PyroSim, Pathfinder, and Ventus 2025.1 - Available Now

We're happy to announce the 2025.1 release of all Thunderhead products. In addition to working on improvements to PyroSim, Pathinder, Ventus and Results, we've also taken time to make our documentation easier to use. Also, each product has updated tutorials or videos to help you adapt more quickly to our newest features.

Documentation Improvements

We aspire to create applications that are easy to learn and easy to use. This applies to our documentation as well.

User Manuals have an updated navigation that has been reorganized for more consistency across all of our products. In addition, each item in the navigation can be toggled to see subsections, allowing you to dive down to a specific topic quickly and easily.

Changelog and Known Issues

Looking for the list of all improvements, features, and bug fixes in this release? The Changelog is now available in the User Manual. We've added a new section of Known Issues right below the Changelog that will grow over time. Don't worry, the Release Note page is still useful. Download the latest release, read about the newest features and more!

Release Note Additions

Release Notes now include a Table of Contents for easy scanning of all new Feature and changes. In addition, new & updated Tutorials and Additional Resources have been added to get up to speed faster.

Release Notes now have a useful Table of Contents.

Software Updates

Ease of Use Improvements

All of our products received a number of shared improvements. Import PDFs as background images for model creation. See Dimension Labels when drawing to more quickly see the size of your Object. Find Objects by Tag to create quick customized selections.

Dimension Labels help you model with precision and ease

PyroSim 2025.1

PyroSim 2025.1 introduces Mesh Refinement Zones as an easier path to increase or decrease the cell resolution of your model. Although adjusting these zones has always been a feature of our 3D user interface, Mesh Refinement Zones make in model changes as easy as drawing an object in your model.

Refine your model intuitively with Mesh Refinement Zones

Learn more about PyroSim 2025.1 on the latest PyroSim Release Note. If you'd like to hop straight into how Monte Carlo variations work, look no further than the PyroSim User Manual or this YouTube overview.

Pathfinder 2025.1

Pathfinder 2025.1 brings Monte Carlo into the main user interface, allowing any user to quickly create randomized changes to initial conditions. When combined with Scenarios, you can now create one model that contains multiple versions of a model along with configurable Monte Carlo Variations.

Configure Monte Carlo Variations in a new dialog

Learn more about Pathfinder 2025.1 on the latest Pathfinder Release Note. If you'd like to hop straight into how Monte Carlo variations work, look no further than the Pathfinder User Manual.

Ventus 2025.1

Ventus 2025.1 provides a number of additional Flow Path options as well as an Advanced Search and easy to use Level selector. Add manufacturing fan data into Ventus to more accurately model stairwell air flow using the Performance Curve Flow Element. Use the QvP Flow Element to define leakage from dampers. Additionally, the Two-Way Flow Elements increases fidelity of your model with regard to contaminant transport.

Learn more about Ventus 2025.1 on the latest Ventus Release Note. Ventus received a healthy dose of new and updated Tutorials this release, which are also referenced at the link above.

Results 2025.1

Results 2025.1 adds a number of handy improvements as well. View the output of Scenarios and Monte Carlo Variations when Pathfinder simulation output. All of the combinations of Scenarios and Variations are visible in Results using a convenient switcher to view each one.

This version of Results also allows post-processing of FED and Visibility when combining a PyroSim and Pathfinder output. Determine whether you need to adjust Occupant paths using existing simulation output.

Visualize FED data in post-processing in Results 2025.1

View the Release Notes for PyroSim 2025.1 and Pathfinder 2025.1 to learn more about Results 2025.1.

Let us know how we can help

We release a new version of our products twice a year. Many of the improvements you have read about, and hopefully use, were created in partnership with professionals like you. Our worldwide customer base includes a wide range of professionals and industries. We have regional partners that provide training, support and localized versions. In addition, we provide academic and AHJ non-commercial licenses to support future employees and reviewing entities all across the globe.