Retail-NC-v4.1 WEc2: Indoor water use reduction

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emily reese moody

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Jacobs
Sustainability Director, Certifications & Compliance

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Credit language

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 (CS)	Points (Schools, Retail, Hospitality, Healthcare)
25%	1	1	1
30%	2	2	2
35%	3	3	3
40%	4	4	4
45%	5	--	5
50%	6	--	--

Schools, Retail, Hospitality, and Healthcare only 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
Food steamer	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
Combination oven,	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

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Cost estimates for this credit

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Frequently asked questions

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Addenda

4/21/2023 – Updated: 5/9/2023

Reference Guide Correction

Description of change:

Add the following as a second bullet under International Tips:

"o Where local building code conflicts with LEED prescriptive requirements, project teams may select fixtures that comply with local code and compensate by selecting more water-efficient fixtures for other fixture types, provided that the flow rate for the fixture is the lowest allowable by code, and the project meets in aggregate the required 20% reduction from LEED baseline. Provide an excerpt of the local code highlighting the flow rate requirements when submitting for review."

Campus Applicable

Internationally Applicable:

4/9/2021 – Updated: 4/20/2021

Rating System Correction

Description of change:

Revise the intents for both WE prerequisite Indoor Water Use Reduction and WE credit Indoor Water Use Reduction to read as follows:
"To reduce indoor potable water consumption and preserve no and low cost potable water resources."

Campus Applicable

Internationally Applicable:

4/9/2021 – Updated: 4/19/2021

Reference Guide Correction

Description of change:

Below the Further Explanation section titled "Occupant Types" add a new section titled "Campus or Municipal Alternative Water Sources" that reads as follows:

"Campus or Municipal Alternative Water Sources
Projects may count future infrastructure for reclaimed water systems in Water Efficiency credit calculations if:
 the future systems will be functional within 2 years of project occupancy,
 the project provides documentation, such as a signed contract, confirming that the reclaimed water will be provided to the project within a 2-year period from project occupancy, and
 the project provides confirmation that the reclaimed water supplier has agreed to supply the volume of treated wastewater or seawater claimed by the project."

Campus Applicable

Internationally Applicable:

11/9/2020 – Updated: 11/30/2020

Rating System Correction

Description of change:

In the sentence below Table 1. Baseline water consumption of fixtures and fittings, delete the following phrase: "the supply pressure must be consistent in the baseline and proposed case."

Revise the sentence below Table 2. Standards for appliances so that it reads as follows: "*Projects in Europe may install residential appliances meeting the EU A label."

Campus Applicable

Internationally Applicable:

11/10/2020 – Updated: 11/25/2020

Reference Guide Correction

Description of change:

In the International Tips section, delete "+++" in the bullet point that begins "The EU ..." so that the sentence reads as follows:

"The EU A label for residential appliances is an acceptable alternative to ENERGY STAR. The EU Ecodesign and Labelling framework establishes minimum performance standards for the energy and environmental performance of appliances and products."

Campus Applicable

Internationally Applicable:

7/25/2019 – Updated: 7/30/2019

Reference Guide Correction

Description of change:

After the Referenced Standards section in the Further Explanation section, add new section:

"Exemplary Performance
Achieve 55% savings."

Campus Applicable

Internationally Applicable:

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Documentation toolkit

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LEEDuser expert

emily reese moody

LEED AP BD+C, LFA, EcoDistricts AP, ENV SP, Fitwel Ambassador, WEDG Professional, ActiveScore AP, GGP, GPCP, GCP

Jacobs
Sustainability Director, Certifications & Compliance

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Credit language

Requirements

Table 1. Points for reducing water use

Percentage Reduction	Points (BD+C)	Points (CS)	Points (Schools, Retail, Hospitality, Healthcare)
25%	1	1	1
30%	2	2	2
35%	3	3	3
40%	4	4	4
45%	5	--	5
50%	6	--	--

Schools, Retail, Hospitality, and Healthcare only Meet the percentage reduction requirements above. AND

Appliance and Process Water.

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

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
Food steamer	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
Combination oven,	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

LEEDuser expert

emily reese moody

LEED AP BD+C, LFA, EcoDistricts AP, ENV SP, Fitwel Ambassador, WEDG Professional, ActiveScore AP, GGP, GPCP, GCP

Jacobs
Sustainability Director, Certifications & Compliance

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

LEEDuser expert

emily reese moody

Frank advice from LEED experts

Requirements

Table 1. Points for reducing water use

Appliance and Process Water.

Table 2. Compliant commercial washing machines

Table 3. Standards for commercial kitchen equipment

Table 4. Compliant laboratory and medical equipment

Table 5. Compliant municipal steam systems

Cost estimates for this credit

The motherlode of cheat sheets

LEEDuser expert

emily reese moody

LEEDuser’s viewpoint

Get the inside scoop

Credit language

Requirements

Table 1. Points for reducing water use

Appliance and Process Water.

Table 2. Compliant commercial washing machines

Table 3. Standards for commercial kitchen equipment

Table 4. Compliant laboratory and medical equipment

Table 5. Compliant municipal steam systems

LEEDuser expert

emily reese moody