855773520-LEED-v5-ID-C-Reference-Guide-Launch-Edition-1 - Page 101

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consumption by 30% and uses an alternative water source to achieve those reductions earn two points.

Projects should always prioritize water efficiency first to reduce consumption and demand before applying alternative water solutions. For any seasonally dependent sources, such as rainwater, calculations must reflect annual, seasonal totals to confirm the available quantity of the alternative water source.

Projects pursuing Options 2–4 Projects may earn up to eight points by combining strategies from Options 2–4. Projects with limited scope or projects that use targeted reductions by equipment or system type, should review Option 1 and all relevant Options 2–4 to determine the approach that maximizes points for this credit.

Option 2. Fixtures and Fittings — Calculated Reduction

Option 2 focuses on reducing potable water use from fixtures and fittings. Using the baseline and designed water usage calculations determined from WEp1: Minimum Water Efficiency, Minimum Fixture and Fittings Efficiency, Path 2: Performance Path – Calculated Reduction, projects earn points for additional savings beyond the 20% requirement, based on specific fixture flow and flush rates. Savings must be calculated using a USGBC-approved calculator. Projects achieving a 25% reduction earn one point.

Along with the use of high-efficiency fixtures and fittings, projects that use alternative water sources for these systems can report further savings and achieve additional points under this option.

AND/OR

Option 3. Appliance and Process Water

Option 3 rewards projects that prioritize water-efficient appliances and process equipment. Projects earn one point for meeting prescriptive water use requirements in a single equipment category, for up to two total points.

Tables 3–5 outline the prescriptive measures for appliances and process equipment. All newly installed equipment must meet the referenced standards, performance equivalents (outside of the U.S.), and/or water use limits. Existing appliances and equipment should be excluded.

Projects that do not include any applicable systems in their scope of work or projects that can document compliance with more than two tables, should review the whole project’s water

U.S. Green Building Council LEED v5 Reference Guide for Interior Design and Construction, April 2025 Launch Edition 90