Display Energy Certificates (DEC) were introduced in 2008. OGC publish central government departments’ Display Energy Certificate (DEC) operational ratings on a building-by-building level twice a year. The most recent data for the Ministry of Justice, published on 31 July 2009, which includes DEC ratings up to and including 28 February 2009 and can be viewed at:
Data to October 2008 can be seen at:
Data relating to the month ending 30 September 2009 will be published on 18 December 2009.