GB/T 50378-2019 第8.1.3条
| **** | **Control item**: Measures shall be taken to conserve water. MEP systems shall use water-saving fixtures (e.g., sanitary fixtures with a water efficiency grade of not less than Grade 2) and be provided with tiered water metering devices (e.g., sub-metering for guest rooms, public areas, kitchens, laundries, etc.). |