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LEED v4
Retail – New Construction
Water Efficiency
Indoor water use reduction

LEED CREDIT

Retail-NC-v4 WEc2: Indoor water use reduction 1-7 points

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SPECIAL REPORT

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emily reese

LEED AP BD+C, GGP, GPCP, ENV SP, Fitwel Ambassador, GCP

Jacobs
Senior Sustainability Coordinator

SPECIAL REPORT

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Credit language

USGBC logo

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

Intent

To reduce indoor water consumption.

Requirements

Further reduce fixture and fitting water use from the calculated baseline in WE Prerequisite Indoor Water Use Reduction. Additional potable water savings can be earned above the prerequisite level using alternative water sources. Include fixtures and fittings necessary to meet the needs of the occupants. Some of these fittings and fixtures may be outside the tenant space (for Commercial Interiors) or project boundary (for New Construction). Points are awarded according to Table 1.

Table 1. Points for reducing water use

Percentage reduction Points (BD&C) Points (Schools, Retail, Hospitality, Healthcare) Points (ID&C) Points (CI Retail) Points (CI Hospitality)
25% 1 1 2 2 2
30% 2 2 4 4 4
35% 3 3 6 6 6
40% 4 4 8 8 8
45% 5 5 10 10 10
50% 6 -- 12 -- 11

Meet the percentage reduction requirements above.

AND
Appliance and process water

Install equipment within the project scope that meets the minimum requirements in Table 2, 3, 4, or 5 . One point is awarded for meeting all applicable requirements in any one table. All applicable equipment listed in each table must meet the standard.

Schools, Retail, and Healthcare projects can earn a second point for meeting the requirements of two tables.

Table 2. Compliant commercial washing machines

To use Table 2, the project must process at least 120,000 lbs (57 606 kg) of laundry per year.

Washing machine Requirement (IP units) Requirement (SI units)
On-premise, minimum capacity 2,400 lbs (10 886 kg) per 8-hour shift Maximum 1.8 gals per pound * Maximum 7 liters per 0.45 kilograms *

* Based on equal quantities of heavy, medium, and light soil laundry.

Table 3. Standards for commercial kitchen equipment

To use Table 3, the project must serve at least 100 meals per day of operation. All process and appliance equipment listed in the category of kitchen equipment and present on the project must comply with the standards.

Kitchen equipment Requirement (IP units) Requirement (SI units)
Dishwasher Undercounter ENERGY STAR ENERGY STAR or performance equivalent
 Stationary, single tank, door ENERGY STAR ENERGY STAR or performance equivalent
Single tank, conveyor ENERGY STAR ENERGY STAR or performance equivalent
Multiple tank, conveyor ENERGY STAR ENERGY STAR or performance equivalent
Flight machine ENERGY STAR ENERGY STAR or performance equivalent
Food steamer Batch (no drain connection) ≤ 2 gal/hour/pan including condensate cooling water ≤ 7.5 liters/hour/pan including condensate cooling water
Cook-to-order (with drain connection) ≤ 5 gal/hour/pan including condensate cooling water ≤ 19 liters/hour/pan including condensate cooling water
Combination oven, Countertop or stand ≤ 1.5 gal/hour/panincluding condensate cooling water ≤ 5.7 liters/hour/pan including condensate cooling water
Roll-in ≤ 1.5 gal/hour/pan including condensate cooling water ≤ 5.7 liters/hour/pan including condensate cooling water
Food waste disposer Disposer 3-8 gpm, full load condition; 10 minute automatic shutoff or 1 gpm, no-load condition 11–30 lpm, full load condition; 10-min automatic shutoff or 3.8 lpm, no-load condition
Scrap collector Maximum 2 gpm makeup water Maximum 7.6 lpm makeup water
Pulper Maximum 2 gpm makeup water Maximum 7.6 lpm makeup water
Strainer basket No additional water usage No additional water usage

gpm = gallons per minute
gph = gallons per hour
lpm = liters per minute
lph = liters per hour

Table 4. Compliant laboratory and medical equipment

To use Table 4, the project must be a medical or laboratory facility.

Lab equipment Requirement (IP units) Requirement (SI units)
Reverse-osmosis water purifier 75% recovery 75% recovery
Steam sterilizer For 60-inch sterilizer, 6.3 gal/U.S. tray
For 48-inch sterilizer, 7.5 gal/U.S. tray
For 1520-mm sterilizer, 28.5 liters/DIN tray
For 1220-mm sterilizer, 28.35 liters/DIN tray
Sterile process washer 0.35 gal/U.S. tray 1.3 liters/DIN tray
X-ray processor, 150 mm or more in any dimension Film processor water recycling unit
Digital imager, all sizes No water use
Table 5. Compliant municipal steam systems

To use Table 5, the project must be connected to a municipal or district steam system that does not allow the return of steam condensate.

Steam system Standard
Steam condensate disposal Cool municipally supplied steam condensate (no return) to drainage system with heat recovery system or reclaimed water
OR
Reclaim and use steam condensate 100% recovery and reuse
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

Our plumbing fixtures are served, in part, by nonpotable water. How do we account for this?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

See all forum discussions about this credit »

Documentation toolkit

The motherlode of cheat sheets

LEEDuser’s Documentation Toolkit is loaded with calculators to help assess credit compliance, tracking spreadsheets for materials, sample templates to help guide your narratives and LEED Online submissions, and examples of actual submissions from certified LEED projects for you to check your work against. To get your plaque, start with the right toolkit.

LEEDuser expert

emily reese

LEED AP BD+C, GGP, GPCP, ENV SP, Fitwel Ambassador, GCP

Jacobs
Senior Sustainability Coordinator

Get the inside scoop

Our editors have written a detailed analysis of nearly every LEED credit, and LEEDuser premium members get full access. We’ll tell you whether the credit is easy to accomplish or better left alone, and we provide insider tips on how to document it successfully.

USGBC logo

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

Intent

To reduce indoor water consumption.

Requirements

Further reduce fixture and fitting water use from the calculated baseline in WE Prerequisite Indoor Water Use Reduction. Additional potable water savings can be earned above the prerequisite level using alternative water sources. Include fixtures and fittings necessary to meet the needs of the occupants. Some of these fittings and fixtures may be outside the tenant space (for Commercial Interiors) or project boundary (for New Construction). Points are awarded according to Table 1.

Table 1. Points for reducing water use

Percentage reduction Points (BD&C) Points (Schools, Retail, Hospitality, Healthcare) Points (ID&C) Points (CI Retail) Points (CI Hospitality)
25% 1 1 2 2 2
30% 2 2 4 4 4
35% 3 3 6 6 6
40% 4 4 8 8 8
45% 5 5 10 10 10
50% 6 -- 12 -- 11

Meet the percentage reduction requirements above.

AND
Appliance and process water

Install equipment within the project scope that meets the minimum requirements in Table 2, 3, 4, or 5 . One point is awarded for meeting all applicable requirements in any one table. All applicable equipment listed in each table must meet the standard.

Schools, Retail, and Healthcare projects can earn a second point for meeting the requirements of two tables.

Table 2. Compliant commercial washing machines

To use Table 2, the project must process at least 120,000 lbs (57 606 kg) of laundry per year.

Washing machine Requirement (IP units) Requirement (SI units)
On-premise, minimum capacity 2,400 lbs (10 886 kg) per 8-hour shift Maximum 1.8 gals per pound * Maximum 7 liters per 0.45 kilograms *

* Based on equal quantities of heavy, medium, and light soil laundry.

Table 3. Standards for commercial kitchen equipment

To use Table 3, the project must serve at least 100 meals per day of operation. All process and appliance equipment listed in the category of kitchen equipment and present on the project must comply with the standards.

Kitchen equipment Requirement (IP units) Requirement (SI units)
Dishwasher Undercounter ENERGY STAR ENERGY STAR or performance equivalent
 Stationary, single tank, door ENERGY STAR ENERGY STAR or performance equivalent
Single tank, conveyor ENERGY STAR ENERGY STAR or performance equivalent
Multiple tank, conveyor ENERGY STAR ENERGY STAR or performance equivalent
Flight machine ENERGY STAR ENERGY STAR or performance equivalent
Food steamer Batch (no drain connection) ≤ 2 gal/hour/pan including condensate cooling water ≤ 7.5 liters/hour/pan including condensate cooling water
Cook-to-order (with drain connection) ≤ 5 gal/hour/pan including condensate cooling water ≤ 19 liters/hour/pan including condensate cooling water
Combination oven, Countertop or stand ≤ 1.5 gal/hour/panincluding condensate cooling water ≤ 5.7 liters/hour/pan including condensate cooling water
Roll-in ≤ 1.5 gal/hour/pan including condensate cooling water ≤ 5.7 liters/hour/pan including condensate cooling water
Food waste disposer Disposer 3-8 gpm, full load condition; 10 minute automatic shutoff or 1 gpm, no-load condition 11–30 lpm, full load condition; 10-min automatic shutoff or 3.8 lpm, no-load condition
Scrap collector Maximum 2 gpm makeup water Maximum 7.6 lpm makeup water
Pulper Maximum 2 gpm makeup water Maximum 7.6 lpm makeup water
Strainer basket No additional water usage No additional water usage

gpm = gallons per minute
gph = gallons per hour
lpm = liters per minute
lph = liters per hour

Table 4. Compliant laboratory and medical equipment

To use Table 4, the project must be a medical or laboratory facility.

Lab equipment Requirement (IP units) Requirement (SI units)
Reverse-osmosis water purifier 75% recovery 75% recovery
Steam sterilizer For 60-inch sterilizer, 6.3 gal/U.S. tray
For 48-inch sterilizer, 7.5 gal/U.S. tray
For 1520-mm sterilizer, 28.5 liters/DIN tray
For 1220-mm sterilizer, 28.35 liters/DIN tray
Sterile process washer 0.35 gal/U.S. tray 1.3 liters/DIN tray
X-ray processor, 150 mm or more in any dimension Film processor water recycling unit
Digital imager, all sizes No water use
Table 5. Compliant municipal steam systems

To use Table 5, the project must be connected to a municipal or district steam system that does not allow the return of steam condensate.

Steam system Standard
Steam condensate disposal Cool municipally supplied steam condensate (no return) to drainage system with heat recovery system or reclaimed water
OR
Reclaim and use steam condensate 100% recovery and reuse

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 »

In the end, LEED is all about documentation. LEEDuser’s Documentation Toolkit, for premium members only, saves you time and helps you avoid mistakes with:

  • Calculators to help assess credit compliance.
  • Tracking spreadsheets for materials purchases.
  • Spreadsheets and forms to give to subs and other team members.
  • Guidance documents on arcane LEED issues.
  • Sample templates to help guide your narratives and LEED Online submissions.
  • Examples of actual submissions from certified LEED projects.

Our plumbing fixtures are served, in part, by nonpotable water. How do we account for this?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

LEEDuser expert

emily reese

LEED AP BD+C, GGP, GPCP, ENV SP, Fitwel Ambassador, GCP

Jacobs
Senior Sustainability Coordinator

See all LEEDuser forum discussions about this credit » Subscribe to new discussions about Retail-NC-v4 WEc2