American DG Energy Elects New Board Member

                  American DG Energy Elects New Board Member

PR Newswire

WALTHAM, Mass., Oct. 22, 2013

WALTHAM, Mass., Oct. 22, 2013 /PRNewswire/ -- American DG Energy Inc. (NYSE
MKT: ADGE), a leading On-Site Utility, offering clean electricity, heat, hot
water and cooling solutions to hospitality, healthcare, housing and athletic
facilities, today announced that Mr. John Rowe, was elected to the Company's
Board of Directors.

John Rowe is Chairman Emeritus of Exelon Corporation, a utility holding
company which he has led since its formation in 2000. Mr. Rowe retired as
Chief Executive Officer of Exelon in March 2012. Exelon Corporation is the
nation's leading competitive energy provider, with approximately $23.5 billion
in annual revenues. Previous roles include chief executive officer positions
at New England Electric Systems and Central Maine Power Company. Mr. Rowe
served as general counsel of Consolidated Railroad and was a partner in the
law firm of Isham, Lincoln and Beale.

"This is exciting to welcome John as a new member of our Board of Directors.
His vast knowledge and experience in the utility industry will be a terrific
benefit to our Board of Directors and create additional value to our
shareholders," said John H. Hatsopoulos, Chief Executive Office of American DG
Energy.

On-Site Utility
American DG Energy sells the energy produced from an onsite energy system to
an individual property as an alternative to the outright sale of energy
equipment. On-Site Utility customers only pay for the energy produced by the
system and receive a guaranteed discount rate on the price of the energy. All
system capital, installation and operating expenses are paid by American DG
Energy.

About American DG Energy
American DG Energy supplies low-cost energy to its customers through
distributed power generating systems. The Company is committed to providing
institutional, commercial and small industrial facilities with clean, reliable
power, cooling, heat and hot water at lower costs than charged by local
utilities – without any capital or start-up costs to the energy user – through
its On-Site Utility energy solutions. American DG Energy is headquartered in
Waltham, Massachusetts. Learn more about how American DG Energy (NYSE MKT:
ADGE) reduces energy costs at www.americandg.com or follow us on Facebook and
Twitter.

FORWARD-LOOKING STATEMENTS
This press release contains forward-looking statements under the Private
Securities Litigation Reform Act of 1995 that involve a number of risks and
uncertainties. Important factors could cause actual results to differ
materially from those indicated by such forward-looking statements, as
disclosed on the Company's website and in Securities and Exchange Commission
filings. This press release does not constitute an offer to buy or sell
securities by the Company, its subsidiaries or any associated party and is
meant purely for informational purposes. The statements in this press release
are made as of the date of this press release, even if subsequently made
available by the Company on its website or otherwise. The Company does not
assume any obligation to update the forward-looking statements provided to
reflect events that occur or circumstances that exist after the date on which
they were made.

SOURCE American DG Energy Inc.

Website: http://www.americandg.com
Contact: Investor Contact: Jesse T. Herrick, American DG Energy Inc.,
781.522.6020, jesse.herrick@americandg.com, Media Contact: Barry J. Sanders,
American DG Energy Inc., 781.522.6010, barry.sanders@americandg.com