Openstudio 2.9.1 May 2026

OpenStudio 2.9.1 was primarily a stability and bug-fix release following 2.9.0. Key features introduced in the 2.9 cycle included:

If you are maintaining older models or need to reinstall this specific version, these details are critical: openstudio 2.9.1

The most critical aspect of 2.9.1 is its tight integration with EnergyPlus 9.3.0. While later versions of EnergyPlus introduced new HVAC objects and improved humidity control models, 9.3.0 is considered exceptionally reliable for standard commercial building simulations. OpenStudio 2.9.1 maps perfectly to this engine, ensuring that your .osm file translates to an .idf without translation errors. OpenStudio 2