Modelica library for building and district energy systems developed within IBPSA Project 1
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Corrected order of constant declaration to be consistent with package…
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Modelica IBPSA library

This is the development site for the Modelica IBPSA Library and its user guide.

Instructions for developers are available on the wiki.

Library description

The Modelica IBPSA library is a free open-source library with basic models that codify best practices for the implementation of models for building and community energy and control systems.

The development of the IBPSA library is organized through the IBPSA Project 1 ( of the International Building Performance Simulation Association (IBPSA). The development was organized from 2012 to 2017 through the Annex 60 project ( of the Energy in Buildings and Communities Programme of the International Energy Agency (IEA EBC).

This library is typically not used directly by end-users. Rather, it is integrated by developers of other Modelica libraries for building and community energy systems, who then distribute it to end-users as part of their respective library. Currently, the IBPSA library is used as the core of these libraries:


The Modelica IBPSA library is available under a 3-clause BSD-license. See Modelica IBPSA Library license .

Development and contribution

You may report any issues by using the Issues button.

Contributions in the form of Pull Requests are always welcome. Prior to issuing a pull request, make sure your code follows the style guide and coding conventions.