IEC 63159-1 Ed. 1.0 b:2021

This document applies to electric instantaneous water heaters for domestic hot water heating for household and similar applications, which show both of the following characteristics:

- fulfilling at least one load pattern from Annex A;
- heating up to temperatures below the boiling temperature.

This document specifies terms, definitions and measurement methods for the assessment of energy efficiency.

This document does not take into account requirements regarding the safety of the appliances.