Building Energy Modeling

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This OpenStudio energy model was used to evaluate the conversion of a 1950s Army barracks to a zero net energy (ZNE) office building as part of the Fort Carson (CO) Energy Research Project.
Matt Leach, NREL

Whole-Building Energy Modeling (BEM) is a versatile, multipurpose tool that is used in new building and retrofit design, code compliance, green certification, qualification for tax credits and utility incentives, and real-time building control. BEM is also used in large-scale analyses to develop building energy-efficiency codes and inform policy decisions. So what exactly is BEM? And what roles does the U.S. Department of Energy (DOE) play in the BEM industry and community? Learn more about BEM, its uses, and BTO’s BEM portfolio ►

End-Use Breakdown: The BEM Blog

The OpenStudio World Is Flat
FloorspaceJS is new open-source 2D floor-plan editor. It will initially complement the OpenStudio SketchUp plug-in and eventually replace it.
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BuildSimHub Brings GitHub to Building Energy Simulation
Startup BuildSim’s new offering brings GitHub’s project management, version control, and collaboration features to building energy simulation.
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Trane Switches Engines with TRACE 3D Plus
Trane is releasing a re-architected TRACE, with DOE's whole-building energy modeling engine EnergyPlus™ inside.
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OpenStudio Comes Full Polygon
The original OpenStudio—the EnergyPlus SketchUp plug-in—is going home. Big Ladder Software is taking over the tool, which is being rebranded Euclid.
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Lucid Leverages DOE Tools and Small Business Program to Deliver Enhanced Energy Data Services
Oakland-based Lucid leveraged DOE’s Building Performance Database and Small Business Voucher program to develop a free energy benchmarking service.
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simuwatt Relaunches Energy Auditor
After a successful Department of Defense (DoD) Environmental Security Technology Certification Program (ESTCP) prototype and pilot, Denver-based si...
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Finally, a Major Update from OpenStudio
End users may not notice big changes in OpenStudio 2.0.0, but the underlying development platform has been drastically revamped to make third-party ap
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Autodesk Upgrades Insight360 with EnergyPlus Annual Energy Simulations

At GreenBuild, Autodesk unveils an upgrade to its Insight360 suite of tools that will allow architects to run annual EnergyPlus simulations from...

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BetterBricks Leverages DOE Tools to Spark Deep Energy Retrofits
NEEA (Northwest Energy Efficiency Alliance) is using EnergyPlus and OpenStudio to help drive building renewal, a real estate strategy that targets dee
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New OpenStudio-Standards Gem Delivers One Two Punch

A new Ruby gem, openstudio-standards, delivers two significant and closely related capabilities—creation of prototype building models and automated...

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Resources for Modelers and Stakeholders

Unmet Hours
A peer-to-peer help and support forum for BEM with search, voting, and notification tools. BTO uses UnmetHours to support EnergyPlus and OpenStudio.
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Building Energy Software Tools Directory
Hosted by IBPSA-USA, this directory has vendor-driven content and supports images, video, ratings, reviews, and search, sort, and filter functions.
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BEM Guide for Owners and Managers
Created by Rocky Mountain Institute, this guide gives BEM clients like building owners information needed to engage with and contract BEM services.
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Amir Roth
Building Energy Modeling Technology Manager