What does a DEC contain?
A DEC must contain, by law1, the following information: • the operational rating and the asset rating (if available) as determined by the government approved method • show the operational ratings for the building expressed in any certificates displayed by the occupier during the last two years before the nominated date • include a reference value such as a current legal standard or benchmark The DEC will also show the unique certificate reference number, the address of the building, the total useful floor area2 of the building, the name of the energy assessor, their employer (or trading name if self employed), the name of their accreditation scheme and the date when the DEC was issued. The DEC must be accompanied by an Advisory Report. DECs are valid for 12 months, Advisory Reports 7 years. 1 SI 2007:991 The Energy Performance of Buildings (Certificates and Inspections) (England and Wales) 2007. 2 The Total useful floor area is defined as the total area of all enclosed spaces measured
