Water heating by a domestic water heater. Two conflicting safety issues affect water heater temperature—the risk of scalding from excessively hot water greater than , and the risk of incubating bacteria colonies, particularly "Legionella", in water that is not hot enough to kill them. Both risks are potentially life-threatening and are balanced by setting the water heater's thermostat to . The European Guidelines for Control and Prevention of Travel Associated Legionnaires’ Disease recommend that hot water should be stored at and distributed so that a temperature of at least and preferably is achieved within one minute at points of use. If there
Coal Drops Yard 15 to 1,800 square metres. Coal Drops Yard Coal Drops Yard is a retail development in the King's Cross Central scheme in London. The two Victorian coal drops sheds were used to receive coal from South Yorkshire and trans-ship it to narrowboats on the Regents Canal and to horse-drawn carts; they processed 8m tonnes a year. Coal was the only form of energy available to heat and light the buildings of London, either directly or after having been converted to coal gas in the adjacent gas works. Coal use was challenged by electricity, and electricity prevailedthe coal drops were redundant