This European Prestandard specifies requirements on durability, reliability and safety of small and large custom built solar heating systems with liquid heat transfer medium for residential buildings and similar applications. The Prestandard contains also requirements on the design process of large custom built systems.
BS DD ENV 12977-1:2001 history
2012BS EN 12977-1:2012 Thermal solar systems and components. Custom built systems. General requirements for solar water heaters and combisystems
2010BS DD CEN/TS 12977-1:2010 Thermal solar systems and components - Custom built systems - General requirements for solar water heaters and combisystems
2001BS DD ENV 12977-1:2001 Thermal solar systems and components - Custom built systems - General requirements