855773667-LEED-v5-O-M-Reference-Guide-Launch-Edition-1 - Page 107
Extracted Content
INDOOR PLUMBING FIXTURES AND FITTINGS
Water closets, urinals, lavatories, breakroom faucets, showerheads, and kitchen faucets must be included within the metered water systems serving at least 80% of the indoor plumbing fixtures and fittings, either directly or by deducting all other measured water use from the measured total water consumption of the building and grounds. Equation 2. Fixtures (Number of metered indoor �ixtures and �ittings)/(Total number of indoor �ixtures) ≥ 0.8
DOMESTIC HOT WATER
Domestic hot water heating systems accounted for within the calculations must include both tanks and on demand heaters.
Equation 3. Domestic hot water
(Heating capacity of metered domestic water heating units) / (Total heating capacity of all domestic Equation 3. Domestic hot water
water heating units ≥ 0.8 OTHER PROCESS WATER
Process water systems include, but are not limited to, humidifiers, dishwashers, laundry facilities, and pools, including swimming pools and landscape water features. Each application is unique. Identify project-specific process end-uses applicable to the building, and meter at least 80% of the expected daily water consumption.
Equation 4. Other process water
(Daily metered gallons, or liters, for process-type end uses)/(Total expected daily gallons, or liters, Equation 4. Other process water
for process-type end uses) ≥ 0.8
Meter Equipment and Recording Requirements — All Subsystems
Submeters may be manually read or connected to a building information system. The meters may be equipped with data logging capability independent of a building information system.
Calibrate all project-owned meters per the manufacturer’s recommended intervals. Regularly calibrating meters allows for accurate data reporting and analysis.
Record water consumption at least weekly. Compile data into monthly and annual summaries for each subsystem to perform time trend analysis on all water-consuming systems. Regular reviews of the time-trended water data help identify anomalies and allow facility managers to act
U.S. Green Building Council LEED v5 Reference Guide for Operations and Maintenance, April 2025 Launch Edition 97