Energy Performance Certificates (EPCs)

Display Energy Certificates (DECs)

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Energy Assessment

Commercial & Domestic

© 2009 IAS

Terms of use


Display Energy Certificates (DECs)

Public authorities, and institutions providing public services to a large number of persons, who occupy space in a building with a total useful floor area greater than 250 m2, must display a valid Display Energy Certificate (“DEC”) at all times and have a valid Recommendation Report in their possession.

A DEC shows an operational rating which conveys the actual energy used by the building as opposed to an EPC which conveys an asset rating showing the intrinsic performance of the building.

For buildings over 1,000 m2 the DEC must be renewed annually and the Recommendation Report every 7 years. For buildings from 250 m2 to 1,000 m2 both the DEC and Recommendation Report are valid for up to 10 years.

Only public authorities or public institutions (those providing services traditionally associated with local or national government) occupying a building must display a DEC. Other private occupants of the same building are not required to display a DEC but may choose to do so voluntarily.

Are Display Energy Certificates (DECs) worth having?

A DEC is a tool identifying energy use in a way that allows year on year improvement to be targeted and displayed. It is often said that if you can’t measure it, you can’t manage it. That is why DECs are valuable.

Equally important is the Recommendation Report. A good one includes a range of recommendations about cutting energy use. We aim to show you how you can save money while saving the environment at the same time.

Unfortunately there are a lot of poor quality Recommendation Reports being produced. They comply with the requirement to have one, but they will not tell you much you don’t know. These are easy to spot because they will have little or nothing in the user defined recommendations section.

A good Recommendation Report is very specific to your building and the way you use it. It will have a number of user defined recommendations in addition to the standard text ones. Some of these are often ones which allow you to start saving money and reducing your carbon impact at little or no cost just by changing user practise.

HI Devon only produce Recommendation Report which include a number of building specific user defined recommendations. Our reports are not produced just for compliance, they are produced to help our clients achieve savings in cost and carbon emissions.

This does not mean our DECs are more expensive. It does mean they are more valuable and you should get the cost back many times over.


Your questions answered

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Display Energy Certificates (DECs)

Special rates for our volume clients

Special rates apply for buildings owned / occupied by several Local Authorities and PCTs who regularly use our services. Call for prices if you think you may qualify or if you have a number of buildings and would like to set up a corporate rate.