TECOGEN SELECTED TO SUPPLY ALTERNATIVE SOURCE OF COOLING FOR BROOME COUNTY (NY) VETERANS MEMORIAL ARENA Tecogen's TECOCHILL to Make Ice During Hockey Season and Provide Space Conditioning During Summer Months WALTHAM, Mass., January 28, 2002 - Tecogen, a leading manufacturer of commercial and industrial natural gas-powered air-conditioners, has been selected to provide an alternative source of ice-making for hockey games in Broome County (NY) Veterans Memorial Arena. Tecogen's TECOCHILL® system also will be used during the summer months to provide space conditioning for the arena's many concerts and other special events. Tecogen's natural gas-powered chillers allow commercial and industrial customers to significantly reduce operating costs by 30 to 60 percent. "When it was time to update the arena's cooling equipment, we looked at systems that would enable us to lower the utility costs for the county's 7,200-seat arena," said Roger George of Johnson Controls, consulting engineers to the Broome County Veterans Memorial Arena. "Tecogen's chillers will reduce electric costs by using natural gas instead of electricity to cool the arena and chill the glycol used for the ice rink." Located in Binghamton, NY, the Broome County Veterans Memorial Arena hosts diversified entertainment for over half a million people each year. Besides being home to the United Hockey League's BC Icemen, the Arena also hosts such events as "Disney on Ice," concerts, trade shows, and other professional, scholastic and amateur sporting events. Since all of these events do not take place on ice, the Arena needed a multi-faceted chiller that would enable them to not only keep the ice cool, but also to keep the building itself comfortable for all event-goers. The 200-ton TECOCHILL STx system will provide air conditioning as part of a "hybrid" central utility plant for the arena. A hybrid plant allows users to alternate between different energy sources - such as electricity and natural gas - using whichever source is the most cost-effective at a given time. The system is scheduled to be in operation by the end of February. Tecogen's STx systems use R-134A refrigerant, which is widely accepted throughout the industry and is one of the most environmentally friendly refrigerants available. R-134A meets the terms of the Montreal Protocol, under which refrigerants are classified by their potential to deplete the Earth's ozone layer. About Tecogen Tecogen Inc. operates in the distributed generation market and is a leading manufacturer of natural gas-fueled commercial and industrial cooling and cogeneration systems. Tecogen has an installed base of more than 1,000 units, which it supports through an established network of engineering, sales, and service support. 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 $13 million.