Tecogen Inc. specializes in the design, manufacturing, sales, and ongoing support of industrial and commercial combined heat and power (CHP) systems. These energy solutions cater to a wide range of applications—residential, commercial, recreational, and industrial—both within the United States and internationally. The company's operations are segmented into three main areas: Products, Services, and Energy Production. Its product offerings include: Cogeneration units, such as the InVerde e+ and TecoPower models, which efficiently produce both electricity and hot water. TECOCHILL branded chillers for air conditioning and refrigeration purposes. Tecofrost gas engine-driven compressors used in refrigeration systems. Ilios brand water heaters. Ultera emissions control technology. Beyond equipment sales, Tecogen provides extensive support services, including long-term maintenance contracts, spare parts sales, and comprehensive turnkey installation. These services are delivered through a network of eleven field service centers located strategically across California, the Midwest, the Northeast, the Southeast, and Ontario, Canada. Additionally, the company undertakes the installation, ownership, operation, and maintenance of distributed generation systems for electricity and other energy solutions, along with complementary technologies. Tecogen serves a diverse clientele spanning numerous sectors, such as healthcare (hospitals, nursing homes), education (colleges, universities), hospitality (hotels, motels, health clubs, spas), commercial real estate (office, retail buildings), manufacturing (food and beverage processors, factories), multi-unit residential properties, and specialized facilities like laundries, ice rinks, swimming pools, municipal buildings, military installations, and indoor growing operations. Established in 2000, Tecogen Inc. is headquartered in Waltham, Massachusetts.