2.9.1: Openstudio

April 13, 2026 (Retrospective Analysis) Software: OpenStudio Version: 2.9.1 Release Date: Approximately December 2020 – January 2021 Platform: Windows, macOS, Linux

OpenStudio 2.9.1 remains a significant milestone in the evolution of building energy modeling (BEM). Released by the National Renewable Energy Laboratory (NREL) in late 2019, this specific version is often cited as the "gold standard" for users of legacy tools and specialized workflows that require precise compatibility with older software environments. Why OpenStudio 2.9.1 Matters openstudio 2.9.1

OpenStudio 2.9.1 is a following the major 2.9.0 update. It serves as a stable intermediate version between the 2.8 series and the later 2.10/3.0 releases. This version is notable for integrating EnergyPlus 9.4.0 , improving the Radiance interface for daylighting, fixing critical bugs in the graphical user interface (SketchUp plugin and Application), and enhancing the reporting system. It remains a reliable choice for users requiring stability without the breaking changes introduced in OpenStudio 3.x (e.g., transition to Ruby 2.7+ and EnergyPlus 22.1+). It serves as a stable intermediate version between the 2

OpenStudio 2.9.1 comes with several exciting features that make building energy modeling and simulation more efficient and accurate. Some of the notable features include: OpenStudio 2

The SketchUp Ruby Console ( Extensions → OpenStudio → Ruby Console ) is your best friend. Learn these three one-liners:

One of the most famous aspects of the 2.x era was the Tight integration with Trimble's SketchUp. The OpenStudio SketchUp Plug-in allowed modelers to draw 3D spaces, match surfaces, and intersect geometry visually rather than doing it mathematically. In version 2.9.1, the plugin was tightly wedded to SketchUp 2017. SketchUp Community 3. The Measures Framework