What is a Display Energy Certificate?
A Display Energy Certificate, or DEC, shows the actual energy usage of a public building based on metered consumption over the previous 12 months. Unlike an EPC, which is based on the theoretical energy performance of the building fabric, a DEC reflects how the building is actually being used and operated.
Who needs a DEC?
DECs are required for buildings over 250m² that are occupied by a public authority and frequently visited by the public. This includes local authority offices, schools, colleges, universities, NHS buildings, museums, libraries, and leisure centres.
How often must a DEC be renewed?
For buildings over 1,000m², a DEC must be renewed annually. For buildings between 250m² and 1,000m², the DEC is valid for 10 years. In both cases, an accompanying Advisory Report must also be produced. The Advisory Report is valid for 7 years in buildings over 1,000m², and 10 years in buildings between 250m² and 1,000m².
What does a DEC look like?
A DEC displays an operational rating from A to G based on the building’s actual energy consumption compared to a benchmark for that building type. It must be displayed prominently in the building where it can be seen by visitors.
What are the penalties?
Failure to display a valid DEC carries a fine of up to £500. Failure to have a valid Advisory Report is a separate offence carrying a fine of up to £1,000.
What does the assessment involve?
An accredited assessor carries out an initial site visit to survey the building and produce the Advisory Report. Because that report lasts 7 years in buildings over 1,000m² (10 years in buildings between 250m² and 1,000m²), we return to re-survey when it expires. Alongside the survey, we use your energy consumption data (electricity, gas, and other fuel meters) for the previous 12 months. We then produce your DEC and Advisory Report and lodge both on the government register. If you also need an EPC assessment for the same building, we can combine both instructions.