Openstudio 2.9.1 🎯 Must See

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:

One standout feature of OpenStudio 2.9.1 is its "Results View" post-processor. It handles annual run periods (weather files) with remarkable clarity. Energy modelers have noted that this version correctly parses RunPeriod outputs without the occasional meter-aggregation bugs found in version 2.8.x.

The SketchUp Ruby Console (Extensions → OpenStudio → Ruby Console) is your best friend. Learn these three one-liners: openstudio 2.9.1

LEED submissions require consistency. Many Green Business Certification Inc. (GBCI) reviewers have accepted models built in OpenStudio 2.9.1 with EnergyPlus 9.3.0 without requesting re-simulation in a newer engine. The standard reporting measure LEED_Summary in 2.9.1 correctly generates the required tables for EA credit Optimize Energy Performance.

As of 2026, OpenStudio 2.9.1 is officially an end-of-life (EOL) version. NREL does not provide security updates or support for EnergyPlus 9.3.0. However, the building energy modeling community has established unofficial forums (especially on UnmetHours.com and the OpenStudio Google Group) where users actively share patches and measure scripts for 2.9.1. OpenStudio 2

If you are starting a brand-new project that will last 3+ years, consider migrating to a newer version. But if you are maintaining a portfolio of 100+ existing models, or you need to reproduce results from an ASHRAE research project completed in 2021, OpenStudio 2.9.1 remains an indispensable tool.

Version 2.9.1 introduced improved default templates for: One standout feature of OpenStudio 2

The HVAC Systems tab in the OpenStudio interface became noticeably more responsive, allowing modelers to drag and connect components (coils, fans, zones) without crashing—a frequent complaint in earlier 2.7.x builds.