27 7/8  BIS central bankers' speeches  27 The Building Research Establishment Environmental Assessment Method (BREEAM) is an  international independent benchmark to measure and verify the sustainability credentials of a building. The Bank operates an energy management system at each of its sites, to the ISO 50001 international energy performance standard.
The results are already evident: a 20 percent reduction in energy consumption at our currency centre since March 2017. This is equivalent to over 1.4 million kilowatt hours, 402 tonnes of carbon dioxide or a saving in excess of e97,000.