9-4CENTRALIZEDHEATINGSUPPLYItem20142013TotalAreaofHeatingSupply(10000sq.m)5678654591Residence3808536806HeatingSupplyCapacity(megawatt)4044538585HeatingfromThermalPowerPlants75097199HeatingfromBoilerHouses3293631386TotalHeatingSupply(10000gigajoules)3530033960HeatingfromThermalPowerPlants55185268HeatingfromBoilerHouses2978228692LengthofPipelines(km)1203811192Source:BeijingMunicipalCommissionofCityAdministrationandEnvironment.2014as%of2013104.0103.5104.8104.3104.9103.9104.7103.8107.6