EU Energy Performance in Buildings Directive requires that all buildings when sold or let have an Energy Performance Certificate (EPC). This directive came in force in January 2006 and is being progressively adopted in the UK.
The Energy Performance Certificate is broadly similar to the certificates found on many domestic appliances.
A Certificate for a building gives the building an asset rating based on its energy efficiency, but doesn't take into account how the home is used by the occupiers.
The Certificate will give the building a rating from A to G. An A rating shows it's very efficient, meaning lower fuel bills, while G is inefficient, meaning higher fuel bills. The Certificate will also show the building's environmental impact by indicating its carbon-dioxide emissions.
DEC - Display Energy Certificates
Display Energy Certificates (DECs) show the actual energy usage of a building, the Operational Rating, and help the public see the energy efficiency of buildings that are occupied by a public authority or an institution providing a public service.
This is based on the energy consumption of the building as recorded by gas, electricity and other meters. The DEC should be clearly displayed at all times in a prominent place clearly visible to the public.
Display Energy Certificates are valid for one year. The accompanying Advisory Report is valid for 7 years. The requirement for Display Energy Certificates comes into effect from 6 April 2008.
