 WALTHAM, MA, June 02, 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 two InVerde e cogeneration systems to a large residential building in Brooklyn, New York. The system will provide 250 kW of onsite power for the building with the cogenerated heat used for space heating and domestic hot water for the facility. 