self._dhw_peak_flow_rate = (building.thermal_zones_from_internal_zones[0].total_floor_area *
File "C:\Users\a_gabald\Desktop\New folder\energy_system_modelling_workflow\hub\city_model_structure\building.py", line 135, in thermal_zones_from_internal_zones
if internal_zone.thermal_zones_from_internal_zones is None:
File "C:\Users\a_gabald\Desktop\New folder\energy_system_modelling_workflow\hub\city_model_structure\building_demand\internal_zone.py", line 135, in thermal_zones_from_internal_zones