Your range, run on the Home Energy Model, today.
The Home Energy Model changes how homes are assessed. HEM Access runs your products against it today, across the UK archetypes that matter, and your results stay yours, held apart from everyone else's.
The earliest of the three stages of HeatAssure, from Aeterno: before any home is on the record, your range is read against the standard it will be judged by. The later stages: Design Studio · Commissioning Verification
The standard your range is scored by is changing.
HEM moves the assumptions that decide how heat pumps score in the homes you sell into, and early sight of your own numbers is the whole value of this stage.
HEM Access gives product, engineering and data teams a way to work with it today: certified product data mapped to HEM inputs, scenarios across agreed archetypes, and readouts your leadership acts on.
The published standard, in a working form.
Four working parts, delivered together as one workflow.
Direct HEM scenario access
A controlled workspace for running and comparing Home Energy Model scenarios, question by question, in one place.
Certified product data, mapped
Public certification and manufacturer product data mapped into HEM-compatible records through a maintained EN 14825 route. Product selection and updates are part of the package.
Archetype and assumption comparison
Product choices compared across agreed UK dwelling archetypes, with the assumptions that move the result exposed rather than buried.
Repeatable readouts
Consistent R&D and planning outputs from the same workflow, with source, assumption and version recorded from the start.
Your scenario results are yours: they stay in your own environment and are never pooled with anyone else's, in any form, and the rules that hold that boundary are published on Trust.
Built for the teams who answer for the range.
Product and R&D teams
Run product scenarios, test assumptions, and see which inputs materially change HEM outcomes for the homes you sell into.
Product data teams
Certification and manufacturer product data stays connected to HEM-ready inputs, instead of mappings rebuilt by hand each time.
Leadership
Plain readouts, a clear boundary between R&D and external use, and results your teams can act on.
- Manufacturer-agnostic by design: evidence from any maker’s systems, with certified products from 178 manufacturers in the record today.
- The Home Energy Model, run at 20 million home scale.
How every calculation is validated, and the working behind these claims: Technology.
Where the boundaries sit.
Bring your product set.
A briefing covers the product set, the archetypes that matter for your range, and what the first readout looks like. It is sold as an annual licence, with the first piece of work scoped before it starts.