scope:

This document specifies a method for the energy assessment of domestic/sanitary hot water storage tanks of up to 2 000 l.

Whilst this document does not cover water heaters intended primarily for direct heating, it does allow the provision of electric heating elements for auxiliary use.

Primary heating buffer tanks are not covered by this document. Heat losses of domestic hot water storage tanks integrated into combi boilers marketed as a single unit are not covered by this document.