Display Energy Certificate (DEC)
A DEC is an energy rating for public buildings over 250 m² based on actual energy consumption, displayed publicly to show how energy-efficiently the building is being operated.
What is Display Energy Certificate (DEC)?
Unlike EPCs (which rate a building’s theoretical efficiency based on physical characteristics), DECs are based on actual metered energy consumption data. They rate buildings from A to G using an operational rating that compares actual consumption to a benchmark for that building type. DECs must be displayed prominently in public buildings and are renewed annually (for buildings over 1,000 m²) or every 10 years (for buildings 250–1,000 m²).
Practical Examples
A local authority displays DECs in all its office buildings, with ratings ranging from B to E, driving investment in the lowest-performing properties.
A school achieves a DEC rating of C after implementing energy monitoring and behaviour change programmes, improving from D the previous year.
How Climatise Helps
Climatise provides the actual energy consumption data needed for DEC assessments, tracking performance against benchmarks and year-on-year trends.
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