855773644-LEED-v5-BD-C-Reference-Guide-Launch-Edition - Page 179
Extracted Content
Projects that use alternative water sources for irrigation do not automatically comply with this option. Projects must still prove reductions using WEp2: Minimum Water Efficiency, Option 2. Efficient Irrigation .
OPTION 2. EFFICIENT IRRIGATION
For projects with permanent irrigation, teams must design efficient irrigation systems.
For projects with permanent irrigation, teams must demonstrate that the installed irrigation system uses at least 30% less water than the baseline. Calculate the baseline water consumption using the site’s TIR. Projects may use irrigation system efficiencies, plant species selection, or a combination of strategies to achieve the 30% reduction.
DOCUMENTATION
| Project types | Options | Paths | Documentation |
|---|---|---|---|
| All | All | All | Contract document(s) specifying the project’s plumbing fixtures and fittings, including performance specifications. |
| All | All | All | Contract document(s) specifying the project’s appliances, equipment, and process water equipment, including performance specifications. |
| All | All | All | Contract document(s) specifying the project’s commercial kitchen equipment water use, including performance specifications. |
| All | All | All | Contract document(s) specifying the project’s water equipment process, including performance specifications. |
| All | All | All | LEED v5 Fixture and Fittings Efficiency calculator. |
| All | All | All | LEED v5 Minimum Outdoor Water Use Efficiency calculator. |
| All | All | No Irrigation | Documentation confirming that an irrigation system is not installed. |
| All | All | Irrigation System | Evidence that the landscape does not require a permanent irrigation system beyond a maximum two-year establishment period (e.g., a contract document detailing the temporary irrigation methods). |
REFERENCED STANDARDS
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ENERGY STAR® (appliance standards) (energystar.gov/products)
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US Environmental Protection Agency (EPA) Theoretical Irrigation Requirement (TIR) calculation methodology (epa.gov/sites/default/files/202102/documents/watersense_final_technical_evaluation_process_for_home_certification_v1.0. pdf)
U.S. Green Building Council LEED v5 Reference Guide for Building Design and Construction, April 2025 Launch Edition 169