本欧洲标准由两部分组成。 第一部分补充EN 303 1，EN 303 2，EN 303 4和EN 304，以下称为锅炉标准。具体规定了燃油热水器和组合锅炉的家用热水运行的施工安全，能源合理使用，适用性，分类和标记的补充要求和试验。 家用热水以瞬时或储存原理生产。国内热水生产相结合，整体销售为一体。 第二部分涵盖了第一部分覆盖的家用电器的家用热水生产的能源性能。 第二部分列出了评估电器能量性能的方法。它定义了每个家庭热水使用如厨房，淋浴，浴缸以及这些的组合的每日自来水循环次数，以及相应的测试程序，使得组合锅炉和热水器的能量性能能够与用户的需求。 本标准涵盖的设备的热量输出不超过400 kW。 在组合锅炉的情况下，有或没有储罐，家用热水生产是一体化的

This document is composed of two parts. The first part supplements EN 303-1, EN 303-2, EN 303-4 and EN 304, hereafter called boiler standards. It specifies the supplementary requirements and tests for the construction, safety, rational use of energy, fitness for purpose, classification and marking related to the domestic hot water operation of oil-fired water heaters and combination boilers. The domestic hot water is produced on either the instantaneous or storage principle. The domestic hot water production is integrated or coupled, the whole being marketed as a single unit. The second part covers the energy performance of domestic hot water production of the appliances covered by the first part. This second part sets out a method for assessing the energy performance of the appliances. It defines a number of daily tapping cycles for each domestic hot water use such as kitchen, shower, bath and a combination of these, together with corresponding test procedures, enabling the energy performances of combination boilers and water heaters to be compared and matched to the needs of the user. The heat output of the appliances covered by this standard does not exceed 400 kW. In the case of combination boilers, with or without storage tank, domestic hot water production is integrated or coupled, the whole being marketed as a single unit. This standard only covers type testing.