 WALTHAM, MA, March 24, 2021 GLOBE NEWSWIRE -- via NewMediaWire -- Tecogen Inc. OTCQX: TGEN, a clean energy company providing ultra-efficient and clean on-site power, heating and cooling equipment, is pleased to announce the sale of a 200-ton Tecochill unit to a large high school in Western Connecticut. The system replaces a Tecochill unit that has been running at the school for almost 30 years and includes a renewed maintenance contract that will be serviced out of Tecogens Connecticut service center. 