tecogen inc. operates in the distributed generation market and is a leading manufacturer of natural gas-fueled commercial cooling and heat-recovery systems. tecogen has an installed base of more than 1,100 units, which it supports through an established network of engineering, sales, and service suport. formerly a public subsidiary of thermo electron corporation, the company is now privately held. tecogen is based in waltham, massachusetts, with annual revenues of approximately $15 million.

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