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15 Cards in this Set
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LEED WE Prerequisites & Credits (3&4) |
P1: outdoor water use reduction P2: indoor water use reduction P3: building level water metering C1: outdoor water use reduction C2: indoor water use reduction C3: cooling tower water use C4: water metering |
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WE Prerequisite 1: outdoor water use reduction |
OPT 1: no irrigation required OPT 2: reduced irrigation by at least 30% from baseline’s peak watering month |
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WE Prerequisite 2: indoor water use reduction |
Reduce indoor water consumption by 20% from baseline (1992 energy policy act) Toilet 1.6 gpf Urinal 1 gpf Public restroom faucet 0.5 gpm at 60psi Private restroom faucet 2.2 gpm at 60psi Kitchen faucet 2.2 gpm at 60psi Shower head 2.5 gpm at 80psi |
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WE Prerequisite 3: Building Level Water Metering |
Installing permanent water metering that measures total potable water use for the building and associated grounds. Commit to sharing data w LEED for five years. |
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WE Credit 1: Outdoor water use reduction |
OPT. 1: No outdoor irrigation 100% reduction - 2 points OPT. 2: reduce the projects landscape water requirement (LWR) by at least 50% from calculated baseline - 1 point
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WE Credit 2: Indoor water use reduction |
Percentage Reduction / points 25% / 1pt 30% / 2pt 35% / 3pt 40% / 4pt 45% / 5pt 50% / 6pt |
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WE Credit 3: Cooling tower water use |
For cooking towers and evaporative condensers, conduct a one time potable water analysis. Installing submerses I’m cooking towers may help to reduce water by providing real time feedback on usage. |
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WE Credit 4: Water metering |
Install permanent water meter for two or more: -irrigation -indoor plumbing fixture -domestic hot water -boilers -reclaimed water -other process water |
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Vegetative roof benifits |
-durability -acoustic benefit -energy efficiency -heat island reduction -stormwater management -outdoor water reduction -provides open space |
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Evapotranspiration rate |
The amount of water lost from a vegetated surface expressed in mm per unit of time |
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Black water |
Water that comes from toilets and urinals |
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Greywater |
Untreated wastewater that has not come in contact w toilet waste: -bathtubs -showers -bathroom sinks -laundry machines Kitchen sinks and dishwashers do not count. |
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Process water |
Used for industrial processes and building systems such as dishwashers, clothes washers, ice machines, cooling towers, boilers, chillers |
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Low flow plumbing fixtures |
-Ultra low flow WC (1.28gpf) includes a pressure tank to produce a pressure assisted or vacuum assisted flush -Dual flush WC (0.8-1.0 for liquid waste; 1.28-1.6gpf for solid) -Ultra low flow urinals (0.125gpf) uses an optimized valve that produces pressure assisted flush -Low flow aerators for faucets (50% water reduction) uses a flow restrictor to reduce water flow and a mixer to increase air in the water |
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Full time equivalent (FTE) |
Designation of a building occupants who spends 40 hours per week in the project building. Transient occupants are calculated by their weekly hours divided by 40. |
