The complete program package for building energy design BSim is a computer tool that offers advanced simulation facilities for building designers, engineers, architects and others engaged in analysing hygrothermal conditions, when planning, designing or analysing energy consumption and indoor climate in connection with the design for allmost any type of buildings.
With BSim it is possible to perform all simulations and calculations based on one single building model.
ESP-r is an integrated energy modelling tool for the simulation of the thermal, visual and acoustic performance of buildings and the energy use and gaseous emissions associated with associated environmental control systems. In undertaking its assessments, the system is equipped to model heat, air, moisture and electrical power flows at user determined resolution. The system is designed for the Unix operating system, with supported implementations for Solaris, Linux (SuSE, Ubuntu, etc.), OSX 10.5 and 10.6. It can also be run on Windows in the Cygwin environment, or it can be run in native Windows (XP Vista). ESP-r has a world-wide development community and its distribution is managed under Subversion source code control. The system is made available at no cost under an Open Source licence.