scope:

This standard specifies the formats to present schedule and condition of zone and space usage, which shall be referred as input data of energy calculations for residential buildings. The schedule and condition include schedules of occupancy, operation of technical building systems, ventilation rate, hot water usage, usage of appliances and internal heat gains due to occupancy, lighting and appliances. The schedule and condition for lighting deals only with fixed installed luminaires and lamps, and movable luminaires and lamps can be dealt with as appliances. This standard also gives categories of residential building, zone and space according to differentiating schedule and condition. When a residential building or its housing unit contains any category of space or zone of non-residential buildings, ISO 18523-1 shall be applied Depending on necessary minuteness of the energy calculation, different levels of schedule and condition from the view point of time and space averaging are specified. The values and categories for the schedule and condition are included informatively. It should be noted that the schedule and condition in this international standard is basically different from assumptions in order to determine the size of technical building systems in the process of design, where possible largest or smallest values should be assumed. Instead, most usual and average values, which are assumed for the building energy calculation, are dealt with in this standard.