A new type of simulation software is introduced which performs sophisticated simulations on the transient thermal, and electrical and hydraulic system behaviour. In comparison to other available software, it can simulate the sensor and controller properties, and also enables hydraulic analysis. It is possible to set or influence the component parameters throughout a simulation. In addition, several open interfaces allow the use of the software in numerous fields of application, such as in particular its implementation in other software. The software core facilitates both a fixed and a variable simulation time step. Individual system configurations can be designed by connecting single components such as in other component-based simulation tools. The program's component library contains 15 validated components. Further components can be modelled or imported by the user if required. The software was validated using TRNSYS 17 as well as analytical considerations, and very good results have been obtained.