Harri Juhani Kemppi

One1 Oy provides renewable energy and energy efficiency services and solutions for energy companies, municipalities, and communities, as well as developers and property owners. It offers district cooling, network, and equipment solutions, intelligent hybrid systems, heat pumps, bio boilers and plants, solar collectors and panels, as well as energy sales, maintenance, and exhaust air heat pump design and implementation services. The firm also supplies energy efficient district heating and consumer systems interface solutions. The company was founded by Jukka-Pekka Bergman, Mika Petteri Kallio, and Harri Juhani Kemppi on June 18, 2010 and is headquartered in Lahti, Finland.