855773520-LEED-v5-ID-C-Reference-Guide-Launch-Edition-1 - Page 086
Extracted Content
Teams must prove a 20% reduction from the baseline water use to meet the minimum prerequisite requirements.
Determining the baseline and design case water use Teams must determine the project’s baseline water consumption. Total annual consumption depends on project-specific data, including fitting and fixture types, flush and flow rates, the number of full-time equivalents and visitors, annual days of operation, and gender ratios. This data must remain consistent across all LEED ID+C: Commercial Interiors credits, to maintain the integrity of the submission.
The total number of uses for each fixture and fitting remains the same in the baseline and design case calculations. The baseline flush and flow rates must use values from Table 2, which represent the maximum allowed flush and flow rates. The design case must use designed values that represent the fixtures and fittings installed in the project. For projects that have dualflush toilets, use the full-flush volume in the design case calculations. Do not use the weighted average.
Develop calculations using the USGBC-approved calculator for this option to determine the percent reduction.
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Minimum Equipment Water Efficiency
During design, teams must identify appliances, kitchen equipment, and processes within the project boundary and specify products that meet the requirements of Tables 3 and 4. Projects in the U.S. and Canada must use ENERGY STAR®-labeled equipment. For international projects, a performance-based equivalent meets the requirement.
ENERGY STAR® - qualified appliances perform better than conventional appliances. For example, ENERGY STAR® washing machines and dishwashers use 30% and 18% less water, respectively, than their conventional counterparts. These appliances also consume 10% to 50% less energy than conventional appliances. [26] Commercial kitchens employ processes that use a high level of energy and water, such as dishwashing and food preparation.
26 “Guide to home water efficiency”, U.S. Department of Energy, accessed March 31, 2025, https://www.energy.gov/sites/prod/files/guide_to_home_water_efficiency.pdf.
U.S. Green Building Council LEED v5 Reference Guide for Interior Design and Construction, April 2025 Launch Edition 75