American DG Energy Inc (NYSE MKT LLC:ADGE)

American DG Energy, Inc. distributes, owns and operates clean, on-site energy systems that produce electricity, heat, hot water and cooling to commercial, institutional and industrial customers. The company offers natural gas powered cogeneration systems that are reliable and energy efficient. Its cogeneration systems produce electricity from an internal combustion engine driving a generator, while the heat from the engine and exhaust is recovered and typically used to produce heat and hot water for use at the site. It also distribute and operate water chiller systems for building cooling applications that operate in a similar manner, except that the engine's power drives a large air-conditioning compressor while recovering heat for hot water. Cogeneration systems reduce the amount of electricity that the customer must purchase from the local utility and produce valuable heat and hot water for the site to use as required. The company was founded by George N. Hatsopoulos and John N. Hatsopoulos in 2001 and is headquartered in Waltham, WA.