The heating of buildings in Moscow, like in other cities in Russia is done using central heating system. Before 2004, state unitary enterprises were responsible to produce and supply heat to the clients by the operation of heating stations and heating distribution system of Mosgorteplo, Mosteploenergo, and Teploremontnaladka which gave service to the heating substations in the north-eastern part of the city. Clients were divided between the various enterprises based on their geographical location. A major reform launched in 2004 consolidated the various companies under the umbrella of MIPC which became the municipal heat supplier. Its subsidiaries were the newly transformed Joint-stock companies. The city's main source of heating is the power station of Mosenergo which was reformed in 2005, when around ten subsidiaries were separated from it. One of the newly independent companies was the District Heating Network Company (MTK) (). In 2007 the Government of Moscow bought controlling stakes in the company.