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We're excited to announce the release of Version 6.3, available to current customers immediately via the Product Downloads page! We've compiled several highlights and new features that we're pleased to share with you below.

Postprocessing Enhancement

When post-processing results, it can be helpful to quickly find trouble areas. You can now filter the visible objects that are outside of the color bar range. This lets you quickly find and select items that are within a user-specified temperature range. If you set the minimum color bar temperature to the maximum allowable temperature in your system, you will see only objects that are violating that criteria.

In addition, you can now set your own color bar subdivisions.

Post-processing Filter
Visible model (left) and filtered
post-processing results (right) showing only
objects within a specified temperature range

FloCAD® Path Links

FloCAD submodels cannot exchange fluid with any other submodels, nor can two fluid submodels be connected using a path. But now you can create a "logical link" between two submodels with the new Path Link object. A Path Link provides a way of linking two such paths, one in each submodel, such that they mimic each other. The flow in one submodel is used to set the flow in another submodel.

The Path Link object has been added to the Thermal Ribbon, the Fluid Ribbon, and is also available via the command line.

Path Link
Connecting fluid submodels with new
Path Link object



There's an entirely new way to use OpenTD: Addins are programs that can be run within the TD process, making it possible to add functionality to Thermal Desktop® that is indistinguishable from native commands. Anything that can be done within a traditional out-of-process OpenTD program can be done in an Addin, using the same familiar interface.


The OpenTD interface has been expanded to include support for measures, global drawing preferences, post-processing data mappers, running and connecting to SINDA/FLUINT models, and access to the powerful Thermal Desktop logging framework, among hundreds of other enhancements.

System Coupling GUI
System Coupling Interface showing
real-time plotting of convergence data

Co-Solving with

System Coupling Interface

CRTech's Thermal Desktop has been extended to leverage the capabilities of the ANSYS System Coupling Graphical User Interface (GUI). The System Coupling GUI provides much easier setup of co-solving analysis and run parameters compared to the Python scripts previously required. The new interface offers dynamic display plotting of convergence, post-processing of results, an interactive command console, and much more.


CRTech now offers a proprietary version of AutoCAD to customers in air-gapped work environments. Autodesk's new online activation process means that our customers in protected areas would otherwise no longer be able to activate AutoCAD software. CRTechCAD allows us to continue offering network and standalone licenses in these types of settings.

CRTechCAD also allows us to continue providing perpetual licenses as Autodesk changes to a subscription-only model. It lets us provide network licensing as Autodesk phases out this offering.

Upcoming Webinars

What's New in Thermal Desktop Suite V6.3


Join us as we walk through some of the the major new features and functionality that have been added to Thermal Desktop in Version 6.3.

Click here to view a recording of the webinar.

What's New in OpenTD V6.3

Thu, May 19 10–11am MDT

In this webinar, we'll cover some of the many new enhancements to OpenTD functionality that were introduced in Version 6.3.

Click here to register for this webinar.