The Display Energy Certificate differs from its domestic/commercial EPC counterpart in that the DEC incorporates an Asset Rating and Operational Rating.

Since December 2009, DECs have only been issued for public buildings.

+ Improve energy efficiency by implementing the recommendations outlined in the Advisory Report.

+ Set and monitor energy efficiency targets, allowing clients to track energy consumption and encourage ongoing improvements.

+ Publicly demonstrate strong energy performance, showcasing a commitment to sustainability and responsible energy use.

Display Energy Certificates (DEC)
Display Energy Certificates show the actual energy usage of a building, its Operational Rating, and offer information to the public in relation to the energy efficiency of a building.
The certificate must always be displayed in a visible place.

Operational Rating
Operational Rating means a numeric indicator of the amount of energy consumed during the occupation of the building over a period of 12 months.

Only buildings with a total useful floor area of 250m² that are occupied, or part occupied, either by public authorities and institutions offering public services to large volumes of people are affected by this legislation.

Where a building is partly occupied by a public authority, or a relevant institution,
the authority or institution handles displaying a DEC and having a valid Advisory Report.

Other private organisations occupying the building, irrespective of the size they occupy, do not need to display a DEC