All houses in Russian cities are heated by one source, which is called TPP (thermal power plant). They heat water and spread it over the city via special hot pipes to provide warmth to houses. Krasnoyarsk is a big Russian
city where eight months of a year are freezing cold. And how can such a large Siberian city be heated from one source? It's impossible. So the city has three sources like this. One of them is TPP - 3.