Prove Part O compliance without the guesswork. autoTHERMAL will run both Approved Document O routes, the Simplified Method and full CIBSE TM59 dynamic thermal modelling, in one browser-based tool.
Both Part O routes
The Simplified Method and full TM59 dynamic modelling in a single model.
TM59 Criteria A & B
Assessed automatically across 8,760 hourly timesteps.
Audit-ready reports
Every result traces back to its inputs, weather file and assumptions.
Browser-based
Nothing to install, and nothing to keep updated on your machines.
Overheating analysis that keeps up with your design
Approved Document O made overheating a hard pass-or-fail gate on every new residential scheme in England. Getting it wrong late in a project means re-glazing, re-specifying ventilation, or re-submitting, all at your cost.
autoTHERMAL puts both compliance routes in one place. Start with the Simplified Method for a fast early-stage check on glazing areas and free areas. When a plot fails, or when you need the design freedom, switch the same model to full dynamic thermal simulation against CIBSE TM59 without rebuilding anything.
The result is a defensible, auditable overheating strategy you can hand to a Building Control Body, and the evidence to push back when a consultant tells you the only fix is smaller windows.
autoTHERMAL is coming soon. [Get in touch](/contact) to hear when it launches, or to talk about early access.
The rest of the range
PSI value calculation
Change the way you calculate PSI values. autoPSI is quick, precise and user-friendly software for thermal modelling construction junctions in minutes.
- Junctions modelled in minutes
- Precise, not default
- Built for technical teams
Part L photographic evidence
Effortlessly achieve Part L evidence compliance. autoBREL replaces manual processes, shared drives and email chains with one guided photographic evidence app.
- Guided evidence capture
- Labelled as it is taken
- Submission-ready packs
Home Energy Model
The Home Energy Model replaces SAP as the government's methodology for assessing the energy performance of new homes. autoHEM is our tool for working to it.
- Built for HEM, not adapted from SAP
- For the teams who ran SAP
- Alongside the rest of the range