CI-2009 WEpc18: Appliance and process water use reduction

  • Modified from process water credit found in LEED for Schools

    This prerequisite and credit is a modified version of the process waterProcess water is used for industrial processes and building systems such as cooling towers, boilers, and chillers. It can also refer to water used in operational processes, such as dishwashing, clothes washing, and ice making. credit originally available in LEED for Schools. This pilot credit is based on the prerequisite proposed for LEED 2012.

    Credit Submittals

    General

    1. Register for Pilot Credit(s) here.
    2. Register a username at LEEDuser.com, and participate in online forum
    3. Submit feedback survey; supply PDF of your survey/confirmation of completion with credit documentation

    Credit Specific

    NC, CS, Schools, Retail NC, CI, Retail CI, Healthcare:

    • Provide a schedule indicating ALL process water equipment.  Indicate which types of equipment that are being installed on the project are applicable to the credit and the quantity of equipment which is to be installed. For Healthcare, Schools, Retail and Hospitality projects, include the items in Tables 3& 4 as well.
    • Provide a floor plan indicating the location of all process water equipment.
    • Submit one-line diagrams of all piping systems associated with the referenced equipment, inclusive of design flow rates for both supply and effluent.
    • Provide approved manufacturer's information (i.e. cut sheets, shop drawings, submittals) for each piece of equipment applicable to this credit, indicating at a minimum water usage, capacity of equipment, and energy star rating (if applicable).

    EBOM:

    Provide a copy of the purchasing policy, which must include:

    • detail on its physical and programmatic scope;
    • duration of applicability;
    • responsible parties (by individual name or title);
    • sustainability goals and objectives;
    • procedures and strategies for implementation;
    • specific metrics by which performance will be measured; and
    • a quality assurance process to evaluate and verify successful implementation of the policy.

    Additional Questions

    1. Did your project include any other appliances or process water items that should be included in the credit?
    2. Were you able to find suitable products at a reasonable cost at the flow rates required?
  • USGBC

    Excerpted from LEED 2009 for Commercial Interiors

    WE Pilot Credit 18: Appliance and process water use reduction

    Intent

    Pilot Credit Closed

    This pilot credit is closed to new registrations

    To reduce the burden on water supply and wastewater systems by increasing the water efficiency of appliances and water-consuming processes.

    Requirements

    * This credit language is drawn from the LEED v4 draft. Where other point totals are noted, this pilot credit is worth 1 point in total. *

    Appliance and process water use

    Install appliances, equipment, and processes within the project scope that meet the requirements listed in the tables below .

    Table 2. Standards for appliances

    Appliance Requirement
    Residential clothes washers ENERGY STAR or performance equivalent
    Commercial clothes washers CEE Tier 3A
    Residential dishwashers (standard and compact) ENERGY STAR or performance equivalent
    Prerinse spray valves ≤ 1.3 gpm (4.9 lpm)
    Ice machine ENERGY STAR or performance equivalent and use either air-cooled or closed-loop cooling, such as chilled or condenser water system

    gpm = gallons per minute

    lpm = liters per minute




    Table 3. Standards for processes

    Process Requirement
    Heat rejection and cooling No once-through coolingA once-through (single pass) cooling system is one which water from any source is used to transfer heat from equipment or processes and then discharged. with potable waterPotable water meets or exceeds EPA's drinking water quality standards and is approved for human consumption by the state or local authorities having jurisdiction; it may be supplied from wells or municipal water systems. for any equipment or appliances that reject heat
    Cooling towers and evaporative condensers Equip with:

    • makeup water meters
    • conductivity controllers and overflow alarms
    • efficient drift eliminators that reduce drift to maximum of 0.002% of recirculated water volume for counterflow towers and 0.005% of recirculated water flow for cross-flow towers



    Credit specific:

    NC, CS, Schools, Retail NC, CI, Retail CI, Healthcare:

    1. Provide a schedule indicating ALL process water equipment. Indicate which types of equipment that are being installed on the project are applicable to the credit and the quantity of equipment which is to be installed. For Healthcare, Schools, Retail and Hospitality projects, include the items in Tables 3& 4 as well.
    2. Provide a floor plan indicating the location of all process water equipment.
    3. Submit one-line diagrams of all piping systems associated with the referenced equipment, inclusive of design flow rates for both supply and effluent.
    4. Provide approved manufacturer's information (i.e. cut sheets, shop drawings, submittals) for each piece of equipment applicable to this credit, indicating at a minimum

      water usage, capacity of equipment, and energy star rating (if applicable).

    EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems.:

    Provide a copy of the purchasing policy, which must include:

    1. detail on its physical and programmatic scope;
    2. duration of applicability;
    3. responsible parties (by individual name or title);
    4. sustainability goals and objectives;
    5. procedures and strategies for implementation;
    6. specific metrics by which performance will be measured; and
    7. a quality assurance process to evaluate and verify successful implementation of the policy.

    AND

    Provide the following:

    • a log of all existing equipment covered by the credit
    • a maintenance plan and log to ensure that the equipment is being properly maintained (and not leaking)
    • documentation that at least 20% of all installed equipment and 100% of purchases during the performance period meet the requirements.
    Additional questions:
    1. Did your project include any other appliances or process water items that should be included in the credit?
    2. Were you able to find suitable products at a reasonable cost at the flow rates required?
    Changes:
    • Changes made for 2nd Public Comment (08/01/2011):

      Added Healthcare to the applicable rating system types

      Restructured EBOM requirements based on new EBOM structure for LEED 2012 and

      aligned purchasing agreement language with other EBOM purchasing credits.

      Separate submittal requirements for NC vs. EBOM

      Added Ice Machine requirement (ENERGY STAR) originally in the Appliance & Process Water credit from LEED 2012.

      Clarified Discharge Water Temperature Tempering requirement is based on the water leaving the appliance (rather than the tank) to reduce maintenance concerns.





    • Changes made for 3rd Public Comment (03/01/2012):

      Updated requirements based on changes for 3rd public comments.

      Separated Tables 3&4 addressing food service and specialty process water items not usually included in a commercial office building. These requirements only apply to Healthcare, Schools, Retail and Hospitality projects.

      Removed some process and appliance requirements for EBOM


    • Changes made for 5th Public Comment (01/15/2013):

      Updated metrics to align with 5th Public Comment changes to LEED v4
    • Changes made based on feedback (03/15/2013):

      Modified EBOM requirements to include purchasing logs and inventory of current equipment

      Clarified that projects without any applicable equipment are ineligible

36 Comments

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Janna Alampi
Feb 25 2014
Guest
8 Thumbs Up

Pilot Credits and LEED v4

What impact can we expect LEED v4 to have on pilot credits? Will some of these be integrated into the new version, and will there be new pilot credits to achieve?

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Tristan Roberts LEED AP BD+C, Editorial Director – LEEDuser, BuildingGreen, Inc. Feb 25 2014 LEEDuser Moderator

Janna, many pilot credits were being tested in the pilot credit library prior to being included in LEED v4. Now that LEED v4 is launched and those credits are included in v4 and available for all LEED projects, they are being retired from the pilot credit library. USGBC will continue to introduce new pilot credits as they have new ideas to test.

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Farah A.
Feb 18 2014
Guest
427 Thumbs Up

Once Through Cooling

Can cooling equipmentThe equipment used for cooling room air in a building for human comfort. with once through cooling, that utilizes NONPOTABLE waterNonpotable water: does not meet EPA's drinking water quality standards and is not approved for human consumption by the state or local authorities having jurisdiction. Water that is unsafe or unpalatable to drink because it contains pollutants, contaminants, minerals, or infective agents., be applicable for this credit or is it also ineligible? Could not locate this in the reference guide

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Kim Shinn Principal, TLC Engineering for Architecture Feb 18 2014 LEEDuser Member 733 Thumbs Up

I would say no to the use of nonpotable waterNonpotable water: does not meet EPA's drinking water quality standards and is not approved for human consumption by the state or local authorities having jurisdiction. Water that is unsafe or unpalatable to drink because it contains pollutants, contaminants, minerals, or infective agents., if it ends up going to a sanitary drain. If the heat is rejected in a surface water system, you might also end up with thermal pollution issues.

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Steve Beck Chief Sustainability Officer LeChase Construction Services LLC
Jun 19 2013
LEEDuser Expert
54 Thumbs Up

Water Efficiency in Industrail Projects

We are constructing a large expansion to a dairy products manufacturing plant which the owner desires to certify. Both ourselves (CM) and the design team are concerned about the projects ability to meet WE PR1. To us, the reference manual is less than clear as to how we must treat process waterProcess water is used for industrial processes and building systems such as cooling towers, boilers, and chillers. It can also refer to water used in operational processes, such as dishwashing, clothes washing, and ice making.. This is significant as the process water is 90%+ of the total water usage.

This is a regulated facility so there are limitations on the techiques that can be employed.

Can anyone share any experiences with similar situations

Thx

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Tristan Roberts LEED AP BD+C, Editorial Director – LEEDuser, BuildingGreen, Inc. Nov 05 2013 LEEDuser Moderator

Steve, I'm sorry, but this post kind of got lost here. It would be better to post it to our WEp1 forum.

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Nena Elise
Jun 03 2013
LEEDuser Member
3544 Thumbs Up

Tables not displaying

The tables (1-4) referenced in the Credit Language tab do not display. Please advise. Thank you!

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Trista Little Sustainability Manager, YR&G Jul 09 2013 LEEDuser Expert 1677 Thumbs Up

Hi Nena, the pilot credit is a little easier to read on the USGBC website. It looks to me that Table 2 doesn't exist, and Tables 3 & 4 don't apply to EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems. projects...

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Grant Mansell
Oct 22 2012
Guest
18 Thumbs Up

Commercial grade dishwasher

We're in the process of looking for a commercial grade under counter dishwasher, we have determined that the best suited for our application is the Miele G8050. In total over a 3 - 5 year time frame we'll be installing 20 of these units. Miele does not take part in the Leed certification process so I'm looking for some guidance on what steps I should take to ensure that the units are good enough to meet Leed requirements for our application.

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Theresia Kurnadi Dec 07 2012 Guest 32 Thumbs Up

Hi Grant, have you looked at Energy Star website. They have a long list of Energy Star products along with their water consumption.
http://www.energystar.gov/index.cfm?fuseaction=find_a_product.showProduc...

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Brandon Jones Director of Commercial Green Building Services, Southface Energy Institute Feb 25 2014 Guest

A bit of a late follow-up, but it may help other project teams going forward -

We had a project use an ice maker that was not ENERGY STAR labeled, but met the ENERGY STAR performance equivalency. We were able to confirm this by comparing manufacturer specifications to ENERGY STAR criteria(http://www.energystar.gov/index.cfm?c=comm_ice_machines.pr_crit_comm_ice...). Other appliances applicable to this Pilot Credit have similar ENERGY STAR criteria that are available to view on their website.

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Alexa Stone ecoPreserve: Building Sustainability
Sep 25 2012
LEEDuser Member
2357 Thumbs Up

Purchase required for EBOM

Hi All, This may be a dumb question but it doesn't seem clear in the credit language. Is ACTUAL purchasing of this equipment required during the performance period like the other MR Credits? If it is, there should be clarification on the credit language. Thank you!

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Trista Little Sustainability Manager, YR&G Jul 09 2013 LEEDuser Expert 1677 Thumbs Up

Hi Jeff,

On the USGBC website it looks like EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems. projects must provide:

"documentation that at least 20% of all installed equipment and 100% of purchases during the performance period meet the requirements."

I think this functions similar to the custodial equipment credit, where you're not required to make any equipment purchases, but if you do, all of them must meet the requirements.

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Amy Van Dam Sustainable Design Coordinator Boulder Associates Architects
Jun 19 2012
Guest
279 Thumbs Up

Heavy duty/industrial clothes washers

The Pilot Credit requires “commercial clothes washers” to comply with CEE Tier 3A. Upon investigation, we discovered that this standard applies only to “family-sized washers” for laundromats, multi-family buildings and institutions. The CEE website indicates that these units are “nearly identical to residential models available in retail outlets.” Many of our clients utilize “heavy duty/industrial” washers that do not fall into this category. Is anyone aware of an equivalent standard for “heavy duty/industrial” washers or if one is currently being developed by Energy Star, or CEE another group?

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Batya Metalitz Manager, LEED Technical Development, USGBC Dec 17 2012 LEEDuser Expert 2478 Thumbs Up

We (USGBC staff) would be interested to hear if anyone has found a program for heavy industrial clothes washers. Right now these aren't part of the credit because we can't find a water/energy efficiency program that addresses them the way CEE & ENERGY STAR address the smaller ones.

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Jennifer Knocha Assistant, Mack-Cali Realty Corporation Apr 17 2013 LEEDuser Member 202 Thumbs Up

I was just on the Energy Star website and as of February 1st, they've expanded their criteria for washers to include some commercial-grade machines. I don't know if this helps you, but here's the link:

https://www.energystar.gov/index.cfm?fuseaction=find_a_product.showProdu...

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Adam Shelly Sustainability Project Manager Urban Engineers, Inc.
May 07 2012
Guest
18 Thumbs Up

Water Use Threshold for Credit Eligibility

There should be some sort of water use threshold that the project needs to exceed in order to be eligible for the credit. I'm not sure if it should be a GPM value or a percentage of total water used, but achieving a credit for only one or two appliances on a large project seems out of sorts. Thoughts?

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Marcia Rapone May 10 2012 Guest 22 Thumbs Up

I disagree that the number of appliances should matter. I believe the estimated GPM for the appliances should be noted though, and that perhaps a threshold could come out of that.

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Batya Metalitz Manager, LEED Technical Development, USGBC Dec 11 2012 LEEDuser Expert 2478 Thumbs Up

Hi Adam - This pilot credit is based on the v4 Indoor Water Use Reduction credit (the portion relating to appliance and process waterProcess water is used for industrial processes and building systems such as cooling towers, boilers, and chillers. It can also refer to water used in operational processes, such as dishwashing, clothes washing, and ice making.). In that language there are entry thresholds to earning credit. For example, "To use Table 2, the project must process at least 120,000 lbs (57 606 kg) of laundry per year".Those thresholds, along with other updates to the credit language will be posted in January. To see what the language will look like, take a look at: https://new.usgbc.org/node/2611746?return=/credits/retail---new-construc...

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Janene Bolt Interior Designer Clark Nexsen Architecture Engineering
Apr 04 2012
Guest
69 Thumbs Up

Central Plant Equipment Under scope of credit?

We are looking into this credit for a restoration project at a Navy Yard. After reviewing the credit, it is feasible for us to achieve if the credit does not have any impact on the campus central plant. Within our building, we comply with the “no once through cooling with potable waterPotable water meets or exceeds EPA's drinking water quality standards and is approved for human consumption by the state or local authorities having jurisdiction; it may be supplied from wells or municipal water systems. for any equipment or appliances that reject heat.” However, the central plant that we get our chilled water from has cooling towers, which would need to comply with the upgrades listed in Table 2, IF this credit impacts the central plant.

Any feedback?

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Chris Miller Chief Mechanical Engineer Design Alaska
Dec 19 2011
LEEDuser Member
939 Thumbs Up

CEE Tier III ratings in washers

The Consortium for Energy Efficiency (CEE) updated their list of models that are compliant for the varioius CEE Tier ratings. The website had great information on other appliances too. Check out www.cee1.org.

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Eldis Goytisolo Mechanical Engineer Miami Dade County
Oct 31 2011
Guest
59 Thumbs Up

Residentail Diswashers and Commercial Washers

Where do I find the design flow rates for residentail diswashers and commercial washers?

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Batya Metalitz Manager, LEED Technical Development, USGBC Nov 01 2011 LEEDuser Expert 2478 Thumbs Up

for this pilot credit, the process items just need to meet a minimum performance requirement, rather than show a design case reduction from baseline.

The performance requirements for ENERGY STAR can be found here: http://www.energystar.gov/index.cfm?c=dishwash.pr_crit_dishwashers (residential dishwashers) and here: http://www.energystar.gov/index.cfm?c=clotheswash.pr_crit_clothes_washers (commercial clothes washers)

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Kimberly Frith Sustainability Consultant Alto Sustainability, LLC
Sep 21 2011
LEEDuser Expert
3714 Thumbs Up

Effluent for Dishwashers and Clothes Washing Machines?

How would a team determine the effluent flow rates from residential dishwashers and clothes washing machines? Are there industry standard assumptions for the amount of water lost to evaporation when opening a dishwasher door, or the amount of water leaving a washing machine on wet clothing? Or are we to assume a conservative 1:1 supply to effluent ratio for these appliances?

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Batya Metalitz Manager, LEED Technical Development, USGBC Nov 14 2011 LEEDuser Expert 2478 Thumbs Up

Hi Kimberly - effluent is not really a consideration, at least for the pilot credit. In order to make the process clear and simple to document, we're deferring to the ENERGY STAR specifications on dishwashers and clothes washers. We're looking at the efficiency of the machines in wash process, rather than the total process waterProcess water is used for industrial processes and building systems such as cooling towers, boilers, and chillers. It can also refer to water used in operational processes, such as dishwashing, clothes washing, and ice making. use of the building.

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Monu Goyal Environmental Engineer Metadesign Architects Pvt. Ltd.
Jun 29 2011
Guest
539 Thumbs Up

Clarification for credit application

hii, we are doing a LEED-CI project, in our project scope I found Dishwasher only water consuming appliance, with this can I apply for this credit and whether this will be acceptable or not??

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Suzanne Painter-Supplee, LEED AP+ID&C Director, Consultant Sales, Vollrath Jun 29 2011 LEEDuser Member 773 Thumbs Up

As I understand it, this credit is on a par with EAc1.4 for CI, and also includes water. Your pre-rinse sprays and hand sinks may also be included. No ice machine? Also, as a dishwasher manufacturer, I can tell you first hand that dishwashers, particularly rack conveyor and flights, represent one of the largest opportunities for water and energy savings. There have been DRASTIC drops in both water and KW. As I also understand it, even if it is only a dishwasher, it is PURCHASED, so it counts. I don't think that there is a rule that it has to be a certain number of pieces, such as in LEED for Schools, WEc4.

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Batya Metalitz Manager, LEED Technical Development, USGBC Jun 29 2011 LEEDuser Expert 2478 Thumbs Up

Correct, if the dishwasher is the only applicable appliance then currently you could earn the point that way.

A couple of notes on this: the concern of earning a point for such a small water user came up a lot in public comment, so for the 2nd public comment version of this credit (available in July) there will be some minimum use thresholds in place to ensure that the efficient appliances are indeed having a large impact on the project's total water use.

Also, this pilot credit is based on the LEED 2012 Prerequisite, rather than the credit, so the requirements are less stringent than the credit that will be available in 2012.

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Monu Goyal Environmental Engineer, Metadesign Architects Pvt. Ltd. Jun 30 2011 Guest 539 Thumbs Up

thank you for reply...
But whether electric water heaters like Geyser can be counted under this credit. and please let me know what means schedule, what details need to be given in schedule.

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Jennifer Knocha Assistant, Mack-Cali Realty Corporation Sep 05 2013 LEEDuser Member 202 Thumbs Up

As far as I can tell, water heaters are not included, because it can be used in a way that wouldn't make it process waterProcess water is used for industrial processes and building systems such as cooling towers, boilers, and chillers. It can also refer to water used in operational processes, such as dishwashing, clothes washing, and ice making..

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Gabriele E. Bibee Architectural Intern Clark Nexsen Architecture & Engineering
Mar 01 2011
Guest
84 Thumbs Up

Prerinse spray valves & Water temperature tempering

I am unable to get clarification on two requirements for this Pilot credit:
1) the prerinse spray valve flow rate of 1.3 gpm. Does this apply to dishwashers? If yes, manufacturers do not supply this information.
2) Water temperature tempering. Would this apply to the dishwasher also? If yes, the residential dishwasher in our project, made by GE, does not include a water tempering feature.
Any help on this topic would be appreciated.

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Susan Walter Sr Project Architect, Wilmot/Sanz Mar 01 2011 LEEDuser Expert 15014 Thumbs Up

I would think that the prerinse spray valve would be part of a process done outside of the residential dishwasher and that the manufacturer could provide a total water consumption for the different cycles of the dishwasher. If your user is processing dishes by spraying them first and then loading into the dishwasher, that is the spray valve you need to find. The dishwasher has no mixing valve? That is what is tempering the water.

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Gabriele E. Bibee Architectural Intern, Clark Nexsen Architecture & Engineering Mar 01 2011 Guest 84 Thumbs Up

Based on this coment I am assuming that the requirement for the prerinse spray valves would only apply to a commercial dishwasher one would find in a restaurant. I am still puzzled about the water temperature tempering requirement found in table 2.-min. performance requirements for water-consuming processes. Would this apply to the hot water being discharged by a dishwasher?

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Batya Metalitz Manager, LEED Technical Development, USGBC Mar 02 2011 LEEDuser Expert 2478 Thumbs Up

I don't have a perfect response here, as systems are different, but in general "pre-rinse spray valve" is referring to a stand alone spray hose that is often used in food service settings but wouldn't likely be present in an office kitchenette, for example. It is not referring to a part of the dishwasher.

As for the temperature tempering requirement, we received many public comments on the temperature tempering language in this credit and the difficultly in implementing the strategy that is outlined in the credit. It is currently being revisited by the Water Efficiency Technical Advisory Group (WE TAGLEED Technical Advisory Group (TAG): Subcommittees that consist of industry experts who assist in developing credit interpretations and technical improvements to the LEED system.) and will be modified/clarified for better use by project teams.

In the meantime, please document the flow rates and labels of your process waterProcess water is used for industrial processes and building systems such as cooling towers, boilers, and chillers. It can also refer to water used in operational processes, such as dishwashing, clothes washing, and ice making. and appliances for pilot credit review. For the dishwasher, we'll be looking for whether the dishwasher meets ENERGY STAR, which has a water efficiency component. We anticipate that the new version of the pilot credit (with clarifications) will be up in July. Currently registered projects may switch to the new language at that time.

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Suzanne Painter-Supplee, LEED AP+ID&C Director, Consultant Sales, Vollrath Apr 20 2011 LEEDuser Member 773 Thumbs Up

Better late than never--if this is a commercial project.......-the commercial dishwasher gpm/gph can be found via NSF--http://www.nsf.org/Certified/Common/Company.asp?TradeName=&CompanyName=&PlantState=&PlantCountry=&PlantRegion=&Standard=003&search=SEARCH. Also, there is no ENERGY STAR standard for flight-type dishwashers, which are most common in hospitals, hotels, universities, etc. LEED for Healthcare and Retail have gal/rack standards, and a gph for flights.

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Batya Metalitz Manager, LEED Technical Development, USGBC Apr 21 2011 LEEDuser Expert 2478 Thumbs Up

To add on to Suzanne's post, this pilot credit is based on the proposed appliance & process waterProcess water is used for industrial processes and building systems such as cooling towers, boilers, and chillers. It can also refer to water used in operational processes, such as dishwashing, clothes washing, and ice making. prerequisite, which does not currently place requirements on flight type dishwashers. However, the proposed appliance & process water credit will have a performance metric for flight type dishwashers of 150 gph. We're also revising some of the other prerequisite and credit numbers for second public comment to better align with LEED for Retail and Healthcare numbers, and with what's available in the market. Those new numbers (and a new version of the pilot credit) should be out in July or so.

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