Thermal Ventures II, LP, of Youngstown, Ohio, acquired the assets of the district steam heating system owned and operated by Detroit Edison that serves downtown Detroit. Thermal Ventures II has established a Michigan-based Detroit Thermal LLC, to own and operate the system. Thermal Ventures II operates district heating, cooling or both services in Youngstown and Akron, Ohio, Richmond and Martinsville, Va., and Orange County, Calif. The steam system has been in service since 1903 and currently serves 136 customers occupying 275 buildings in the downtown area.