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80 City Square Boston, MA 02129 O 617.912.9000 F 617.912.9001 www.mcgladrey.com
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September 17, 2014
Securities and Exchange Commission
Washington, D.C. 20549
Commissioners:
We have read American DG Energy Inc.'s statements included under Item 4.01 of its Form 8-K filed on September 17, 2014 and we agree with such statements concerning our firm.
/s/ McGladrey LLP
McGladrey LLP