Compliance meets reality.
Run compliance and performance home energy models locally, in minutes.
Optimise designs
Refine new build designs for performance, cost, and compliance.
Prioritise retrofit
Choose the right improvements for the biggest impact.
Future-proof
Model homes under future climate, tariffs, and occupancy scenarios.
How it works
Vulcan runs in your browser using local compute and storage for limitless, fast and secure energy modelling.
Shape your Building
Define zones, create elements, and set dimensions in minutes. Import Excel (CSV) files to integrate existing workflows.
Configure Scenarios
Compare different conditions, materials, and systems. Easily edit parameters. Run dozens of simulations in minutes.
Analyse outputs
Compare models on temperature, heating demand, operating cost, regulatory compliance and more.
Why Vulcan
Purpose‑built to deliver accurate models fast—and keep your data where it belongs.
Predict Realistic Performance
Use dwelling-specific inputs to predict realistic energy consumption and deliver more credible & useful advice.
Easy to Learn and Use
Vulcan's user interface, documentation, datasets and support make adopting the Home Energy Model easy.
Create Better Client Outcomes
Identify lower cost or disruption designs to meet client needs, and create a detailed baseline to measure impact.
Trusted by Energy Professionals
Leading organisations are using Vulcan
Working with Vulcan has been a great experience. As we've begun developing and testing models of properties, the support from the Vulcan team has been invaluable. They've been responsive, knowledgeable, and proactive in helping us understand and prepare for HEM.
Latest Insights
Stay updated with the latest energy modelling insights, tutorials, and industry analysis.
Modelling FHS: SAP or HEM?
SAP is staying for a little longer. Here's why Vulcan and leading assessors are preparing for HEM
Future Homes & Last Minute Syndrome
We diagnose UK Construction's last minute syndrome and discuss potential solutions
A Scalable Mechanism to Retrofit
We explain how Vulcan addresses system issues for homeowners to invest in retrofit