WALTHAM, Mass. – April 7, 2008 – American DG Energy Inc. (OTC.BB:ADGE) has launched a new brand image to inspire the connections between the emerging needs of the environment and the financial realities of property owners and managers. The campaign promotes the significant economic and environmental value of the Company’s On-Site Utility energy program with combined heat and power (CHP) systems. American DG Energy offers clean electricity, heat, hot water and cooling to hospitality, healthcare, housing and athletic facilities.

“Unfortunately, most sustainable energy options provide poor economics to customers,” stated Barry Sanders, president and COO of American DG Energy. “Our On-Site Utility provides immediate savings and real reduction in carbon production. We combine energy, environment and economics without any compromises. Our Company’s rapid growth is a testament that property owners agree. Our new brand image is an essential next step in the Company's strategy to increase its education and communications to the marketplace.”

American DG Energy created its new brand image to visually represent its business and convey the Company’s value proposition to a wider audience. The goal of the new brand image is to illustrate that American DG Energy can uniquely align environmental and financial benefits with on-site energy.