Installer guide
EPC rating check for installers: what it helps with, what it does not
An EPC rating check is useful context. It is not a substitute for live survey evidence around emitters, electrics, access, and system constraints.
Use an EPC rating check for context, not certainty
- Baseline energy-performance context.
- Historic clues about fabric and heating assumptions.
- A prompt for questions that need verifying on site.
What still needs live evidence
- Emitter details and room-level context for design work.
- Electrical intake evidence and obvious supply constraints.
- Access, routes, and plant-space decisions the EPC never shows.