is in the Flemish city Ghent, the piping network of this power plant is 22 km long. The system dates back to 1958. Bulgaria Bulgaria has district heating in around a dozen towns and cities. The largest system is in the capital Sofia, where there are four power plants (two CHPs and two boiler stations) providing heat to the majority of the city. The system dates back to 1949. Czech Republic The largest district heating system in the Czech Republic is in Prague owned and operated by Pražská teplárenská, serving 265,000 households and selling c. 13 PJ of heat annually. Most of the heat is actually produced as waste heat in 30 km distant thermal power station in Mělník. There are many smaller central heating systems spread around the country including waste heat usage, municipal solid waste incineration and . Denmark In Denmark district heating covers more than 64% of space heating and water heating. In 2007, 80.5% of this heat was produced by combined heat and power plants. Heat recovered from waste incineration accounted for 20.4% of the total Danish district heat production. In 2013, Denmark imported 158,000 ton waste for incineration. Most major cities in Denmark have big district heating networks, including transmission networks operating with up to 125 °C and 25 bar pressure and distribution networks operating with up to 95 °C and between 6 and 10 bar pressure. The largest district heating system in Denmark is in the Copenhagen area operated by CTR I/S and VEKS I/S. In central Copenhagen, the CTR network serves 275,000 households (90–95% of the area's population) through a network of 54 km double district heating distribution pipes providing a peak capacity of 663 MW, some of which is combined with district cooling. The consumer price of heat from CTR is approximately €49 per MWh plus taxes (2009). Several towns have central solar heating with various types of thermal energy storage. The Danish island of Samsø has three straw-fueled plants producing district heating. Finland In Finland district heating accounts for about 50% of the total heating market, 80% of which is produced by combined heat and power plants. Over 90% of apartment blocks, more than half of all terraced houses, and the bulk of public buildings and business premises are connected to a district heating network. Natural gas is mostly used in the south-east gas pipeline network, imported coal is used in