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LEED v2009
Schools
Water Efficiency
Process water use reduction

LEED CREDIT

Schools-2009 WEc4: Process water use reduction 1 point

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Credit achievement rate

XX%

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Credit language

USGBC logo

© Copyright U.S. Green Building Council, Inc. All rights reserved.

Intent

To maximize water efficiency within buildings to reduce the burden on municipal water supply and wastewater systems.

Requirements

To receive this credit, buildings must have the following:

  • No refrigeration equipment using once-through cooling with potable water
  • No garbage disposals
  • All appliances within at least 4 equipment types where water use is at or below the levels shown in the table below. Inclusion of any equipment not listed in the table below must be supported by documentation showing a 20% reduction in water use from a benchmark or industry standard.

Equipment Type Maximum Water Use (Imperial units) Maximum Water Use (Metric units) Other Requirements
Clothes Washers* 7.5 gallons/ft3/cycle 12 liters/kg wash load  
Dishwashers with racks 1.0 gallons/rack 4.0 liters/rack  
Ice machines** lbs/day>175
20 gallons/100lbs
kg/day>80
75 liters/45 kg
No water-cooled machines
lbs/day<175
30 gallons/100/lbs
lbs/day<175
30 gallons/100/lbs
No water-cooled machines
Food steamers 2 gallons/hour 8 liters/hour Boilerless steamers only
Prerinse spray valves 1.4 gallons per minute 5.3 liters per minute  
* Commercial CEE Tier 3a—Residential CEE Tier 1
** CEE Tier 3
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Credit achievement rate

XX%

Upgrade to LEEDuser Premium to see how many projects achieved this credit. Try it free »

USGBC logo

© Copyright U.S. Green Building Council, Inc. All rights reserved.

Intent

To maximize water efficiency within buildings to reduce the burden on municipal water supply and wastewater systems.

Requirements

To receive this credit, buildings must have the following:

  • No refrigeration equipment using once-through cooling with potable water
  • No garbage disposals
  • All appliances within at least 4 equipment types where water use is at or below the levels shown in the table below. Inclusion of any equipment not listed in the table below must be supported by documentation showing a 20% reduction in water use from a benchmark or industry standard.

Equipment Type Maximum Water Use (Imperial units) Maximum Water Use (Metric units) Other Requirements
Clothes Washers* 7.5 gallons/ft3/cycle 12 liters/kg wash load  
Dishwashers with racks 1.0 gallons/rack 4.0 liters/rack  
Ice machines** lbs/day>175
20 gallons/100lbs
kg/day>80
75 liters/45 kg
No water-cooled machines
lbs/day<175
30 gallons/100/lbs
lbs/day<175
30 gallons/100/lbs
No water-cooled machines
Food steamers 2 gallons/hour 8 liters/hour Boilerless steamers only
Prerinse spray valves 1.4 gallons per minute 5.3 liters per minute  
* Commercial CEE Tier 3a—Residential CEE Tier 1
** CEE Tier 3

XX%

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