IEC 63159-1:20 21适用于用于家庭和类似应用的生活热水加热的电即热式热水器，其同时具有以下特性: -满足附件A中的至少一种负载模式； -加热至低于沸腾温度的温度。 本文件规定了能源效率评估的术语、定义和测量方法。 本文件未考虑有关设备安全性的要求。

IEC 63159-1:2021 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.