ESP-r is a whole building energy simulation program for integrated modelling of building energy performance. The primary application of the program is to support researchers undertaking detailed studies, but it is also used in teaching and design practice, and has been embedded in a number of focused design tools (e.g. for stock modelling). Heat, air, moisture, light and electrical power flows can be simulated at user specified spatial and temporal resolution. ESP-r has a number of developers world-wide and its distribution is managed under GitHub source code control. The system is made available at no cost under an Open Source licence. It has been subject to numerous large-scale IEA and EC validation projects.
Some examples of the high resolution capabilities of ESP-r are: