What Does a Display Energy Certificate Look Like?

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A This provides information about the building that the DEC applies to.

B Every DEC has a unique number. This number can be used to locate and get a copy of the certificate from the national register and to verify the validity of a DEC.

C The energy used by the building is converted into an amount of carbon dioxide (CO2). Different types of fuel emit different amounts of CO2. This shows how the energy use has changed over the last three years. The smaller the bar, the better the performance. This building has improved its performance over the last three years. Below the zero line show CO2 savings from Low and Zero Carbon energy sources. The benchmark is the average energy performance for a building of this type. A number below the line indicates the building is below average energy performance. A number above the line indicates the building is above average performance.

D This section of the DEC shows Operational Ratings from previous years. This building has improved its Operational Rating i.e. is using less energy and emitting less CO2 than in previous reports.

E This shows key information about how the certificate was prepared.

• Assessment software
  This shows which energy assessment method was used to produce the certificate.
• Property reference
  This is a unique reference number which identifies the building.
• Assessor Name and Number Accreditation scheme
  This identifies the assessor who produced the certificate with details of their accreditation scheme and their membership number.
• Issue and nominated date
  This shows the date of issues of the certificate and the date from which the DEC is valid (i.e. the nominated date).

F This provides technical information about energy use. Further details are available in a full technical table.

G This shows the relevant elements of technical information used to produce the certificate.

• Main Heating Fuel
  This indicates the main type of fuel used to heat the building.
• Building Environment
  This indicates how the internal environment of the building is conditioned.
• Total useful floor area
  This is the total area of all enclosed spaces measured to the internal face of the external walls (in accordance with the definition in the Building Regulations).
• Asset Rating: The asset rating of a building reflects the energy performance of that building in terms of the way it is built rather than the way it is used (standard use is assumed). It will appear here if the building has an Energy Performance Certificate (EPC). Asset ratings are on a scale of 0-150, where 0 is the most energy efficient building and 150 is the least energy efficient building.

H This is the Operational Rating for this building. The rating shows the energy performance of the building as it is being used by the occupants. A building with performance equal to one typical of its type would therefore have an Operational Rating of 100. A building that resulted in zero CO2 emissions would have an OR of zero, and a building that resulted in twice the typical CO2 emissions would have an OR of 200. This rating indicates the building is being operated below average performance for a building of this type.



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