In power stations, more than half of the heat supplied in the fuel is treated as waste heat.
In combined heat and power plants, cogeneration heat reaches the heat distribution grid and heating substations located in residential buildings. Through them the heat goes to internal systems used for heating flats and domestic hot water.
Combined generation (cogeneration) results in better utilization of fuel and less natural environment pollution. CHP technology may use various fuels, both fossil and renewable. It has been used for many years, mostly in industrial, large commercial and institutional applications.