This European Prestandard applies to small and large custom built solar heating systems with liquid heat transfer medium for residential buildings and similar applications,and fives test methods for verification of the requirements specified in ENV 12977-1.
This Prestandard includes also a method for thermal performance characterization and system performance prediction of small custom built systems by means of component testing and system simulation.
Furthermore,the Prestandard contains methods for thermal performance characterization and system performance prediction of large custom built systems.