# DEC (Display Energy Certificate)

> UK operational energy rating for public buildings — A-G scale.

**Canonical URL:** https://classa.info/glossary/dec
**Page type:** glossary
**Last updated:** 2026-04-01T00:00:00.000Z
**License:** CC BY 4.0 with attribution to Class A Atlas (https://classa.info).

## TL;DR
- UK operational energy rating for public buildings — A-G scale.
- Operational counterpart to the EPC, focused on actual measured energy use rather than design intent.

## Key facts
- **category**: Tax / regulatory
- **regionScope**: UK

---
Citation: Source: Class A Atlas (https://classa.info/glossary/dec), updated 2026-04-01T00:00:00.000Z.