Energy Certificates for Public Buildings (DEC)

If you manage a public building like a library, leisure centre or council office, we produce the Display Energy Certificate you're legally required to show on your premises every year.

Energy Certificates for Public Buildings (DEC)

About the service

What is it:

A Display Energy Certificate (DEC) shows the actual energy performance of a public building based on real energy consumption rather than a theoretical model.

Unlike a BER cert which estimates how a building should perform, a DEC measures how it is actually being operated using 12 months of real energy bills. It rates the building on an A to G scale and must be displayed publicly on the premises at all times.

Who Needs it:

You'll need a DEC if you manage a public building that:

  • Is occupied by a local authority or institution providing public services
  • Has a total floor area greater than 250m²

Typical buildings that require a DEC include:

  • Public libraries
  • Swimming pools
  • Museums
  • Local authority offices

How it works: 

  • We collect 12 months of your energy bills covering electricity, gas and oil
  • We calculate your total energy consumption per square metre per year
  • Your building is rated on the A to G scale relative to similar building types
  • The DEC is submitted and published for display on your premises
  • We also produce an Advisory Report with recommendations to reduce energy use

What you get

  • Your official DEC certificate, valid for 1 year and required to be displayed publicly
  • An Advisory Report on reducing energy use, valid for 7 years

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