LEED Qualification Guide
How to meet LEED v4
Sloan is committed to global water conservation and helps our customers worldwide to meet the water and energy challenges of growing businesses, municipalities and communities.
USGBC’s LEED v4 contains several updates from its predecessor LEED 2009. However the intent of the Water Efficiency (W.E.) section remains the same — to reduce a buildings consumption of potable water. The W.E. section consists of three main components: indoor water (used by fixtures, appliances, and processes), outdoor irrigation water, and total building water metering. Within this section are three prerequisites that specifically requires indoor and outdoor water reductions in addition to documenting the buildings water use. The four W.E. credits rewards a building for achieving specific potable water reduction milestones above the baseline.
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|LEED Credit||Intent||Requirement||Sloan Solution|
W.E. Prerequisite 2
Indoor Water Use Reduction
|To reduce indoor water consumption.||Reduce aggregate water consumption 20% from the baseline.||Sloan HET's & HEU's Sensor faucets 1.28, 1.1 and Reclaimed Water flushometers Pint, Waterfree and Hybrid Urinals.|
W.E. Credit 2
Indoor Water Use Reduction (1 to 6 points possible)
|To reduce indoor water consumption by greater that 20% above the baseline.||Reduce fixture and fitting water use by at least 25% and up to potentially 50%. Points are awarded based on percent reduction achieved.||Sloan HET's & HEU's Sensor faucets 1.28, 1.1 and Reclaimed Water flushometers Pint, Waterfree and Hybrid Urinals.|
W.E. Prerequisite 3
|To support water management and identify opportunities for additional water savings by tracking water consumption.||Install permanent water meters that measure the total potable water use for the building and associated grounds and commit to sharing the data with USGBC for a period of 5 years.||SMS|
W.E. Credit 4
Water Metering (1 point)
|To support water management and identify opportunities for additional water savings by tracking water consumption.||Install permanent water meters for two or more of the following water subsystems: Irrigation, Indoor plumbing fixtures and fittings, domestic hot water, boilers, reclaimed water and other process water.||SMS|
BD+C WEp2: Indoor Water Use ReductionThis prerequisite was formerly called the Water Use Reduction prerequisite in LEED 2009. LEED v4’s WE Prerequisite 2 requires the aggregate indoor water consumption be reduced by 20 percent from the baseline. Table 1 identifies the baseline water consumption to be used for various fittings and fixtures when calculating a building’s baseline indoor water use. A v4 update mandates that all newly installed fittings and fixtures that are eligible for the WaterSense label, must have a WaterSense label (or a local equivalent for projects outside the U.S.). The WaterSense label ensures that the fixtures utilized in a LEED building meet both water efficient and high performance testing standards.
|Fixture or Fitting||Baseline IP Units||Baseline SI Units|
|Water Closet (Toilet)*||1.60 gallons per flush||6.00 liters per flush|
|Urinal*||1.00 gallons per flush||3.80 liters per flush|
|Public Lavatory Faucet||0.50 gallons/min at 60 psi||1.90 liters/min at 415 kPa|
|Showerhead*||2.50 gallons/min at 80 psi||9.50 liters/min at 415 kPa|
*WaterSense label available for this product type.