFichera

		Name:	▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇
		Title:	President

Aircond Corporation
MOR PPM, Inc.
New England Mechanical Services, Inc.
New England Mechanical Services of Massachusetts, Inc.
▇▇▇▇ Services, Inc.

By:		/s/ ▇▇▇▇▇▇▇ ▇▇▇▇▇

		Name:	▇▇▇▇▇▇▇ ▇▇▇▇▇
		Title:	Vice President

Ohmstede Partners LLC

By:		/s/ R. ▇▇▇▇▇ ▇▇▇▇

		Name:	R. ▇▇▇▇▇ ▇▇▇▇
		Title:	Manager

Signature Page to Security Agreement Supplement

S-5


Ohmstede Holdings LLC

By:	/s/ R. ▇▇▇▇▇ ▇▇▇▇

	Name:	R. ▇▇▇▇▇ ▇▇▇▇
	Title:	Manager

▇▇▇▇▇▇▇▇ Ltd.
By:	Ohmstede Partners LLC, its General Partner

By:	/s/ R. ▇▇▇▇▇ ▇▇▇▇

	Name:	R. ▇▇▇▇▇ ▇▇▇▇
	Title:	Vice President

“Additional Debtors”

▇▇▇▇▇▇▇, Inc.
▇▇▇▇▇▇▇ Holdings, Inc.
Intermech, Inc.
Mechanical Specialties Contractors, Inc.
▇▇▇▇▇▇▇ Industries Corporation

By:	/s/ R. ▇▇▇▇▇ ▇▇▇▇

	Name:	R. ▇▇▇▇▇ ▇▇▇▇
	Title:	Vice President

EMCOR Services CES, Inc.
▇▇▇▇▇ ▇▇▇▇▇▇ & Associates, Inc.
USM, Inc.
USM (Delaware) Inc.
USM Services Holdings, Inc.

By:	/s/ ▇▇▇▇▇▇▇ ▇▇▇▇▇

	Name:	▇▇▇▇▇▇▇ ▇▇▇▇▇
	Title:	Vice President

Signature Page to Security Agreement Supplement

S-6


▇▇▇▇▇▇▇ Environmental Specialties, LLC

By:	/s/ R. ▇▇▇▇▇ ▇▇▇▇

	Name:	R. ▇▇▇▇▇ ▇▇▇▇
	Title:	Manager

Signature Page to Security Agreement Supplement

S-7


Accepted and agreed to in Chicago, Illinois, as of the date first above written.

Bank of Montreal, as Agent

By	/s/ ▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇

	Name:	▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇
	Title:	Director

Signature Page to Security Agreement Supplement

S-8

Schedule A


Name of Debtor (And Organizational No.)	Chief Executive Office	Additional Places of Business	Location of Collateral Held by Debtor

EMCOR Group, Inc. (Delaware Corporation) Org. No. 2120222	▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

EMCOR Construction Services, Inc. (Delaware Corporation) Org. No. 2295158	▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	See Columns 2 & 3

EMCOR Facilities Services, Inc. (Delaware Corporation) Org. No. 2625001	▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇▇ ▇▇▇▇▇ ▇▇▇▇. ▇▇▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇., ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇. ▇▇▇▇▇▇▇, ▇▇	See Columns 2 & 3

EMCOR Services CES, Inc. (Delaware corporation) Org. No. 5014397	▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇., ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2
Mesa Energy Systems, Inc. (California Corporation) Org. No.1281860	5 Vanderbilt ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇ #▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇. ▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇	See Columns 2 & 3


Name of Debtor (And Organizational No.)	Chief Executive Office	Additional Places of Business	Location of Collateral Held by Debtor
		d/b/a Emcor Services Hillcrest ▇▇▇▇ ▇▇▇▇▇▇ ▇▇. ▇▇▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇

		▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇ #▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇

		▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇ #▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇

▇▇▇▇▇▇▇ Industries Corporation (Pennsylvania Corporation) Org. No. 647338	▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇. ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇ ▇▇▇▇▇▇▇ ▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇

EMCOR International Inc. (Delaware Corporation) Org. No. 2184202	▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

EMCOR Mechanical/Electrical Services (East), Inc. (Delaware Corporation) Org. No. 2293360	▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

EMCOR Energy Services, Inc. (Delaware Corporation) Org. No.2704011	▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇▇ ▇▇▇▇ ▇▇▇▇▇ ▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	See Columns 2 & 3

Heritage Mechanical Services, Inc. (New York Corporation) None	▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

Welsbach Electric Corp. (Delaware Corporation) Org. No.0780011	▇▇▇-▇▇ ▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇-▇▇▇▇		See Column 2

A-2


Name of Debtor (And Organizational No.)	Chief Executive Office	Additional Places of Business	Location of Collateral Held by Debtor

Forest Electric Corp. (New York Corporation) Org. No. None	▇ ▇▇▇▇ ▇▇▇▇▇, ▇▇. ▇ ▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇. ▇▇▇▇▇▇▇, ▇▇▇▇▇ ▇▇ ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	See Columns 2 & 3

Welsbach Electric Corp. of L.I. (New York Corporation) Org. No. None	▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

Penguin Maintenance and Services Inc (Delaware Corporation) Org. No. 2251604	▇▇ ▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇▇		See Column 2

Penguin Air Conditioning Corp. (New York Corporation) Org. No. None	▇▇ ▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

▇.▇. ▇▇▇▇▇▇▇ Corp. (Delaware Corporation) Org. No. 2232450	▇▇ ▇▇▇▇▇ ▇▇▇, ▇▇. ▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	d/b/a ▇▇▇▇▇▇ Mechanical ▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	See Columns 2 & 3

▇▇▇▇▇ Mechanical Corp. (Maryland Corporation) Org. No. D03916020	▇▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

EMCOR ▇▇▇▇ Electric Co. of Indiana, Inc. (Delaware Corporation) Org. No. 2267293	▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

▇▇▇▇▇▇ Electric Co., Inc. (New Jersey Corporation) Org. No. 0100081753	▇▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Columns 2 & 3

University Mechanical & Engineering Contractors, Inc. (California Corporation) Org. No. 527647	▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2
Pace Mechanical Services II, Inc. (Michigan Corporation)	▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇. ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇		See Column 2

A-3


Name of Debtor (And Organizational No.)	Chief Executive Office	Additional Places of Business	Location of Collateral Held by Debtor
Org. No. 488043	48071

University Mechanical & Engineering Contractors, Inc. (Arizona Corporation) Org. No. 0059955-4	▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

▇▇▇▇▇▇ Mechanical Contractors, Inc. (Nevada Corporation) Org. No. C324-1971	▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2
Design Air, Limited (Washington Corporation) Org. No. 600314241	▇▇▇▇ ▇▇▇▇▇ ▇▇▇^▇▇ ▇▇▇▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇-▇▇▇▇		See Column 2

▇▇▇▇▇▇▇▇ & ▇▇▇▇▇▇, Inc. (Colorado Corporation) Org. No. 19911078279	▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	See Columns 2 & 3

EMCOR ▇▇▇▇▇, Inc. (Texas Corporation) Org. No.▇▇▇▇▇▇▇▇▇▇	▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

Inte-Fac Corp. (New York Corporation) Org. No. None	▇▇ ▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

MES Holdings Corporation (Delaware Corporation) Org. No. 2441388	▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

▇. ▇. ▇▇▇▇▇▇▇▇ & Company, Inc. (Virginia Corporation) Org. No. 179532	▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

Labov Mechanical, Inc. (Delaware Corporation) Org. No. 2693486	▇▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇. ▇▇▇▇▇ ▇ ▇▇▇▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

A-4


Name of Debtor (And Organizational No.)	Chief Executive Office	Additional Places of Business	Location of Collateral Held by Debtor

Labov Plumbing, Inc. (Delaware Corporation) Org. No. 2693386	▇▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇. ▇▇▇▇▇ ▇ ▇▇▇▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

Dynalectric Company of Ohio (Ohio Corporation) Org. No. 807660	▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

Dynalectric of Michigan II, Inc. (Delaware Corporation) Org. No. 2822379	▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇ ▇▇▇▇▇	▇▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇. ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	See Column 2

▇▇▇▇▇-▇▇▇▇▇▇▇ Inc. (Delaware Corporation) Org. No. 2945595	▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇▇▇ ▇. ▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ d/b/a Dynaelectric Ohio ▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇-▇▇▇▇	See Column 2 & 3

A-5


Name of Debtor (And Organizational No.)	Chief Executive Office	Additional Places of Business	Location of Collateral Held by Debtor

▇▇▇▇▇▇▇▇ Mechanical Co., Inc. (California Corporation) Org. No. C2114848	▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇. ▇▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	See Columns 2 & 3

Dynalectric Company (Delaware Corporation) Org. No. 2722041	▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇, #▇▇▇ ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	See Columns 2 & 3

		d/b/a ▇▇▇▇▇▇▇▇ Dynalectric of Colorado ▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇. ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇. ▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇

		▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇ ▇▇▇^▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇

A-6


Name of Debtor (And Organizational No.)	Chief Executive Office	Additional Places of Business	Location of Collateral Held by Debtor

		▇▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇. ▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇, ▇▇▇▇▇ ▇▇▇ ▇▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇ d/b/a Wasatch Electric ▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇

Dyn Specialty Contracting, Inc. (Virginia Corporation) Org. No. 295431	▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇, #▇▇▇ ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

KDC Inc. (California Corporation) Org. No. 770706	▇▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	d/b/a KDC Systems ▇▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ d/b/a KDC Systems ▇▇▇▇ ▇. ▇. ▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	See Columns 2 & 3

Contra Costa Electric, Inc. (California Corporation) Org. No. C0273069	▇▇▇ ▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	See Columns 2 & 3

Dynalectric Company of Nevada (Nevada Corporation) Org. No. C238-1958	▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇ ▇▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

A-7


Name of Debtor (And Organizational No.)	Chief Executive Office	Additional Places of Business	Location of Collateral Held by Debtor

EMCOR Services Northeast, Inc. (Massachusetts Corporation) Org. No. None	▇▇ ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Columns 2 & 3

Building Technology Engineers, Inc. (Massachusetts Corporation) Org. No. None ▇▇▇▇▇ & Kent Company of Florida (Delaware Corporation) Org. No. 3818963	▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇.▇. ▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇▇ ▇▇▇▇▇ ▇▇▇▇. ▇▇▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇▇▇▇ ▇▇▇ ▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇	See Columns 2 & 3

Monumental Investment Corporation (Maryland Corporation) Org. No. D01289180	▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

The ▇▇▇▇▇ and Kent Company (Maryland Corporation) Tax I.D. ▇▇-▇▇▇▇▇▇▇ Org. No. D00174458	▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

The ▇▇▇▇▇ and ▇▇▇▇ Corporation (Maryland Corporation) Org. No. D00174466	▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

	d/b/a ▇▇▇▇▇ and ▇▇▇▇ Construction Services ▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇
▇. ▇. ▇▇▇▇▇▇▇▇ Co., Inc. (Ohio Corporation) Org. No. 437451	▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇	See Columns 2 & 3
		▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇
		▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇

A-8


Name of Debtor (And Organizational No.)	Chief Executive Office	Additional Places of Business	Location of Collateral Held by Debtor
		▇▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇

		▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇ ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇

		▇▇▇▇ ▇. ▇▇^▇▇ ▇▇▇▇▇▇, ▇▇▇▇ ▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇

		▇▇ ▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇▇, ▇▇

		▇▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇

Air Systems, Inc. (California Corporation) Org. No.C2497209	▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

Fluidics, Inc. (Pennsylvania Corporation) Org. No. 766706	▇▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇., ▇▇▇▇▇ ▇ ▇▇▇▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

University ▇▇▇▇▇▇▇▇ Mechanical, Inc. (Delaware Corporation) Org. No. 4047723	▇▇▇▇ ▇. ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇

Midland Fire Protection, Inc. (Rhode Island Corporation) Org. No. 56289	▇▇ ▇▇▇▇▇ ▇▇▇ ▇.▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

▇▇▇▇▇ and Kent-Connecticut, Inc. (Maryland Corporation) Org. No. D04800199	▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

▇▇▇▇▇ and ▇▇▇▇ – New England, Inc. (Maryland Corporation) Org. No.D03688207	▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

A-9


Name of Debtor (And Organizational No.)	Chief Executive Office	Additional Places of Business	Location of Collateral Held by Debtor

Monumental Heating, Ventilating and Air Conditioning Contractors, Inc. (Maryland Corporation) Org. No. D04254868	▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

Forti/▇▇▇▇▇ and ▇▇▇▇, L. L. C. (Maryland LLC) Org. No. W04265096	▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

HVAC, Ltd. (Maryland Corporation) Org. No. D00816884	▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

Atlantic Coast Mechanical, Inc. (Maryland Corporation) Org. No. D01557800	▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

Great Monument Construction Company (Maryland Corporation) Org. No. D01495571	▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

EMCOR- CSI Holding Co. (Delaware Corporation) Org. No. 3486633	▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

Border Electric Co., L.P. (Texas Limited Partnership) Org. No. 0012427910	▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

Border Mechanical Co., L.P. (Texas Limited Partnership) Org. No. 0012428010	▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

Central Mechanical Construction Co., Inc. (Delaware Corporation) Org. No. 2892099	▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇▇ ▇▇ ▇▇▇▇▇▇▇ ▇▇ ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	See Columns 2 & 3
▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇ Corp.	301 ▇▇▇▇▇▇▇ Seven	▇▇▇ ▇▇▇▇ ▇▇^▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	See Column 2

A-10


Name of Debtor (And Organizational No.)	Chief Executive Office	Additional Places of Business	Location of Collateral Held by Debtor
(Delaware Corporation) Org. ▇▇. ▇▇▇▇▇▇▇	▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇

CSUSA Holdings L.L.C. (Delaware Corporation) disregarded entity Org. No. 3467627	▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

F & G Mechanical Corporation (Delaware Corporation) Org. No. 2850884	▇▇▇ ▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Columns 2 & 3

F & G Plumbing, Inc. (New Jersey Corporation) Org. No. 0100873145	▇▇▇ ▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Columns 2 &3

EMCOR Services New York/ New Jersey, Inc. (Delaware Corporation) Org. No. 2930475	▇▇-▇▇ ▇▇^▇▇ ▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	See Columns 2 & 3

Hillcrest Sheet Metal, Inc. (Delaware Corporation) Org. No. 2788607	▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

▇▇▇▇▇▇▇▇▇▇▇-▇▇▇▇▇▇▇ Mechanical, Inc. (Delaware Corporation) Org. No. 2913106	▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	See Column 2 and 3

▇▇▇▇▇▇▇ Service, Inc. (Ohio Corporation) Org. No. 581186	▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Columns 2 & 3
▇▇▇▇▇▇ Electric Company, Inc. (Tennessee Corporation) Org. No. 0154850	▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇, ▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2
▇▇▇▇▇▇▇ Mechanical Corporation (New York Corporation) Org. No. None	▇▇▇ ▇▇▇▇ ▇▇^▇▇ ▇▇▇▇▇▇, ▇▇▇▇▇ ▇▇▇▇-▇▇ ▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇-▇▇ ▇▇^▇▇ ▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇	See Columns 2 & 3

A-11


Name of Debtor (And Organizational No.)	Chief Executive Office	Additional Places of Business	Location of Collateral Held by Debtor

Maximum Refrigeration & Air Conditioning Corp. (Delaware Corporation) Org. No. 2892098	▇▇▇ ▇▇▇ ▇▇▇▇▇▇ ▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

Meadowlands Fire Protection Corp. (New Jersey Corporation) Org. No. 0100215829	▇▇▇ ▇▇▇ ▇▇▇▇▇▇ ▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

▇▇▇▇▇ & Black Mechanical, Inc. (Delaware Corporation) Org. No. 0100076108	▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

North Jersey Mechanical Contractors, Inc. (New Jersey Corporation) Org. No. 0100076108	▇ ▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇▇ ▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Columns 2 & 3

▇▇▇▇▇▇▇▇▇ & Son, L.P. (Texas Limited Partnership) Org. No. 002169710	▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇▇▇▇▇▇▇▇ & Son, L.P. Detroit Fire Protection ▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇ & Son, L.P. South Bend Mechanical ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇ ▇▇▇▇. ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	See Columns 2 & 3

		▇▇▇▇▇▇▇▇▇ & Son, L.P. ▇▇ ▇▇▇▇▇ Division ▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ Advanced Systems Computer Consultants ▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇

		Advanced Systems Group, Inc.

A-12


Name of Debtor (And Organizational No.)	Chief Executive Office	Additional Places of Business	Location of Collateral Held by Debtor
		▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇ & Son, L.P. Lafayette Electric Division ▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇ & Son, ▇.▇. ▇▇▇▇▇▇ Fire Protection ▇▇▇ ▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ d/b/a Pace Mechanical Services ▇▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇. ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇

		▇▇▇▇▇▇▇▇▇ & Son, L.P. Indianapolis Electric Division ▇▇▇▇ ▇. ▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ d/b/a Havel Brothers ▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇. ▇▇▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇ d/b/a ▇▇▇▇▇ Brothers ▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇

		d/b/a ▇▇▇▇▇ Brothers ▇▇▇▇ ▇ ▇▇^▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇ & Son, L.P. South Bend Fire Protection ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇ ▇▇▇▇. ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇

A-13


Name of Debtor (And Organizational No.)	Chief Executive Office	Additional Places of Business	Location of Collateral Held by Debtor

		▇▇▇▇▇▇▇▇▇ & Son, L.P. ▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇ d/b/a ▇▇▇▇▇ Brothers ▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇▇▇▇ ▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇

The ▇▇▇▇▇ Company (Kansas Corporation) Org. No. 630954	▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇ ▇. ▇▇▇ ▇▇▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇	See Columns 2 & 3

▇▇▇▇▇▇-J-▇▇▇▇▇▇, Inc. (Tennessee Corporation) Org. No. 0033339	▇▇▇▇ ▇. ▇▇▇▇▇▇ ▇▇. #▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

EMCOR Government Services, Inc. (Maryland Corporation) Org. No. D03903283	▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇., ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

EMCOR Services Arizona, Inc. (Delaware Corporation) Org. No. 4550552	▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇., ▇▇▇▇▇ ▇▇ ▇▇▇▇▇▇▇, ▇▇▇▇▇▇▇ ▇▇▇▇▇		See Column 2

Aircond Corporation (Georgia Corporation) Org No. J202485	▇▇▇ ▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇, ▇.▇. ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇, ▇▇▇▇▇ ▇ ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇-▇▇▇▇	See Columns 2 & 3

A-14


Name of Debtor (And Organizational No.)	Chief Executive Office	Additional Places of Business	Location of Collateral Held by Debtor

		▇▇▇ ▇▇▇ ▇▇▇▇ ▇▇▇▇, ▇▇▇▇▇ ▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇, ▇▇▇▇▇ ▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇

The Betlem Service Corporation (New York Corporation) Org. No. None	▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Columns 2 & 3

CES Facilities Management Services, Inc. (Maryland Corporation) Org. No. D05515994	▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇, ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

Combustioneer Corporation (Maryland Corporation) Org. No. D03050507	▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

EMCOR Services Team Mechanical, Inc. (Delaware Corporation) Org No. 4026937	▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

New England Mechanical Services of Massachusetts, Inc. (Massachusetts Corporation) Org. No. None	▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

New England Mechanical Services, Inc. (Connecticut Corporation) Org. No. 0033131	▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ 3 ▇▇▇▇’▇ ▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	See Columns 2 & 3

A-15


Name of Debtor (And Organizational No.)	Chief Executive Office	Additional Places of Business	Location of Collateral Held by Debtor

		▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇

Trimech Plumbing L.L.C. (Delaware Limited Liability Corp.) Org. No. 3463843	▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

▇▇▇▇ Services, Inc. (Ohio Corporation) Org. No. 470852	▇▇ ▇. ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇	See Columns 2 & 3

F & G Management, Inc. (Delaware Corporation) Org. No. 3581028	▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

FR X ▇▇▇▇▇▇▇▇ Acquisitions Co. (Delaware Corporation) Org. No. 4168905	▇▇▇ ▇▇▇▇ ▇▇. ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

HNT Holdings Inc. (Delaware Corporation) Org. No. 3372290	▇▇▇ ▇▇▇▇ ▇▇. ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

Ohmstede Partners LLC (Delaware LLC) Org. No. 3388080	▇▇▇ ▇▇▇▇ ▇▇. ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

Ohmstede Holdings LLC (Delaware LLC) Org. No. 3388083	▇▇▇ ▇▇▇▇ ▇▇. ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

Ohmstede Ltd. (Texas Limited Partnership) Org. No. 00151033-10	▇▇▇ ▇▇▇▇ ▇▇. ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇▇ ▇. ▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇ ▇▇. ▇▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇ ▇▇. ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	See Columns 2 & 3

A-16


Name of Debtor (And Organizational No.)	Chief Executive Office	Additional Places of Business	Location of Collateral Held by Debtor
		▇▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇ ▇▇. ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇

▇▇▇▇▇▇▇▇ Industrial Services Inc. (Texas Corporation) Org. No. 117921700	▇▇▇ ▇▇▇▇ ▇▇. ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

Beaumont Real Estate Holding Company (Texas Corporation) Org. No. 800104306	▇▇▇ ▇▇▇▇ ▇▇. ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

Performance Mechanical, Inc. (California Corporation) Org. No. C1186280	▇▇▇ ▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

▇▇▇▇▇▇ Equipment & Manufacturing Company (California Corporation) Org. No. C0431393	▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇-▇▇▇▇		See Column 2

Professional Mechanical Contractors, L.L.C. (Connecticut Corporation) Org. No. 0516430	▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

Mechanical Services of Central Florida, Inc. (Florida Corporation) Document No. P03000008527	▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇. ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

MOR PPM, Inc. (South Carolina Company) Org No. None	▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

L.T. Mechanical, Inc. (North Carolina Corporation) Org. No. 0649719	▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇		See Column 2

▇▇▇▇▇▇▇ Holdings, Inc. (North Carolina Corporation) Org. No. 0800684	▇▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇. ▇▇▇▇▇▇▇-▇▇▇▇▇, ▇▇ ▇▇▇▇▇

▇▇▇▇▇▇▇, Inc. (North Carolina Corporation) Org. No. 0287987	▇▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇. ▇▇▇▇▇▇▇-▇▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇

A-17


Name of Debtor (And Organizational No.)	Chief Executive Office	Additional Places of Business	Location of Collateral Held by Debtor

▇▇▇▇▇▇▇ Environmental Specialties, LLC	▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇
(North Carolina limited liability company)
Org. no. 0571969

Mechanical Specialties Contractors, Inc. (North Carolina Corporation)	▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇ ▇ ▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇▇▇ ▇▇▇▇▇▇ ▇▇. ▇▇▇▇▇ ▇ ▇▇▇▇▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇
Org. No. 0406593

Intermech, Inc. (Delaware Corporation) Org. No. 0894383	▇▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇. ▇▇▇▇▇▇▇-▇▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇ ▇▇. ▇▇▇▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇ ▇▇▇. ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇

▇▇▇▇▇ ▇▇▇▇▇▇ & Associates, Inc. (Florida Corporation) Org. No. 238126	▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇. ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇ ▇▇. ▇ ▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇. ▇▇▇ ▇▇▇. ▇▇▇▇▇ ▇▇. ▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇ 3250

USM Services Holdings, Inc. (Delaware Corporation) Org. No. 4927170	▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇. ▇▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇

USM (Delaware) Inc. (Delaware Corporation) Org. No. 4435782	▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇. ▇▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇

USM, Inc. (Pennsylvania Corporation) Org. No. 1048528	▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇. ▇▇▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇	▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇ ▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇

A-18

Schedule B

Trade Names


Debtor’s Name	Prior Legal Name in Past 5 Years	Trade Names/Names in Past 5 Years

EMCOR Group, Inc.	None	None

EMCOR Construction Services, Inc.	EMCOR Construction Holding Services, Inc. (DE)	None
	EMCOR Mechanical/Electrical Services (Midwest), Inc.; EMCOR Mechanical/Electrical Services (South), Inc.; EMCOR Mechanical/Electrical Services (West), Inc. - each in DE

EMCOR Facilities Services, Inc.	None	EMCOR Energy Services
		EMCOR Industrial Services Consulting Group
		Efacilities
		Chicago Fire Protection Group
		Facilities Knowledge Center (with respect to the Phoenix, AZ property)
		EMCOR Customer Solutions Center
		EMCOR Mobile Services
		EMCOR Mechanical Services
		EMCOR Services

Mesa Energy Systems, Inc.	None	EMCOR Services Integrated Solutions
		EMCOR Service VSD
		EMCOR Services
		▇▇▇▇▇▇ Air Conditioning
		EMCOR Services ARC
		EMCOR Services ▇▇▇▇▇▇ (re
		the Lemon Grove, CA property)
		EMCOR Service ▇▇▇▇▇▇ Air
		EMCOR Services Mesa
		Hillcrest Air Conditioning
		Hillcrest Sheet Metal
		EMCOR Service Mesa
		EMCOR Services Nevada


Debtor’s Name	Prior Legal Name in Past 5 Years	Trade Names/Names in Past 5 Years

EMCOR International Inc.	None	None

EMCOR Mechanical/ Electrical Services (East), Inc.	None	None

EMCOR Energy Services, Inc.	EMCOR Energy & Technologies, Inc. (DE)	EMCOR Energy EMCOR Energy Services
	▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇ Associates (CA)	EMCOR Telecom EMCOR Technologies

Heritage Mechanical Services, Inc.	Heritage ▇▇▇▇▇▇▇ Mechanical Services, Inc. (NY)	EMCOR Service Heritage Air Systems
		Heritage Air Systems
		Heritage Mechanical Services

Welsbach Electric Corp.	None	Tech Serv Broadway Maintenance ▇▇▇▇▇▇ Signs AZCO Modular Structures

Forest Electric Corp.	None	Forest Datacom Services

Welsbach Electric Corp. of L.I.	None	Broadway Maintenance Forest/Welsbach Technical Services

Penguin Maintenance and Services Inc.	None	Broadway Electrical Maintenance

Penguin Air Conditioning Corp.	None	Penguin Broadway Electrical Maintenance
		EMCOR Service Penguin Air Penguin Broadway Maintenace & Service

▇. ▇. ▇▇▇▇▇▇▇ Corp.	None	▇▇▇▇▇▇ Mechanical
		EMCOR Service ▇▇▇▇▇▇ Mechanical
		▇.▇. ▇▇▇▇▇▇▇
		▇.▇. ▇▇▇▇▇▇▇ Service Company
		▇▇▇▇▇-▇▇▇▇▇▇▇▇▇▇

▇▇▇▇▇ Mechanical Corp.	None	▇▇▇▇▇ Mechanical

EMCOR ▇▇▇▇ Electric Co. of Indiana, Inc.	JWP/▇▇▇▇ Electric Co. of Indiana, Inc.	JWP Electrical Services Co. of Ohio

B-2


Debtor’s Name	Prior Legal Name in Past 5 Years	Trade Names/Names in Past 5 Years

	(DE)	JWP ▇▇▇▇ Electric of Ohio
		JWP/▇▇▇▇ Electric of Ohio

▇▇▇▇▇▇ Electric Co., Inc.	None	EMCOR Technologies
		▇▇▇▇▇▇ Electric and Technologies
		Communication and Data Services
		▇▇▇▇▇▇ Electric & Technology Solutions

University Mechanical & Engineering Contractors, Inc. (California Corporation)	None	Spira-Loc University Industrial Services

Pace Mechanical Services II, Inc.	Pace Mechanical Services, Inc.	EMCOR Service Pace Mechanical
		EMCOR Pace Mechanical Services, Inc. Pace Mechanical Services

University Mechanical & Engineering Contractors, Inc. (Arizona Corporation)	None	None

▇▇▇▇▇▇ Mechanical Contractors, Inc.	None	None

Design Air, Limited	None	None

▇▇▇▇▇▇▇▇ & ▇▇▇▇▇▇, Inc.	None	None

EMCOR ▇▇▇▇▇, Inc.	None	▇▇▇▇▇, Inc.
		The ▇▇▇▇▇▇ Company
		Gowco
		Gowco, Inc.
		Systems Commissioning
		Gowan Sheet Metal Gowan Sheet Metal, Inc.
		EMCOR Service Gowan
		EMCOR Service ▇▇▇▇▇, Inc.

Inte-Fac Corp.	None	None

MES Holdings Corporation	None	None

▇. ▇. ▇▇▇▇▇▇▇▇ & Company, Inc.	None	None

Labov Mechanical, Inc.	None	Labov Mechanical Contractors
		EMCOR Services Labov

B-3


Debtor’s Name	Prior Legal Name in Past 5 Years	Trade Names/Names in Past 5 Years

		EMCOR Service Labov EMCOR Services Labov Mechanical EMCOR Services Fluidics Labov

Labov Plumbing, Inc.	None	None

Dynalectric Company of Ohio	None	None

Dynalectric of Michigan II, Inc.	Dynalectric of Michigan, Inc.	▇▇▇▇ ▇▇▇▇▇▇ Electric & Technologies
		Dynalectric Michigan

▇▇▇▇▇-▇▇▇▇▇▇▇ Inc.	The ▇▇▇▇ ▇. ▇▇▇▇▇ Co.	▇▇▇▇▇ ▇▇▇▇▇▇▇
		EMCOR Service ▇▇▇▇▇- ▇▇▇▇▇▇▇
		EMCOR Service Automated Controls
		Dynalectric Ohio

▇▇▇▇▇▇▇▇ Mechanical Co., Inc.	None	Control Systems Specialist
		University ▇▇▇▇▇▇▇▇ Mechanical

Dynalectric Company	None	Dynatran
		▇▇▇▇▇▇▇▇ Dynalectric of Colorado
		Wasatch Wasatch Electric
		Dynalectric Information Technologies
		Dynalectric Service & Systems Group
		EMCOR Construction Services
		Dynatechnologies

DYN Specialty Contracting, Inc.	None	None

KDC Inc.	None	KDC Systems
		Dynalectric IDMA

Contra Costa Electric, Inc.	None	None

Dynalectric Company of Nevada	None	None

EMCOR Services Northeast, Inc.	Balco, Inc. (MA)	EMCOR Services Balco/ ▇.▇. ▇▇▇▇▇▇▇
	Commonwealth Air Conditioning and	EMCOR Services CommAir

B-4


Debtor’s Name	Prior Legal Name in Past 5 Years	Trade Names/Names in Past 5 Years

	Heating, Inc. (MA)	EMCOR Services CommAir/Balco
		EMCOR Services Northeast Balco/▇.▇. ▇▇▇▇▇▇▇
		EMCOR Services Northeast CommAir
		EMCOR Services Northeast ▇▇▇▇▇▇▇ ▇▇▇▇▇ EMCOR Services Balco

Building Technology Engineers, Inc.	None	BTE (Massachusetts), Inc.

		BTE of Massachusetts
		Building Operations Technologies of Mass
		Building Technology, Inc.
		Building Technology

▇▇▇▇▇ & Kent Company of Florida	None	None

Monumental Investment Corporation	None	None

The ▇▇▇▇▇ and ▇▇▇▇ Corporation	None	▇▇▇▇▇ Mechanical EMCOR Services ▇▇▇▇▇ and ▇▇▇▇
		▇▇▇▇▇ and ▇▇▇▇ Construction Services
The ▇▇▇▇▇ and Kent Company	None	EMCOR Service ▇▇▇▇▇ and ▇▇▇▇
		EMCOR Service ▇▇▇▇▇ and Kent Northern Operations
		EMCOR Service ▇▇▇▇▇ and ▇▇▇▇ Southern Operations
		The ▇▇▇▇▇ and Kent Company of Maryland

▇. ▇. ▇▇▇▇▇▇▇▇ Co., Inc.	None	None

Air Systems, Inc.	Air Systems Acquisition, Inc.	EMCOR Services Air Systems
	San ▇▇▇▇ Air Systems, Inc.	EMCOR Services

Fluidics, Inc.	Wredna, Inc. (DE) and QLR Corporation (DE)	EMCOR Services Fluidics

B-5


Debtor’s Name	Prior Legal Name in Past 5 Years	Trade Names/Names in Past 5 Years

University ▇▇▇▇▇▇▇▇ Mechanical Co., Inc.	None	None

Midland Fire Protection, Inc.	None	None

▇▇▇▇▇ and Kent-Connecticut, Inc.	Environmental Engineering Company (MD)	None

	▇▇▇▇▇ and ▇▇▇▇ Distributors, Inc. (MD)

▇▇▇▇▇ and Kent - New England, Inc.	None	None

Monumental Heating, Ventilating and Air Conditioning Contractors, Inc.	None	None

Forti/▇▇▇▇▇ and ▇▇▇▇, LLC	None	None

HVAC, Ltd.	None	None

Atlantic Coast Mechanical, Inc.	None	None

Great Monument Construction Company	None	None

EMCOR-CSI Holding Co.	None	None

Border Electric Co., L.P.	None	None

Border Mechanical Co., L.P.	None	None

Central Mechanical Construction Co., Inc.	None	None.

CS48 Acquisition Corp.	None	None

CSUSA Holdings L.L.C.	None	None

F & G Mechanical Corporation	None	EMCOR Services F & G Mechanical

F & G Plumbing, Inc.	None	None

B-6


Debtor’s Name	Prior Legal Name in Past 5 Years	Trade Names/Names in Past 5 Years

EMCOR Services New York/ New Jersey, Inc.	Gotham Air Conditioning Service, Inc. (DE)	EMCOR Services Gotham Air
EMCOR Services New York/ New Jersey, Inc.	Gotham Air Conditioning Service, Inc. (DE)	Gotham Air Conditioning Services

	Trimech Corporation (NJ)	EMCOR Services Trimech

Hillcrest Sheet Metal, Inc.	None	Healthy Air Ducts
		Hillcrest Air Conditioning EMCOR Services Hillcrest
▇▇▇▇▇▇▇▇▇▇▇-▇▇▇▇▇▇▇ Mechanical, Inc.	Kilgust Mechanical, Inc.	▇▇▇▇▇▇▇▇▇▇▇-▇▇▇▇▇▇▇ Mechanical
		EMCOR Services Integrated Solutions

▇▇▇▇▇▇▇ Service, Inc.	None	EMCOR Service ▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇

▇▇▇▇▇▇ Electric Company, Inc.	None	None

▇▇▇▇▇▇▇ Mechanical Corporation	None	Heritage ▇▇▇▇▇▇▇ Heritage Mechanical

Maximum Refrigeration & Air Conditioning Corp.	None	None

Meadowlands Fire Protection Corp.	None	None

▇▇▇▇▇ & Black Mechanical, Inc.	None	EMCOR Services ▇▇▇▇▇ & Black

North Jersey Mechanical Contractors, Inc.	None	NJM Service North Jersey Maximum Mechanical

▇▇▇▇▇▇▇▇▇ & Son, L.P.	None	▇▇▇▇▇ Brothers
		▇▇ ▇▇▇▇▇
		Guardian Fire Protection
		Acoustics
		Advanced Systems Group
		Advanced Systems

B-7


Debtor’s Name	Prior Legal Name in Past 5 Years	Trade Names/Names in Past 5 Years

		Computer Consultants
		Chicago Fire Protection Acoustics
		▇▇▇▇▇ Guardian Fire Protection Systems Pace Mechanical Services EMCOR Facility Services EMCOR Construction Services ▇▇▇▇▇▇▇▇▇ Fire Protection Dynalectric Michigan Advanced Systems Computer Consulting

The ▇▇▇▇▇ Company	None	KC Fab
		▇▇▇▇▇ Supermarket Refrigeration

▇▇▇▇▇▇-J-▇▇▇▇▇▇, Inc.	None	EMCOR Service ▇▇▇▇▇▇
		EMCOR Services ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇
		EMCOR Services Integrated Solutions

EMCOR Government Services, Inc.	Consolidated Engineering Services, Inc. (MD)	Consolidated Services, Inc. EMCOR Services Consolidated Services of Maryland, Inc.
		Consolidated Engineering Services, Inc.
		Consolidated Engineering Services

Aircond Corporation	None	EMCOR Services Aircond EMCOR Services Integrated Solutions EMCOR Service Integrated Services

The Betlem Service Corporation	None	EMCOR Services Betlem Residential
		EMCOR Services Betlem Home Energy
		Betlem Heating and Air Conditioning
		EMCOR Services Betlem Service
		EMCOR Services betlem

CES Facilities Management Services, Inc.	None	None

B-8


Debtor’s Name	Prior Legal Name in Past 5 Years	Trade Names/Names in Past 5 Years

Combustioneer Corporation	None	EMCOR Services Combustioneer
		EMCOR Services Mid-Atlantic

EMCOR Services Team Mechanical, Inc.	EMCOR Services Midwest, inc.	EMCOR Services ▇▇▇▇▇ Mechanical Midwesco Services EMCOR Midwesco Services Team Mechanical EMCOR Services Midwest

New England Mechanical Services of Massachusetts, Inc.	None	None

New England Mechanical Services, Inc.	None	NEMSI
New England Mechanical Services, Inc.		EMCOR Services New England Mechanical

Trimech Plumbing L.L.C.	None	None

▇▇▇▇ Services, Inc.	None	None
F & G Management, Inc.	None	None

FR X ▇▇▇▇▇▇▇▇ Acquisitions Co.	None	None

Ohmstede Partners LLC	None	None

Beaumont Real Estate Holding Company	None	None

HNT Holdings Inc.	None	None

▇▇▇▇▇▇▇▇ Industrial Services Inc.	Hydraulic Extractor Services, Inc.	United Industrial Services- Beaumont
		Ohmstede United Industrial Services Divison
		Elite Project Planning

Ohmstede Holdings LLC	None	None


▇▇▇▇▇▇▇▇ Ltd.	Ohmstede ▇▇	▇▇▇▇▇▇▇▇ Ltd., ▇▇ ▇▇▇▇▇▇▇▇ Ltd., Limited Partnership

Performance Mechanical, Inc.	None	None

▇▇▇▇▇▇ Equipment and Manufacturing Company	None	None

B-9


Debtor’s Name	Prior Legal Name in Past 5 Years	Trade Names/Names in Past 5 Years

Professional Mechanical Contractors, LLC	None	None

Mechanical Services of Central Florida, Inc.	None	EMCOR Services Integrated Solutions of Florida EMCOR Services MSI – Mechanical Services

MOR PPM, Inc. L.T. Mechanical, Inc.	None None	PPM EMCOR Services L.T. Mechanical
EMCOR Services Arizona, Inc.	None	None

USM, Inc.	Tower Clearing Systems, Inc.

	US Maintenance Inc.

▇▇▇▇▇▇▇, Inc.	Luwa, Inc.

▇▇▇▇▇▇▇ Environmental Specialties, LLC	Luwa Environmental Specialties

B-10

SCHEDULE C
INTELLECTUAL PROPERTY

Trademarks and Trademark Applications: EMCOR Group, Inc.

TRADEMARK

COUNTRY

STATUS

APP. NO.

FILED

REG. NO.

REGISTERED

Be There For Life

CANADA

PENDING

1,341,139

03/28/2007

Be There For Life

EUROPEAN UNION (CT)

PENDING

005835699

04/17/2007

Be There For Life

UNITED STATES

PENDING

77/027,226

10/23/2006

Design

EUROPEAN UNION (CT)

PENDING

004986816

03/30/2006

Design

SOUTH AFRICA

REGISTERED

2001/12319

7/17/2001

2001/12319

3/15/2006

Design

SOUTH AFRICA

PENDING

2001/12318

7/17/2001

Diamond Design

CANADA

REGISTERED

1,227,886

8/20/2004

662,032

3/31/2006

Diamond Design

CANADA

PENDING

1,296,603

04/04/2006

Diamond Design

UNITED STATES

REGISTERED

76/197,550

1/19/2001

2,563,476

4/23/2002

Drake & ▇▇▇▇▇

UNITED ARAB EMR

REGISTERED

48216

06/23/2002

35824

01/15/2003

Drake & ▇▇▇▇▇ International

UNITED ARAB EMR

REGISTERED

48215

06/23/2002

35823

01/15/2003

EFS

EUROPEAN UNION (CTM)

REGISTERED

002348464

8/22/2001

002348464

6/10/2003

EFS

SOUTH AFRICA

REGISTERED

2001/13770

8/10/2001

2001/13770

7/11/2006

EFS

UNITED KINGDOM

REGISTERED

2278738

8/23/2001

2278738

8/23/2001

EFS

UNITED STATES

REGISTERED

76/123,985

9/ 7/2000

2,940,330

4/12/2005

EFS - FACILITIES

SOUTH AFRICA

REGISTERED

2001/13772

8/10/2001

2001/13772

7/11/2006

EFS - FACILITIES

UNITED ARAB EMR

REGISTERED

44911

10/30/2001

35128

12/14/2002

EFS - FACILITIES

EUROPEAN UNION (CTM)

REGISTERED

002349108

8/22/2001

002349108

7/29/2003

EFS - FACILITIES

UNITED KINGDOM

REGISTERED

2278740

8/23/2001

2278740

8/23/2001

EFS - FACILITIES

SOUTH AFRICA

REGISTERED

2001/13771

8/10/2001

2001/13771

7/11/2006

EMCOR

CANADA

REGISTERED

1,227,764

8/20/2004

651,736

10/25/2005

EMCOR

CANADA

REGISTERED

1,296,682

4/04/2006

690,311

06/20/2007

EMCOR

EUROPEAN UNION (CT)

PENDING

004986857

3/30/2006

EMCOR

UNITED ARAB EMR

REGISTERED

66590

1/18/2005

54490

07/19/2005

EMCOR & Design

CANADA

PENDING

1,296,605

4/4/2006

EMCOR & Design

EUROPEAN UNION (CT)

PENDING

004986733

3/30/2006

EMCOR & Design

UNITED STATES

REGISTERED

75/895,899

1/12/2000

2,562,923

4/23/2002

EMCOR SERVICE

UNITED STATES

REGISTERED

75/895,801

1/12/2000

2,575,099

6/ 4/2002

EMCOR. TAKING KIDSAFETY TO THE STREET

CANADA

REGISTERED

1,295,595

3/28/2006

692378

7/19/2007

EMCOR. TAKING KIDSAFETY TO THE STREET

EUROPEAN UNION (CT)

PENDING

004987012

3/30/2006

C-1

TRADEMARK

COUNTRY

STATUS

APP. NO.

FILED

REG. NO.

REGISTERED

EMCOR. TAKING
KIDSAFETY TO THE STREET

UNITED STATES

REGISTERED

78/704,379

8/31/2005

3,202,939

1/23/2007

FACILITIES EDGE

EUROPEAN UNION (CTM)

REGISTERED

002361426

9/ 3/2001

002361426

7/29/2003

FACILITIES EDGE

UNITED ARAB EMR

REGISTERED

44904

10/30/2001

35083

12/10/2002

FACILITIES EDGE

UNITED STATES

REGISTERED

76/308,780

9/ 4/2001

2,751,080

8/12/2003

FACILITIES EDGE

SOUTH AFRICA

REGISTERED

2001/14991

8/29/2001

2001/14991

3/29/2006

FACILITIES EDGE

SOUTH AFRICA

REGISTERED

2001/14992

8/29/2001

2001/14992

3/29/2006

FACILITIES EDGE

SOUTH AFRICA

REGISTERED

2001/14993

8/29/2001

2001/14993

3/29/2006

FACILITIES SERVICES TO THE POWER OF E

EUROPEAN UNION (CTM)

REGISTERED

002347367

8/22/2001

002347367

7/29/2003

FACILITIES SERVICES TO THE POWER OF E

UNITED KINGDOM

REGISTERED

2278742

8/23/2001

2278742

8/23/2001

FACILITIES SERVICES TO THE POWER OF E

SOUTH AFRICA

REGISTERED

2001/13774

8/10/2001

2001/13774

3/15/2006

FACILITIES SERVICES TO THE POWER OF E

UNITED STATES

PENDING

76/296,634

8/ 8/2001

FE (stylized)

UNITED STATES

REGISTERED

76/297,396

8/ 8/2001

2,753,922

8/19/2003

FE (stylized)

UNITED KINGDOM

REGISTERED

2278750

8/23/2001

2278750

8/23/2001

FE (stylized)

SOUTH AFRICA

REGISTERED

2001/14231

8/17/2001

2001/14231

11/10/2006

FE (stylized)

EUROPEAN UNION (CTM)

REGISTERED

002348597

8/22/2001

002348597

7/29/2003

KNOWLEDGE IN ACTION

SOUTH AFRICA

REGISTERED

2001/12275

7/16/2001

2001/12275

12/12/2005

KNOWLEDGE IN ACTION

UNITED STATES

REGISTERED

76/197,324

1/19/2001

2,648,390

11/12/2002

KNOWLEDGE IN ACTION

OMAN

REGISTERED

25925

7/17/2001

25925

9/21/2005

KNOWLEDGE IN ACTION

OMAN

REGISTERED

25924

7/17/2001

25924

9/21/2005

KNOWLEDGE IN ACTION

EUROPEAN UNION (CTM)

REGISTERED

002302230

7/16/2001

002302230

12/15/2003

THE POWER OF E

EUROPEAN UNION (CTM)

REGISTERED

002347656

8/22/2001

002347656

7/29/2003

THE POWER OF E

UNITED KINGDOM

REGISTERED

2278743

8/23/2001

2278743

8/23/2001

THE POWER OF E

SOUTH AFRICA

REGISTERED

2001/13773

8/10/2001

2001/13773

3/15/2006

Trademarks and Trademark Applications: CES Facilities Management Services

TRADEMARK

COUNTRY

STATUS

APP. NO.

FILED

REG. NO.

REGISTERED

CES

UNITED STATES

REGISTERED

76,087,071

7/11/2000

2,583,464

6/18/2002

Trademarks and Trademark Applications: Fluidics, Inc.

TRADEMARK

COUNTRY

STATUS

APP. NO.

FILED

REG. NO.

REGISTERED

F & Design

CANADA

REGISTERED

745047

1/12/1994

455,787

3/22/1996

F & Design

UNITED STATES

REGISTERED

74/413,681

7/16/1993

1,895,331

5/23/1995

FLUIDICS

CANADA

REGISTERED

745063

1/12/1994

447,654

9/15/1995

C-2

TRADEMARK

COUNTRY

STATUS

APP. NO.

FILED

REG. NO.

REGISTERED

FLUIDICS

UNITED STATES

REGISTERED

75/975,919

7/16/1993

2,086,132

8/15/1997

FLUIDICS

UNITED STATES

REGISTERED

74/413,680

7/16/1993

2,085,139

8/5/1997

No other Debtor owns any intellectual property rights.

C-3

SCHEDULE D

INVESTMENT PROPERTY


INVESTMENTS		AMOUNT OF INVESTMENT	PAYEE OR HOLDER


1.	Colony Holdings Ltd. (Bermuda)	60,000 shares —12% interest	Monumental Investment Corp.
2.	Baltimore Ravens	License (right) for 16 seats	The ▇▇▇▇▇ & Kent Corporation

3.	T.P.C. of Boston	$35,000 investment in country club membership	▇. ▇. ▇▇▇▇▇▇▇ Corp.

4.	Cash Surrender Value of split dollar insurance policy	$1,229,000	Penguin Air Condition Corp.

5.	Cash Surrender Value of split dollar life insurance policy	$709,000	▇▇▇▇▇▇▇▇▇ & Son, LP

6. F & G Mechanical Inc. (New York)		90 shares – 45% interest	F&G Mechanical Corp.

7. C & H Services LLC		50% Interest	▇▇▇▇▇▇▇▇ Ltd.

SCHEDULE E

DEPOSIT ACCOUNTS

Deposit Accounts are set forth in the Side Letter.

- 1 -

SCHEDULE F

COMMERCIAL TORT CLAIMS

NONE

- 2 -

First Supplement to Security Agreement

Document Metadata

Document Metadata

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