scope:

This standard contains the calculations of the energy demand for heating drinking water. It presents effective hot water energy demands for personal hygiene and hygiene around the home and therefore serves as a basis for comparative cost accounting in the energy supply industry.

Every figure relating to energy demand is associated with a process (e. g. total body cleaning) and with an appliance (e. g. shower) and therefore an appropriate distinction is also made in Table 1 in Section 4. Although belonging to the user establishment, the drawoff tap (manually controlled as a single or doublelever mixer or thermostatically controlled) does not influence the effective energy demand, but does influence the expenditure of energy during the transfer of utility. Therefore the type of draw-off tap is not taken into consideration as a further possible criterion.