BEMcyclopedia - The Energy Modeling Knowledgebase

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BEMcyclopedia was created as a free resource for energy modelers to learn about building energy modeling (BEM), and to share their knowledge with others. The content is organized into two main areas. The "Learn by Design Task" section of the site is a collection of educational resources, organized around a typical building design project’s timeline.  The "Essential BEM Concepts" section is a collection of general BEM knowledge and fundamental skills that apply to a variety of BEM tasks.

The scope of this site is focused on building performance analysis with a focus on energy and emissions. Other building analysis types such as daylight analysis and CFD are not explicitly covered, except where they may be integral to a specific type of energy analysis. All content is intended to be described in a "software-neutral" manner such that the guidance may be applied to any energy modeling software that you may choose to use.

Anyone can contribute! This site's content is provided for the BEM community, by the BEM community. Create an account today to get started! Then, learn more about how the site is organized, how to contribute, how to get editing rights, and guidelines for contributions by visiting the help guide for contributors.

Learn by Design Task Essential BEM Concepts

Understand how BEM can help make design decisions throughout all phases of the project.

These tutorials show how BEM analysis can support specific design goals in each phase of a project. The design process is presented as a timeline with specific BEM analysis tasks mapped to design tasks performed by architects and engineers during a design project.


Learn the fundamentals of BEM and the underlying building science principles that are represented in models.

These tutorials are not strictly linked to a specific phase of the design process but contribute to practitioners' understanding of how to use BEM effectively. They help provide an understanding of how to create models, and how to interpret and present the results effectively.

This work was supported by the Assistant Secretary for Energy Efficiency and Renewable Energy, Building Technologies Office, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.

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