FIRST AMENDMENT TO
AMENDED AND RESTATED LEASE AGREEMENT

This First Amendment to Amended and Restated Lease Agreement (the “First
Amendment”) is entered into effective April 1, 2007 between Raptor Master,
L.L.C., an Oklahoma limited liability company (the “Landlord”) and Climate
Master, Inc., a Delaware corporation (the “Tenant”).

WITNESSTH:

WHEREAS, Tenant and Landlord entered into that certain Amended and Restated
Lease Agreement dated as of May 8, 2001 (the “Agreement”); and

WHEREAS, Tenant and Landlord desires to amend the Agreement as provided in this
First Amendment.

NOW THEREFORE, in consideration of the mutual covenants and agreements set forth
in this First Amendment, and for other good and valuable consideration, the
receipt and sufficiency of which is hereby acknowledged, Landlord and Tenant
agree as follows:

1. The foregoing recitals are incorporated as a part of this First
Amendment.  All terms defined in the Agreement shall have the same meaning in
this First Amendment as are set forth in the Agreement, unless defined
differently in this First Amendment.

2. The provisions of Section 3.1 of the Agreement are deleted in their entirety
and replaced with the following language:

 
“3.1  Base Rent.  The Tenant agrees to pay to the Landlord throughout the
primary term of this Agreement a Base Rent, payable in equal monthly
installments of Fifty-Two Thousand Five Hundred Eighty-Three and 72/100 Dollars
($52,583.72) each, payable in advance and without demand beginning on April 1,
2007 and continuing thereafter on the first day of each month throughout the
primary term.  Landlord and Tenant acknowledge and agree that all amounts due
from Tenant to Landlord under the Agreement through and including April 1, 2007
have been fully and timely paid by Tenant.”

3. The provisions of Section 14.1 of the Agreement is amended by adding the
following language at the end of Section 14.1:

 
“Landlord will not take any action or fail to take any action that would have
the effect of increasing the amount of the First Fee Mortgage at any time, and
Landlord will continue to timely pay the debt service under the First Fee
Mortgage.  Landlord represents and warrants that the total monthly payment of
principal and interest under the First Fee Mortgage is $51,583.72.”

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4. The provisions of Section 16.1 of the Agreement are deleted in their entirety
and replaced with the following language:

 
“16.1  Purchase Option.  Provided that this Agreement is then in effect and no
Event of Default has occurred and is continuing, the Tenant is hereby granted
the continuing option to purchase the Premises on the terms and conditions of
the Option Agreement executed by Landlord and Tenant dated as of May 8, 2001, as
amended by the First Amendment to Option Agreement executed by Landlord and
Tenant dated as of April 1, 2007, the terms of which are incorporated herein.”

5. The provisions of Section 17.1.1 of the Agreement are deleted in their
entirety and replaced with the following language:

 
“17.1.1  Base Rent.  Notwithstanding the terms of Section 3.1 of this Agreement,
and assuming the Tenant’s exercise of the foregoing options, the Base Rent for
the extension periods will be as follows:  (a)  Beginning on the first day of
the first extension period and for each month during such term and any
subsequent extended term, monthly installments in the amount of Fifty-Two
Thousand Five Hundred Eighty-Three and 72/100 ($52,583.72) each, payable in
advance and without demand.”

6. The provisions of Section 19.1.4 of the Agreement are deleted in their
entirety and replaced with the following language:

 
“19.1.4  Building.  The 230,000 square feet of warehouse space, related office
space and facilities located on the Land.”

7. The provisions of Section 19.1.9 of the Agreement are deleted in their
entirety and replaced with the following language:

 
“19.1.9  First Fee Mortgage.  The Mortgage dated as of April 30, 2001 from
Landlord to Gold Bank, as amended by the First Amended and Restated Mortgage
dated as of January 17, 2002 from Landlord to Gold Bank, covering the Land, the
Building, and the Improvements, as well as all increases, renewals,
modifications, consolidations, replacements and extensions thereof which may be
consented to in advance by Tenant in writing.  Tenant hereby provides written
consent to the First Amended and Restated Mortgage dated as of January 17, 2002
from Landlord to Gold Bank as if such consent were provided contemporaneously
with the execution of such amendment.”

8. Except as modified in this First Amendment, the Agreement shall remain in
full force and effect.

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IN WITNESS WHEREOF, this First Amendments is executed to be effective the day
and year first above written.

RAPTOR MASTER,
L.L.C.                                                                          CLIMATE
MASTER, INC.

By:  Raptor Properties, L.L.C, Manager
By:  JRB Investments, Inc.,
Manager                                                        By:__________________________
Name:__________________________
Title:__________________________
By:
__________________________                                                                
Name: __________________________                                                               
Title:   __________________________                                                             

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