DIN EN 50193-2-1-2017 快热式电热水器. 第2-1部分: 性能测量方法. 多功能快热式电热水器; 德文版本EN 50193-2-1-2016
Electric instantaneous water heaters - Part 2-1: Methods for measuring the performance - Multifunctional electric instantaneous water heaters; German version EN 50193-2-1:2016