Enter the Domestic Hot Water (DHW) volumetric consumption per unit of floor area per day and the operation schedule.
In DesignBuilder the amount of DHW consumed is considered to be a function of the activity. For example, there is a demand assumed to arise from the occupants of an office for activities such as washing hands and washing up cups. This demand is associated with the office rather than the toilet or tea room. Thus the demand from each space needs to be assigned to a DHW system even if the system itself is not present in the space.