This European Standard specifies methods for testing and reporting of the rating and it specifies requirements for marking of air/water and water/water heat pumps with electrically driven compressors when used for domestic hot water. When these units are used for space heating, then EN 14511, part 1 - 4 applies. This European Standard applies to factory-made units which can be ducted. This European Standard applies only the testing procedure for the domestic hot water production of the heat pump systems. Note: Testing procedures for simultaneous operation for domestic hot water production and space heating are not treated in this standard. In the case of units consisting of several parts, the standard applies only to those designed and supplied as a complete package. This European Standard does not include any requirement about the quality of water.