Development Version of the LBT Grasshopper Plugin Now Uses OpenStudio 3.1

Hello All,

I just wanted to make an announcement that is only for people staying up-to-date with the latest development version of the LBT Plugin using the Versioner component. So this does not concern anyone using the last stable release of the LBT plugin (version 1.1.0 directly from Food4Rhino).

We just finished upgrading the development version of the LBT plugin to use OpenStudio 3.1 instead of OpenStudio 3.0, which the last stable release uses. We have updated the compatibility matrix accordingly. The changes to OpenStudio/EnergyPlus are significant so the latest development version of the LBT plugin works exclusively with OpenStudio 3.1 (3.0 is not surrpoted). Furthermore, Legacy Honeybee will have several missing features when run it with OpenStudio 3.1 since many of the changes in E+ break backwards compatibility. So, if you want to use the latest development version of the LBT plugin alongside the Legacy Honeybee plugin, we recommend installing OpenStudio 3.1 in your C:\Users\[USERNAME]\ladybug_tools folder to ensure the Legacy plugin does not load it.

With this said, OpenStudio 3.1 has several bug fixes in it that relate to Honeybee workflows. A number of issues in the detailed HVAC templates have been fixed. AirBoundaries also now simulate correctly within the Airflow Network (with full radiant eat transfer across the air boundary).

Still, these changes mean it is harder for people to jump back and forth from the latest development version of the LBT plugin to the last stable release. In case it’s helpful, the last development version that works with OpenStudio 3.0 is LBT 1.1.17. So you can always plug 1.1.17 into the versioner component to get the last LBT version that’s OS 3.0-compatible.


Eagerly waiting for this ! Thanks for the update @chris