Owens Corning Selects Constellation to Develop 2.6-Megawatt Solar Project for Delmar N.Y. Facility

  Owens Corning Selects Constellation to Develop 2.6-Megawatt Solar Project
  for Delmar N.Y. Facility

    Project part of NY-Sun initiative for large-scale solar installations

Business Wire

DELMAR, N.Y. -- May 15, 2013

Owens Corning (NYSE: OC) and Constellation today announced the development of
a 2.6-megawatt (DC) solar generation project that will supply clean energy to
the company’s thermal and acoustical insulation plant in Delmar, N.Y.
Scheduled for completion in late 2013, the solar project is designed to supply
more than 6 percent of the plant’s annual electricity needs and will support
Owens Corning’s 2020 Environmental Footprint Goals for energy use and
greenhouse gas emissions reduction.

“The Delmar Plant is committed to environmental sustainability and advancing
both our plant and Owens Corning toward our 2020 sustainability goals,” said
John Becker, Delmar plant leader for Owens Corning. “In addition, this project
is part of our continuing efforts to implement innovative programs that
improve and protect New York State’s environment, and have a positive impact
on the state’s economy.”

Constellation will finance, build, own and maintain the system. Electricity
generated by the system will be purchased by Owens Corning under a 20-year
power purchase agreement with Constellation.

“Constellation is pleased to support Owens Corning’s commitment to renewable
energy,” said Michael D. Smith, vice president of solar and energy efficiency
sales for Constellation. "Solar as a power-generation source is an attractive
option for large-scale manufacturers like Owens Corning to achieve
environmental goals and manage electricity costs. We applaud the NY-Sun
Competitive Photovoltaic Program for creating public-private initiatives that
help spur the development of solar in New York.”

The project is supported in part through the New York State Energy Research
and Development Authority (NYSERDA) to develop and construct large-scale solar
projects in New York state under Gov. Andrew Cuomo’s New York Sun initiative.
In March 2013, Gov. Cuomo announced funding through the competitive program
which will help bring an additional 52 megawatts of solar capacity to the

"NYSERDA is pleased that this public-private partnership under Governor
Cuomo’s NY-Sun initiative will lead to one of the largest customer-sited solar
power projects in the state," said Francis J. Murray Jr., president and CEO,
NYSERDA. "This project demonstrates how the NY-Sun initiative is providing the
support needed to expand solar power across the state thereby reducing
business costs, stimulating economic activity and protecting the environment."

The solar power system will be composed of approximately 9,000 ground-mounted,
photovoltaic panels located on more than nine acres. The system is expected to
generate approximately 3.3 million kilowatt-hours of electricity per year.
Generating the same amount of electricity using nonrenewable sources would
result in the release of approximately 2,339 metric tons of carbon dioxide, or
the equivalent emissions from 487 passenger vehicles annually, according to
U.S. Environmental Protection Agency data for the region.

Constellation currently owns and operates more than 145 megawatts of solar
installations that have been completed or are under construction for
commercial and government customers throughout the United States. By
structuring its solar projects as power purchase agreements or solar services
agreements, Constellation offers solar installations that may require no
upfront capital from customers and may provide fixed power costs that are less
than projected market rates.

Constellation commercial customers, universities, school systems, hospitals
and government agencies interested in on-site solar installations of 1
megawatt or larger may contact Constellation at
sustainable-solutions@constellation.com or 1-877-427-2005.

About Owens Corning

Owens Corning (NYSE: OC) is a leading global producer of residential and
commercial building materials, glass-fiber reinforcements and engineered
materials for composite systems. A Fortune® 500 Company for 59 consecutive
years, Owens Corning is committed to driving sustainability by delivering
solutions, transforming markets and enhancing lives. Celebrating its 75th
anniversary in 2013, Owens Corning is a market-leading innovator of
glass-fiber technology with sales of $5.2 billion in 2012 and approximately
15,000 employees in 27 countries on five continents. Additional information is
available at www.owenscorning.com.

About Constellation

The Constellation family of retail electricity and natural gas suppliers
(www.constellation.com), are subsidiaries of Exelon Corp., and are leading
competitive retail suppliers of power, natural gas and energy products and
services for homes and businesses across the continentalUnited
States.Constellation’s retail businesses serve more than 100,000 business and
public sector customers, including more than two-thirds of the Fortune 100,
and nearly one million residential customers.

Exelon Corporation (NYSE: EXC) is the nation’s leading competitive energy
provider, with 2012 revenues of approximately $23.5 billion. Headquartered in
Chicago, Exelon has operations and business activities in 47 states, the
District of Columbia and Canada. Exelon is one of the largest competitive U.S.
power generators, with approximately 35,000 megawatts of owned capacity
comprising one of the nation’s cleanest and lowest-cost power generation
fleets. The company’s Constellation business unit provides energy products and
services to approximately 100,000 business and public sector customers and
approximately 1 million residential customers. Exelon’s utilities deliver
electricity and natural gas to more than 6.6 million customers in central
Maryland (BGE), northern Illinois (ComEd) and southeastern Pennsylvania

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Kelly Biemer, 410-470-9700
Owens Corning
Matt Schroder, 419-248-8987
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