From Drawings to
Compliance
Upload your floorplans, build the model in simple steps, and get the report at the end. Here is the whole process, start to finish.
Four Steps
Model the dwelling
Upload your floorplans and build the 3D model in a few simple steps. Set rooms, orientation and construction build-ups as you go. Pick build-ups from the library or define your own.
Set the strategy
Glazing areas, shading, openable free area and any mechanical ventilation, including the noise, security and fall-protection limits that reduce what actually opens.
Press run
The Simplified Method, full TM59 dynamic simulation on EnergyPlus, or both. A single dwelling takes minutes; a whole site runs as one batch.
Export the evidence
A branded overheating strategy report with every input, assumption and weather file reference behind the result.
What Happens When You Press Run
The engine
Simulation runs on EnergyPlus, the US Department of Energy's open-source building energy simulation engine. It is the reference implementation much of the industry's thermal modelling is built on, which means your results are reproducible and defensible rather than resting on a calculation of our own.
Weather data
You supply the weather file. Upload the CIBSE Design Summer Year file for your location (DSY1 for the current climate period on most TM59 assessments, or a future-climate file if you want to test how long the design holds up), and every dynamic run uses it. Upload it once and it is available to every dwelling on the site.
Occupancy and gains
This is the part that makes TM59 tractable. The methodology fixes occupancy profiles, internal heat gains and window-opening behaviour, so two assessors modelling the same dwelling should reach the same answer. AutoTHERMAL applies those profiles automatically. You can inspect them. You do not have to invent them.
What gets tested
- Daytime comfort: for living rooms, kitchens and bedrooms, hours where operative temperature exceeds the adaptive comfort threshold must not exceed 3% of occupied hours between May and September.
- Bedroom nights: for bedrooms, hours between 10pm and 7am above 26°C must not exceed 1% of annual night-time hours.
Both must pass. In practice the bedroom test is the one that catches developments, and it usually points at night ventilation rather than solar gain.
What comes back
A pass or fail against each test, the margin on each, the worst-performing room, and the full hourly timeseries if you want it. Plus the report in your own branding, with the inputs, assumptions, results and the mitigation measures in the design.
Try it on the development on your desk
Join the waitlist and we will let you know when there is a place.