 WALTHAM, MA, Oct. 08, 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 it will be presenting at the 2021 LD MicroCap Investor Conference in Los Angeles on Tuesday, October 12, 2021 at 12:00PM PT 3:00PM ET. 