TECOGEN, Inc. is a leading manufacturer of natural gas-fueled commercial cooling and heat-recovery systems sold under the product names TECOCHILL, TECOGEN cogeneration, TecoFROST.

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.