openstudio

OpenStudio is an open-source software platform for building energy modeling and optimization. It provides a graphical user interface, an extensible software development kit, and a library of automation scripts designed to streamline the creation, analysis, and sharing of building energy models. OpenStudio integrates with widely used energy modeling engines such as EnergyPlus for detailed hourly simulations and Radiance for daylighting analysis, and it can consume weather data and climate files to drive simulations. The platform emphasizes interoperability and reproducibility, enabling parametric studies and batch runs through a standardized workflow.

It comprises the OpenStudio Application, a GUI for authoring and editing energy models; the OpenStudio Software Development Kit, which exposes a Ruby API for extending functionality; a collection of OpenStudio Measures, small Ruby programs that modify models to automate tasks; and the OpenStudio Server, a companion service for cloud-based or local batch processing. Models are typically authored in the OpenStudio environment, then exported to EnergyPlus IDF input files for simulation, with results stored in a searchable project structure. The library of measures supports automation of common modeling tasks such as parametric sweeps, retrofits, and optimization studies.

OpenStudio runs on Windows, macOS, and Linux and is distributed under an open-source license. It is maintained by a community of developers and organizations worldwide, with documentation, tutorials, and community forums supporting users and researchers. Typical users include building designers, researchers, and energy modelers performing energy efficiency analysis for new construction, retrofits, or code compliance.