Exhibit 99

                                                                          EXELON
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News Release

From:   Exelon Corporation                                For Immediate Release
        Corporate Communications                          ---------------------
        P.O. Box 805379                                   December 15, 2003
        Chicago, IL 60680-5379


Contact:   Kellie Szabo, 312.394.3071

  Exelon Corporation Announces Agreement to Sell Its Subsidiary, Exelon Thermal
              Technologies to Macquarie Bank Limited of Australia

CHICAGO (December 15, 2003) - Exelon Corporation, parent company of Exelon
Thermal Technologies, announced today that it has entered into an agreement to
sell Exelon Thermal to Macquarie Bank Limited of Australia for $135 million.
Exelon Thermal is an industry leader providing environmental-friendly cooling
solutions to facilities located in Chicago.

"This divestiture supports Exelon's corporate strategy to focus on our core
integrated utility businesses," said George Gilmore, Senior Vice President of
Exelon and President of Exelon Enterprises. "Exelon also believes this
transaction is in the best interest of Exelon Thermal. The buyer's knowledge of
the industry and enthusiasm for Exelon Thermal will provide the company with the
support needed to achieve its growth objectives."

The Chicago-based energy assets provide primarily chilled water to customers
from centralized plants, via underground piping, for cooling purposes. Customers
are typically office buildings that engage in long-term contracts for these
services.

The Macquarie group is a global leader in infrastructure acquisition, funding
and management, and manages about $10 billion of funds invested in
infrastructure assets and businesses around the world including toll roads,
airports, communications, water, rail and power assets. The Macquarie group has
been active in the United States for more than a decade and has over 200
employees in offices in Chicago, Houston, Los Angeles, Memphis, New York, San
Diego, San Jose and Seattle.

Advisors to Exelon on this transaction included Dresdner Kleinwort Wasserstein
and the law firm of Winston & Strawn. The agreement is subject to customary
closing conditions and approval from the City of Chicago. The transaction is
expected to close first quarter 2004.

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Exelon  Corporation  is one of the  nation's  largest  electric  utilities  with
approximately 5 million  customers and more than $15 billion in annual revenues.
The  company  has  one of  the  industry's  largest  portfolios  of  electricity
generation capacity, with a nationwide reach and strong positions in the Midwest
and  Mid-Atlantic.  Exelon  distributes  electricity to  approximately 5 million
customers in Illinois and Pennsylvania and gas to more than 440,000 customers in
the Philadelphia area. Exelon is headquartered in Chicago and trades on the NYSE
under the ticker EXC.