Energy Plus 8.2.0 software
EnergyPlus, the simulation engine used within the ACCIS framework, is an open-source BES software developed by both the Lawrence Berkeley National Laboratory and the U.S Department of Energy. It is used by engineers, architects, and researchers to model both energy consumption and water use in buildings. This software is a console-based program which reads inputs and writes outputs to text files. It was originally written in FORTRAN programming language; however, it is written in C++ since version 8.2.0. This software and its programming language are difficult to understand, so some graphical user interfaces, such as DesignBuilder or OpenStudio (33), have been developed to be used by people with no programming experience.