November 3, 2008

American DG Energy to Hold Earnings Conference Call on Monday, November 10, 2008

WALTHAM, Mass., Nov. 3 /PRNewswire-FirstCall/ -- American DG Energy Inc. (BULLETIN BOARD: ADGE) , a leading On-Site Utility offering clean electricity, heat, hot water and cooling to hospitality, healthcare, housing and athletic facilities, announced that it will release its financial results for the third quarter of 2008 on Monday, November 10, 2008, and will hold a conference call on the same day at 11:00 a.m. Eastern Time.

During the call, the company will discuss its third quarter financial performance. To listen, call (800) 8602442 within the U.S. or (412) 858-4600 outside the U.S. Participants should reference American DG Energy to access the call. Please begin dialing at least 10 minutes before the scheduled starting time. The earnings press release will be available on the Company web site at in the "Investors" section under "News Releases." The earnings call will be available for playback until Wednesday November 12, 2008. To listen to the playback, call (877) 3447529 within the U.S. or (412) 317-0088 outside the U.S. and use Playback Code 424845.

About American DG Energy

American DG Energy (BULLETIN BOARD: ADGE) 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. American DG Energy is headquartered in Waltham, Massachusetts. More information can be found at


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 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 web site 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.

American DG Energy Inc.

CONTACT: John Hatsopoulos of American DG Energy, +1-781-522-6020

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