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Credit language
© Copyright U.S. Green Building Council, Inc. All rights reserved.
Requirements
Employ strategies that in aggregate use less water than the water use baseline calculated for the building (not including irrigation). The minimum water savings percentage for each point threshold is as follows:
Building Use Reduction |
Process Use Reduction |
Points |
|
30% |
AND |
30% |
2 |
35% |
AND |
35% |
3 |
40% |
AND |
40% |
4 |
Building water use
Calculate the baseline according to the commercial baselines outlined below1. Calculations are based on estimated occupant usage. Include only the following fixtures and fixture fittings (as applicable): water closets, urinals, lavatory faucets, showers, kitchen sink faucets, and pre-rinse spray valves. [Europe ACP: Water Use Baseline]Fixtures, Fittings, and Appliances |
Current Baseline (Imperial Units) |
Current Baseline (Metric Units) |
---|---|---|
Commercial Toilets |
1.6 gallons per flush (gpf)* |
6 liters per flush (lpf) |
Commercial Urinals |
1.0 (gpf) |
4.0 lpf |
Commercial Lavatory (restroom) Faucets |
2.2 gallons per minute (gpm) at 60 pounds per square inch (psi),private applications only (hotel or motel guest rooms, hospital patient rooms) |
8.5 liters per minute (lpm) at 4 bar (58 psi), private applications only (hotel or motel guest rooms, hospital patient rooms) |
Shower |
2.5 (gpm) at 80 (psi) per shower stall |
9.5 lpm at 5.5 bar (80 psi) per shower stall |
Kitchen Faucet |
2.2 (gpm) at 60 (psi) |
8.5 lpm at 4 bar (58 psi) |
Commercial Pre-rinse Spray Valves |
Flow rate ≤ 1.6 (gpm) |
Flow rate ≤ 6 lpm (no pressure specified; no performance requirement) |
* EPAct 1992 standard for toilets applies to both commercial and residential models. |
Commercial water use
Employ strategies that in aggregate use less water than the water use baseline calculated for commercial equipment performance requirements as listed in the following table. Base the calculations on estimated occupant usage. Include only the following fixtures (as applicable): clothes washers, dishwashers, ice machines, food steamers, and combination ovens. Exemptions from calculations:- Appliances and equipment that use water for human consumption may be excluded. Examples: bread misters, produce misters, soda machines, coffee-making machines, and fixtures used to fill sinks for washing produce.
- Equipment, appliances, fixtures, and fittings that are not covered by the Energy Policy Act of 1992 (EPAct 1992), do not contribute toward the retail process, and are not commercially rated may be excluded. Example: a residential dishwasher in an employee break room.
- Fixtures whose flow rates are regulated by health codes may be excluded. Example: fixtures used for filling dishwashing sinks in which water must be maintained at a certain temperature.
Commercial Equipment |
Baseline (Imperial Units) |
Baseline (Metric Units) |
---|---|---|
Commercial clothes washer, less than 80 lbs (36.3 kg) |
9 gallons/cf/cycle |
1,200 liters/m3/cycle |
Commercial dishwasher |
||
Under counter, high temperature |
1.98 gallons/rack |
7.50 liters/rack |
Under counter, low temperature |
1.95 gallons/rack |
7.38 liters/rack |
Door type, high temperature |
1.44 gallons/rack |
5.45 liters/rack |
Door type, low temperature |
1.85 gallons/rack |
7.00 liters/rack |
Single tank rack conveyor, high temperature |
1.13 gallons/rack |
4.28 liters/rack |
Single tank rack conveyor, low temperature |
1.23 gallons/rack |
4.66 liters/rack |
Multi- tank rack conveyor, high temperature |
1.1 gallons/rack |
4.16 liters/rack |
Multi- tank rack conveyor, low temperature |
0.99 gallon/rack |
3.75 liters/rack |
Flight type |
180 gph |
681.37 lph |
Commercial ice machines |
||
Ice machine, IMH (ice-making head) H |
||
Ice machine, IMH (ice-making head) H > 450 lbs/day (>204.11 kg/day) |
||
Ice machine, RCU (no remote compressor) H |
||
Ice machine, RCU (no remote compressor) H > 1,000 lbs/day (>453.59 kg/day) |
||
Ice machine, RCU (remote compressor) H |
||
Ice machine, RCU (remote compressor) H > 934 lbs/day (>423.66 kg/day) |
||
Ice machine, SCU (self-contained unit) |
||
Ice machine, water-cooled |
Must be on chilled loop |
Must be on chilled loop |
Ice machine, once-through water-cooled |
Banned |
Banned |
Food steamer |
||
Steam cooker, batch cooking |
8 gph/pan |
3085.11 lph/pan |
Steam cooker, high production or cook to order |
8 gph/pan |
317.97 lph/pan |
Combination oven |
|
|
Countertop or stand mounted |
40 gph |
151.42 lph |
Roll-in |
60 gph |
227.12 lph |
Other equipment |
Based on industry standards |
Based on industry standards |
Notes: gph = gallons per hour; cf = cubic feet; lph = liters per hour; H = ice production. |
Alternative Compliance Paths (ACPs)
Europe ACP: Water Use Baseline
Projects in Europe may use the values defined by European Standards. See all forum discussions about this credit »What does it cost?
Cost estimates for this credit
On each BD+C v4 credit, LEEDuser offers the wisdom of a team of architects, engineers, cost estimators, and LEED experts with hundreds of LEED projects between then. They analyzed the sustainable design strategies associated with each LEED credit, but also to assign actual costs to those strategies.
Our tab contains overall cost guidance, notes on what “soft costs” to expect, and a strategy-by-strategy breakdown of what to consider and what it might cost, in percentage premiums, actual costs, or both.
This information is also available in a full PDF download in The Cost of LEED v4 report.
Learn more about The Cost of LEED v4 »Frequently asked questions
See all forum discussions about this credit »Documentation toolkit
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© Copyright U.S. Green Building Council, Inc. All rights reserved.
Requirements
Employ strategies that in aggregate use less water than the water use baseline calculated for the building (not including irrigation). The minimum water savings percentage for each point threshold is as follows:
Building Use Reduction |
Process Use Reduction |
Points |
|
30% |
AND |
30% |
2 |
35% |
AND |
35% |
3 |
40% |
AND |
40% |
4 |
Building water use
Calculate the baseline according to the commercial baselines outlined below1. Calculations are based on estimated occupant usage. Include only the following fixtures and fixture fittings (as applicable): water closets, urinals, lavatory faucets, showers, kitchen sink faucets, and pre-rinse spray valves. [Europe ACP: Water Use Baseline]Fixtures, Fittings, and Appliances |
Current Baseline (Imperial Units) |
Current Baseline (Metric Units) |
---|---|---|
Commercial Toilets |
1.6 gallons per flush (gpf)* |
6 liters per flush (lpf) |
Commercial Urinals |
1.0 (gpf) |
4.0 lpf |
Commercial Lavatory (restroom) Faucets |
2.2 gallons per minute (gpm) at 60 pounds per square inch (psi),private applications only (hotel or motel guest rooms, hospital patient rooms) |
8.5 liters per minute (lpm) at 4 bar (58 psi), private applications only (hotel or motel guest rooms, hospital patient rooms) |
Shower |
2.5 (gpm) at 80 (psi) per shower stall |
9.5 lpm at 5.5 bar (80 psi) per shower stall |
Kitchen Faucet |
2.2 (gpm) at 60 (psi) |
8.5 lpm at 4 bar (58 psi) |
Commercial Pre-rinse Spray Valves |
Flow rate ≤ 1.6 (gpm) |
Flow rate ≤ 6 lpm (no pressure specified; no performance requirement) |
* EPAct 1992 standard for toilets applies to both commercial and residential models. |
Commercial water use
Employ strategies that in aggregate use less water than the water use baseline calculated for commercial equipment performance requirements as listed in the following table. Base the calculations on estimated occupant usage. Include only the following fixtures (as applicable): clothes washers, dishwashers, ice machines, food steamers, and combination ovens. Exemptions from calculations:- Appliances and equipment that use water for human consumption may be excluded. Examples: bread misters, produce misters, soda machines, coffee-making machines, and fixtures used to fill sinks for washing produce.
- Equipment, appliances, fixtures, and fittings that are not covered by the Energy Policy Act of 1992 (EPAct 1992), do not contribute toward the retail process, and are not commercially rated may be excluded. Example: a residential dishwasher in an employee break room.
- Fixtures whose flow rates are regulated by health codes may be excluded. Example: fixtures used for filling dishwashing sinks in which water must be maintained at a certain temperature.
Commercial Equipment |
Baseline (Imperial Units) |
Baseline (Metric Units) |
---|---|---|
Commercial clothes washer, less than 80 lbs (36.3 kg) |
9 gallons/cf/cycle |
1,200 liters/m3/cycle |
Commercial dishwasher |
||
Under counter, high temperature |
1.98 gallons/rack |
7.50 liters/rack |
Under counter, low temperature |
1.95 gallons/rack |
7.38 liters/rack |
Door type, high temperature |
1.44 gallons/rack |
5.45 liters/rack |
Door type, low temperature |
1.85 gallons/rack |
7.00 liters/rack |
Single tank rack conveyor, high temperature |
1.13 gallons/rack |
4.28 liters/rack |
Single tank rack conveyor, low temperature |
1.23 gallons/rack |
4.66 liters/rack |
Multi- tank rack conveyor, high temperature |
1.1 gallons/rack |
4.16 liters/rack |
Multi- tank rack conveyor, low temperature |
0.99 gallon/rack |
3.75 liters/rack |
Flight type |
180 gph |
681.37 lph |
Commercial ice machines |
||
Ice machine, IMH (ice-making head) H |
||
Ice machine, IMH (ice-making head) H > 450 lbs/day (>204.11 kg/day) |
||
Ice machine, RCU (no remote compressor) H |
||
Ice machine, RCU (no remote compressor) H > 1,000 lbs/day (>453.59 kg/day) |
||
Ice machine, RCU (remote compressor) H |
||
Ice machine, RCU (remote compressor) H > 934 lbs/day (>423.66 kg/day) |
||
Ice machine, SCU (self-contained unit) |
||
Ice machine, water-cooled |
Must be on chilled loop |
Must be on chilled loop |
Ice machine, once-through water-cooled |
Banned |
Banned |
Food steamer |
||
Steam cooker, batch cooking |
8 gph/pan |
3085.11 lph/pan |
Steam cooker, high production or cook to order |
8 gph/pan |
317.97 lph/pan |
Combination oven |
|
|
Countertop or stand mounted |
40 gph |
151.42 lph |
Roll-in |
60 gph |
227.12 lph |
Other equipment |
Based on industry standards |
Based on industry standards |
Notes: gph = gallons per hour; cf = cubic feet; lph = liters per hour; H = ice production. |