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Start by assessing efficiency
To meet this prerequisite, you will need to assess the efficiency of your basic indoor plumbing fixtures, such as faucets, water closets, urinals, and showerheads, and determine how much 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. is consumed relative to a LEED baseline case. If your current bathroom, kitchen and janitorial closet fixtures are already highly efficient, you will probably meet the prerequisite. If your installed fixtures are older and exceed the baseline, you’ll need to modify them.
Baseline depends on when fixtures were installed
The baseline for the prerequisite is established by calculating how much water the project building fixtures would use, based on actual occupancy figures and usage patterns, if it were fully compliant with IPCInternational Plumbing Code/UPCUniform Plumbing Code 2006 plumbing codes displayed in Table 1. This baseline also takes into consideration the installation date of the relevant fixtures. For plumbing systems substantially completed before 1994, the baseline is set at 160% of the IPC/UPC-compliant figure; however, for systems substantially completed in 1994 or later, the baseline is set at 120% of the water usage with code-compliant fixtures. Buildings with a mixture of fixture installation dates will use a weighted average to determine the final baseline.
Inventory installed fixtures
To determine compliance, you will need to inventory all installed fixtures, and document their flow and flush rates and date of installation. It is very important to determine the correct baseline setting, so carefully consider whether you have completed any major renovations to your bathrooms and associated plumbing systems in 1994 or later. If you have a pre-1994 building and have simply replaced bathroom fixtures without performing a more complete renovation of the bathroom structure and plumbing system, you’re allowed to use the 160% baseline for all of your fixtures.
Installing flow or flush restrictors, such as faucet aerators or dual-flushA type of water-saving toilet that gives a choice of flushes depending on the type of waste solid or liquid. flushometers, will carry relatively low costs. Expect significantly higher costs if you must replace the existing toilets to accommodate more efficient flushometers. Depending on water and sewer rates, plumbing retrofits like these can pay off relatively fast, however.
Pay careful attention to the credit form
The key to successful documentation of this credit is proper setup of your building fixture groups in the LEED Online credit form. This part of the form can be confusing and is often misinterpreted. Carefully review the instructions on creating these fixture groups and make sure that the credit form is displaying the correct values for occupancy and number of fixtures in your building when you are finished. USGBC has provided a guide that helps clarify many common issues—be sure to review this (see Resources).
If you have a pre-1994 building, and are planning on performing a major bathroom renovation as part of the overall LEED project, be sure to register the project through LEED Online before starting any retrofitting in order to claim the less stringent 160% baseline.

Start by gathering this information
- How many different types of each fixture are installed in the building? Are fixture specs or product data sheets available for the installed fixtures?
- What is the date of substantial completion for plumbing? Was the project initially built before 1994? If so, have there been renovations since 1994 that affected plumbing fixtures?
- What opportunities exist for low-cost upgrades?
- What upgrades will have the greatest effect on reducing water consumption?
- Are there any high-intensity water uses, for example, a fitness center with showers?
- Are rebates or incentives available to offset upgrade costs?
Legend
- Best Practices
- Gotcha
- Action Steps
- Cost Tip
Schematic Design
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This prerequisite only includes core water uses—bathroom lavatories, water closets, urinals, showers, kitchen faucets and pre-rinse sprays. Janitors’ sinks, pot fillers, and tub faucets can be left out as they are used to fill containers with a fixed water volume regardless of the flow rate. "Kitchen sinks" includes all sinks in public or private buildings that are used with patterns and purposes similar to a sink in a residential kitchen. Break room sinks would be included; commercial kitchen sinks are not included. Lavatory faucets refer to hand-washing sinks, regardless of location, but lab or healthcare sinks with regulated flow rates are excluded. Pot-filling sinks can be excluded.
Before the Performance Period
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All Options
The following indoor plumbing fixtures and fittings are covered in all credit options: water closets, urinals, showerheads, and lavatory faucets.
Develop and implement a policy requiring an economic assessment of a conversion to high-performance plumbing fixtures and fittings as part of any future indoor plumbing renovation.
The assessment must account for potential cost savings on water supply, disposal, and expected maintenance. The economic assessment should, at minimum, determine the simple payback of any new fixture investment. Carefully consider the payback period required to justify your purchasing decision.
In-house staff may develop this policy and the ensuing economic assessment at minimal cost.
If your building has high-efficiency fixtures, consider using Option 4 (some or all fixtures installed before 1993) even if your building was completed or plumbing system renovated after 1993. This is an effective way to determine whether you’re eligible to earn additional points under WEc2.
Option 1: LEED-Certified Building
Provide a copy of the official LEED scorecard confirming that the project building previously earned at least one point in water use reduction credits under another LEED rating system.
This compliance path carries no added cost.
Option 2: Building Constructed in 1993 or Later
Verify that the project building was initially built after January 1, 1993 and that the installed fixtures all meet the prevailing plumbing fixture efficiency standards in place at that time.
Project buildings built in 1993 or later will automatically earn additional points under WEc2 based on use of code-compliant fixtures and fittings.
This compliance path carries no added costs.
Option 3: Plumbing Fixtures Replaced Since 1993
Verify that all relevant fixtures have been replaced since January 1, 1993 and that the installed fixtures all meet the prevailing plumbing fixture efficiency standards in place at the time they were installed.
Provide documentation that authenticates the date and scope of the fixture upgrade.
Formal authentication of the fixture upgrade can be met using copies of construction permits, substantial completion notices, contract excerpts, plumbing inspection reports, commissioning reports, or similar documentation.
If indoor plumbing systems were substantially completed at different times for different parts of the building, use Option 4 (see below) to complete performance calculations using a weighted average water-use baseline.
This compliance path carries minimal costs for documentation.
Option 4: Plumbing Fixtures Installed Before 1993
Inventory all plumbing fixtures to record manufacturer, model number, flush or flow rate and date of installation in project building.
Complete performance and baseline calculations in the LEED Online credit form using fixture data and occupancy and usage information. For plumbing systems substantially completed before 1993, the baseline is set at 160% of the IPC/UPC-compliant figure; however, for systems substantially completed in 1993 or later, the baseline is set at 120% of the water usage with code-compliant fixtures. If you have a pre-1993 building and have simply replaced bathroom fixtures without performing a more complete renovation of the bathroom structure and plumbing system, you’re allowed to use the 160% baseline for all of your fixtures.
If your building supports visitors or retail customers, you will need to calculate the average number of each of these occupant types that use your facilities on a daily basis.
The key to successful documentation of this credit is proper setup of your building fixture groups in the LEED Online credit form. This part of the form can be confusing and is often misinterpreted. Carefully review the instructions on creating these fixture groups and make sure that the credit form is displaying the correct values for occupancy and number of fixtures in your building when you are finished. For additional guidance on setting up these fixture usage groups, please reference guidelines published by USGBC (see Resources).
If performance calculations indicate that water use exceeds the baseline case, find opportunities for water-use reduction through replacement of fixtures and fittings with high-efficiency options.
If retrofitting is required, begin with low-cost fixtures and fittings, such as 0.5 gpm faucet aerators, high performance or dual-flush flushometers, and low-flow showerheads.
When replacing flushometers, make sure that the existing water closet or urinal bowl is capable of providing the flush rate specified on the new hardware. This information should be available on product data sheets or by request from the manufacturer.
If you have a pre-1993 building, and are planning on performing a major bathroom renovation as part of the overall LEED project, be sure to register the project with the USGBC before starting any retrofitting, in order to claim the less stringent 160% baseline case.
Replacement of traditional fixtures with high-performance alternatives may require higher upfront costs. However, these fixtures will conserve water as well as energy (from hot water), and will generally offer a favorable payback.
Provide manufacturer data verifying the flush/flow rate of all installed fixtures and fittings that either exceed or do not meet UPC/IPC specifications.
In buildings with older or diverse fixtures, it may be difficult to find product documentation of flow and flush rates. Identify fixtures by brand and model information, and contact manufacturers for assistance.
During the Performance Period
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Develop and implement a preventative maintenance program to regularly inspect plumbing fixtures and fittings, ensuring proper operation.
A good preventive maintenance program will not only identify leaks and obvious problems, but will also include a regular flow and flush rate test for at least 20% of fixtures to ensure continued performance.
If in-house staff perform preventative maintenance, costs will be minimal.
USGBC
Excerpted from LEED 2009 for Existing Buildings: Operations & Maintenance
COPYRIGHT © 2009 BY THE U.S. GREEN BUILDING COUNCIL, INC. ALL RIGHTS RESERVEDWE Prerequisite 1: Minimum Indoor Plumbing Fixture and Fitting Efficiency
Required
Intent
To reduce indoor fixture and fitting water use within buildings to reduce the burdens on 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.1 supply and wastewater systems.
Requirements
Reduce potable water use of indoor plumbing fixtures and fittings to a level equal to or below the LEED 2009 for Existing Buildings: Operations & Maintenance baseline, calculated assuming 100% of the building’s indoor plumbing fixtures and fittings meet the plumbing code requirements as stated in the 2006 editions of the Uniform Plumbing Code (UPC) or International Plumbing Code (IPC) pertaining to fixture and fitting performance. Fixtures and fittings included in the calculations for this credit are water closets, urinals, showerheads, faucets, faucet replacement aerators and metering faucets.
The LEED 2009 for Existing Buildings: Operations & Maintenance water use baseline is set depending on the year of substantial completion of the building’s indoor plumbing system. Substantial completion is defined as either initial building construction or the last plumbing renovation of all or part of the building that included 100% retrofit of all plumbing fixtures and fittings as part of the renovation. Set the baseline as follows:
- For a plumbing system substantially completed in 1994 or later throughout the building, the baseline is 120% of the water use that would result if all fixtures met the codes cited above.
- For a plumbing system substantially completed before 1994 throughout the building, the baseline is 160% of the water use that would result if all fixtures met the codes cited above.
If indoor plumbing systems were substantially completed at different times (because the plumbing renovations occurred at different times in different parts of the building), Set a whole-building average baseline by prorating between the above limits. Prorate based on the proportion of plumbing fixtures installed during the plumbing renovations in each date period, as explained in the LEED Reference Guide for Green Building Operations & Maintenance, 2009 Edition. Pre-1994 buildings that have had only minor fixture retrofits (e.g., aerators, showerheads, flushing valves) but no plumbing renovations in or after 1994 may use the 160% baseline for the whole building.
Demonstrate fixture and fitting performance through calculations to compare the water use of the as-installed fixtures and fittings with the use of UPC- or IPC-compliant fixtures and fittings, as explained in the LEED Reference Guide for Green Building Operations & Maintenance, 2009 Edition.
Develop and implement a policy requiring economic assessment of conversion to high-performance plumbing fixtures and fittings as part of any future indoor plumbing renovation. The assessment must account for potential water supply and disposal cost savings and maintenance cost savings.
FOOTNOTES:
1. Potable water is defined as water that is suitable for drinking and is supplied from wells or municipal water systems.
Potential Technologies & Strategies
Reduce indoor plumbing fixture and fitting 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. usage through automatic water control systems. Install, where possible, water-conserving indoor plumbing fixtures and fittings that meet or exceed the UPCUniform Plumbing Code 2006 or IPCInternational Plumbing Code 2006 fixture and fitting requirements in combination with high-efficiency or dry fixture and control technologies.
Technical Guides
Uniform Plumbing Code (UPC) 2006, Section 402.0: Water-Conserving Fixtures and Fittings
The Uniform Plumbing Code defines water-conserving fixtures and fittings for water closets, urinals and metered faucets. This ANSI-accredited code safeguards life, health, property and public welfare by regulating and controlling the design, construction, installation, quality of materials, location, operation and maintenance or use of plumbing systems.
International Plumbing Code (IPC) 2006, Section 604: Design of Building Water Distribution System
The International Plumbing Code defines maximum flow rates and consumption for plumbing fixtures and fittings, including private lavatories, public lavatories (metering and those other than metering), showerheads, sink faucets, urinals and water closets.
LEED 2009 Water Use Reduction: Additional Guidance
This document from USGBC offers guidelines to help you properly set up fixture usage groups in the LEED Online credit form, avoiding common mistakes associated with the water-efficiency prerequisite and credit.
Web Tools
EPA WaterSense
WaterSense, a partnership program sponsored by EPA, certifies products that meet its water conservation thresholds.
How to Conserve Water and Use it Effectively
Includes information on practices for conserving water and using water efficiently for residential users, system operators, agricultural users, and for industrial/commercial users. Both engineering and behavioral practices are described.
Rocky Mountain Institute (RMI)
This portion of RMI’s website is devoted to water conservation and efficiency. The site contains information on commercial, industrial and institutional water use, watershed management and articles on policy and implementation.
Terry Love’s Consumer Toilet Reports
This Web site offers a plumber’s perspective on many of the major low flow water efficient toilets used in commercial and residential applications.
Water Closet Performance Testing
This site provides two reports on independent test results for flush performance and reliability for a variety of different toilets.
U.S. DOE, Federal Energy Management Program
This site provides good information on basic water efficiency challenges, best practices and federal, state, and local resources.
WATERGY version 3.0
WATERGY is a spreadsheet model that uses water/energy relationship assumptions to analyze the potential of water savings and associated energy savings.
Alliance for Water Efficiency
The Alliance for Water Efficiency provides information and assistance on water conservation efforts.
Publications
Water: Doing More with Less
This article from Environmental Building News discusses building water efficiency.
Plumbing Renovation Economic Assessment Policy
All Options
All options require documenting a policy that mandates economic assessment of conversion to high-performance plumbing fixtures and fittings as part of any future indoor plumbing renovations.
Water Fixture Inventory
Option 4: Plumbing Fixtures Installed Before 1993
A plumbing fixture inventory needs to include manufacturer, model number, flush or flow rate and date of installation in project building.
LEED Online Forms: EBOM-2009 WE
The following links take you to the public, informational versions of the dynamic LEED Online forms for each EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems.-2009 WE credit. You'll need to fill out the live versions of these forms on LEED Online for each credit you hope to earn.
Version 4 forms (newest):
Version 3 forms:
- WEp1: Water Efficiency
- WEc1: Water Performance Measurement
- WEc2: Additional Water Efficiency
- WEc3: Water Efficient Landscaping
- WEc4.1: Cooling Tower Water Management
- WEc4.2: Cooling Tower Water Management
These links are posted by LEEDuser with USGBC's permission. USGBC has certain usage restrictions on these forms; for more information, visit LEED Online and click "Sample Forms Download."





162 Comments
Calculator template
Does anyone have an excel template that they created to calculate the baseline vs. installed case? I've been working on it, but it is complicated. Email: curley@american.edu if so. Thanks!
Emily, the easiest way to accomplish this is to use the actual WEp1 Credit Form from LEED Online. If you don't have a registered project yet, you can download a sample WEp1 form from LEED Online as well.
Once you have the form, you can enter your Fixture Usage Group data (occupancy, fixtures installed pre/post 1993, etc.) and the information for the Baseline fixture case. After that, you can play around with the Installed case by entering different flow and flush rates to see how different retrofitting initiatives will play out at your facility and track the results of each scenario separately.
This is really the best way to do it because you're taking advantage of the USGBC-published calculation methodology within their own form. When you use a custom excel calculator, there's always a chance that your formulas will differ somehow. This way, you can be confident that the results are accurate.
Thanks. I find the online form to be even more complicated and obtuse than what I'm trying to build to aid our facilities staff in taking an inventory, but I suppose it still may be the best bet.
Emily,
If you're talking about the fixture inventory itself -- rather than the calculation of the baseline vs. installed cases -- then there is a template available through the 'Documentation Toolkit' tab for this credit (on this site).
Rainwater Harvesting
Is it possible to show compliance with this prerequisite by reducing 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. use by harvesting and reusing rainwater for flushing?
Absolutely Udana. I don't believe the LEEDOnline template for WEp1 is currently set up to accomodate this calculation, but in principle the credit is about the amount of 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. used for fixture functions - using non-potable water to replace potable water is a step in the right direction. My thinking is that you would complete the fixture calculations in the normal methodology, then supplement your calculations with an additional submittal detailing the annual graywater1. Defined by the Uniform Plumbing Code (UPC) in its Appendix G, titled "Gray water Systems for Single-Family Dwellings," as "untreated household wastewater which has not come into contact with toilet waste. Grey water includes used water from bathtubs, showers, bathroom wash basins, and water from clothes-washer and laundry tubs. It shall not include wastewater from kitchen sinks or dishwashers." 2. The International Plumbing Code (IPC) defines graywater in its Appendix C, titled "Graywater Recycling Systems," as "wastewater discharged from lavatories, bathtubs, showers, clothes washers, and laundry sinks." Some states and local authorities allow kitchen sink wastewater to be included in graywater. Other differences with the UPC and IPC definitions can probably be found in state and local codes. Project teams should comply with the graywater definitions as established by the authority having jurisdiction in their areas. collection volume (based on metering?) and the % reduction from the baseline resulting when that volume is subtracted from your WEp1 calculation. Alternately, if graywater provides 100% of your flushing water for toilets/urinals year-round, you could input those fixtures as 0 gal/flush and get the same result.
Hope that helps,
Dan
Thanks Dan. was thinking the same. :)
Authentication of water fixture installation date
Had anyone successfully used as-built drawings to verify the installation date of water fixtures? On this page, the Checklist states that,
"Formal authentication of the fixture upgrade can be met using copies of construction permits, substantial completion notices, contract excerpts, plumbing inspection reports, commissioning reports, or similar documentation."
As-built drawings are not specifically listed here, but it seems like they would actually be one of the most reliable forms of authentication.
As long as the as-built drawing is dated after January 1, 1993, that seems like it should be an acceptable piece of documentation to verify that the prerequisite requirements are met.
Thanks for the reply Jason.
Another question: Is the cut-off Jan.1, 1993 or Jan. 1, 1994? The reference guide uses language such as "completed in 1993 or later" and "completed before 1993" implying that the important date is Jan. 1, 1993. However, on this site the language reads "in 1994 or later" and "pre-1994" implying that Jan. 1, 1994 is the cut-off. Which is correct?
David, the Reference Guide as published in 2009 has been updated by LEED addenda reflected in our language above. So it's the 1994 date.
David,
To add to Tristan's comment, your project only needs to adhere to the addendas which were dated prior to your registration date. You can search for this specific change on the USGBC site, here. Depending on when your project was registered it would be either 1993 or 1994.
Transient Occupants (specifically students)
I understand the different occupancy types and the default fixture use values; however, what I do not understand is how I am suppose to get a somewhat accurate estimation of a occupancy daily total for a classroom and office building. Especially if It is such a high traffic building with many entrances and exits.
If you're working on a EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems. project for a K-12 school, you should actually list the students in the building as FTEFull-time equivalent (FTE) represents a regular building occupant who spends 8 hours a day (40 hours a week) in the project building. Part-time or overtime occupants have FTE values based on their hours per day divided by 8 (or hours per week divided by 40). Transient Occupants can be reported as either daily totals or as part of the FTE. Residential occupancy should be estimated based on the number and size of units. Core and Shell projects should refer to the default occupancy table in the Reference Guide appendix. All occupant assumptions must be consistent across all credits in all categories. (based on an 8-hour day). If this is in regards to higher education, where students are not in the building for large chunks of time, you can list them as transient visitors. In either case, you should be able to use enrollment records (or employee records), security logs, or simple interviews with building management to determine the number of occupants in either a school or office building.
If you are just trying to estimate the number of transient visitors to a project building, you can either use security logs or simply estimate the number of visitors based on interviews with building management or a reasonable ratio to regular building occupants. For example, if there are no security logs, but building management makes an educated guess to define the number of daily visitors as about 10% of the total regular building occupants, you can use that as guideline.
Thank you for the reply Jason. I am trying to certify a classroom building. So there are a TON of students going in and out of that building for lectures and discussions. I did take some time to go to the registrar, look up all the classes in the Classroom and Office building and pulled out all the class enrollment numbers for a Monday schedule and a Tuesday schedule, however; it is a ridiculous way to spend my time and there should be a more efficient way. I really appreciate the time you took to answer my question, it was helpful.
Good or no?
The way I am interpreting this credit, it would seem that is the project was built post 1994, while a baseline can be calculated, there is no chance of not meeting the PR as long as a satisfactory maintenance plan is written and implemented. Is this correct?
Also, must the plan be actually implemented or, as with the other PRs, is it only a plan that must be written?
thanks for your insight!
*if the project was built
That is correct - the EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems. template even provides a compliance path specifically for buildings constructed in 1993 and beyond. That being said, in my experience, however, its not uncommon to find higher-flow fixtures even in buildings built in the 1990s. And two important exceptions that remain commonplace are faucets and showerheads - the 2.2gpm faucet remains far more common than 0.5 gpm faucets, and showerheads are all over the map these days. But the answer to your question is yes - the prereq can be earned automatically.
The expectation for the plan is indeed implementation, and I would caution the notion that other policies simply need to be written rather than implemented. For all prerequisite policies, LEED expects full implementation to the extent feasible. That doesn't necessarily mean a specific performance goal would be achieved, but it goes well beyond simply writing a plan and handing it over.
LEED EB - VERSION 2.0 WE prereq 1
- HI everyone,
I am wondering if anyone could help me get the insight of the version 2.0 of this particular prerequisite. We actually need table 3 and 4 to run some calculations for filing the waterless urinals in one of our LEED NC 2009 projects.
Does anyone could help in telling me the differences in WE pre1 between EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems. 2.0 and 2009?
Thanks!
There are some pretty significant differences between the way that compliance was calculated in EB v2.0 and the current methodology for EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems. v2009. I'm not quite sure that I understand why you want to use an EBOM credit form to document your NC project - have you tried using the WEp1 Credit Form provided in your LEED-NC scorecard in LEED Online? I'd strongly recommend this approach since LEED-NC uses yet another methodology that is different from both EB v2.0 and EBOM v2009. Specifically, the NC version of the credit calculates the baseline water consumption in a much more stringent way and you'll need to make sure you meet the NC requirements for your project rather than the more relaxed EBOM requirements.
Plumbing fixture 'renovation'?
If pre-1993 plumbing fixtures are still in place (i.e. the bowls), but their flush valves have been replaced post-1993, does that count as 'plumbing renovation' / fixture replacement for the purposes of the pre-req/credit?
Hi Michael,
Sounds like this would not count as a "plumbing rennovation", so you could still list those fixtures as pre-1993. Per p. 85 of the Reference Guide, my take is that a flushometerA device that utilizes pressure from the water supply system, rather than the force of gravity, to discharge water into the bowl of a toilet or urinal. It is designed to use less water than conventional flush toilets. change out is considered a minor retrofit, and doesn't trigger the more stringent baseline.
FTE Calculations & Application
I'm having a hard time understanding what I should actually use here to put in the online forms for FTEFull-time equivalent (FTE) represents a regular building occupant who spends 8 hours a day (40 hours a week) in the project building. Part-time or overtime occupants have FTE values based on their hours per day divided by 8 (or hours per week divided by 40). Transient Occupants can be reported as either daily totals or as part of the FTE. Residential occupancy should be estimated based on the number and size of units. Core and Shell projects should refer to the default occupancy table in the Reference Guide appendix. All occupant assumptions must be consistent across all credits in all categories.. The reference guide says a full time person has an FTE of 1, and a part time worker is their hours per day divided 8. So for example, if I have 10 full time workers, and 6 part time workers who work 4 hours per day would I enter 13 for FTE? This would come from (10*1)+(4/8)*6 = 13.
Also should things such as water fountains be counted?
Your FTEFull-time equivalent (FTE) represents a regular building occupant who spends 8 hours a day (40 hours a week) in the project building. Part-time or overtime occupants have FTE values based on their hours per day divided by 8 (or hours per week divided by 40). Transient Occupants can be reported as either daily totals or as part of the FTE. Residential occupancy should be estimated based on the number and size of units. Core and Shell projects should refer to the default occupancy table in the Reference Guide appendix. All occupant assumptions must be consistent across all credits in all categories. example looks on target, and water fountains do not come into play for these calculations.
Islamic Water Closets
we have a bit of interesting situation in our project building: of the 181 installed water closets, 37 are Islamic toilets, which use a trigger spray rather than a flush mechanism.
we are trying to get our head around how to best account for this, since it is difficult to establish not only the amount of water used per use, but also the number of times that these toilets are actually used on a daily basis (the organisation who owns and uses the building has a diverse and multi-cultural staff contingent).
does anybody have any experience with this? any smart suggestions on how to account for this? or should we actually submit a CIRCredit Interpretation Ruling. Used by design team members experiencing difficulties in the application of a LEED prerequisite or credit to a project. Typically, difficulties arise when specific issues are not directly addressed by LEED information/guide for this?
many thanks!
I would ask some questions like these...
Who is manufacturer of those closets?
Do they have some product sheets?
Do you count FTEs or actual number of people in your project?
Do you follow any local LEED rating system?
The manufacturer should be able to give you a flow rate for the fixture. (Is it difficult due to variable length of the spray or the age of the fixtures if they are existing?) I would then build a different fixture group for these toilets. As for use rates, these shouldn't vary from the regular toilet use rates. That figure is based on human needs. Anyone using a fixture should be counted and there are a lot of conversations on how to account for various different populations in the other WE forums so I won't repeat that conversation. The foot baths I would treat like 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..
many thanks for the comments!
agree with the comment on use rate - this does make sense.
we do have the flow rates for the trigger spray, but finding it difficult to establish the length of the spray.
to be more specific and thinking out loud: the flow rate is 10l/minute (2.6gpm), all other WCs installed have flush rates of 3 - 6l/flush (0.8/1.6gpf). if we build a different fixture group for these toilets, we would, of course, need to include them under flow fixtures and could then possibly include them under the fixture family of a 'pre-rinse spray valve', in which case we could take a stab at average length of use?
we p1
This is the first time I am working on a LEED EBO&M project and I had the following question: if the bathrooms on two floors only are being renovated in a 7 story bldg. do you enter the FTEFull-time equivalent (FTE) represents a regular building occupant who spends 8 hours a day (40 hours a week) in the project building. Part-time or overtime occupants have FTE values based on their hours per day divided by 8 (or hours per week divided by 40). Transient Occupants can be reported as either daily totals or as part of the FTE. Residential occupancy should be estimated based on the number and size of units. Core and Shell projects should refer to the default occupancy table in the Reference Guide appendix. All occupant assumptions must be consistent across all credits in all categories. of the whole building or just the employees of each floor as 2 seperate groups. If two separate groups, one of the floors has the cafeteria that serves the whole building. does that mean I need to enter the FTE for the entire building on this floor?
Also, all the fixtures except two are prior to 1993, am I correct to assume automatically that the fixtures have to be replaced because the flow is higher than the baseline set by UPCUniform Plumbing Code/IPCInternational Plumbing Code? The owner is interested to see if he can meet the pre-requisite w/out replacing the fixtures using the 160% benchmark. I just cannot seem to figure this one out. Thank you for all the help.
Hi Suha,
In your situation, it sounds like the simplest approach would be to have enter two fixture groups: 1 for the renovated floors, and 1 for the non-renovated floors. You would only include as FTEFull-time equivalent (FTE) represents a regular building occupant who spends 8 hours a day (40 hours a week) in the project building. Part-time or overtime occupants have FTE values based on their hours per day divided by 8 (or hours per week divided by 40). Transient Occupants can be reported as either daily totals or as part of the FTE. Residential occupancy should be estimated based on the number and size of units. Core and Shell projects should refer to the default occupancy table in the Reference Guide appendix. All occupant assumptions must be consistent across all credits in all categories. the occupants that spend the majority of their days on that floors (so not cafeteria-only users). In reality, some of those folks would be using the restrooms on those floors, but there's not really a clean way to account for it.
Alternatively, you could use one fixture group and calculate the weighted average flush rate for the fixtures through the building.
Regarding your other question, I've worked on projects that can maybe sneak by the prerequisite by looking at aerators (0.5 gpm) on the lav faucets, and 1.6 or 1.8 gpm on any break room sinks. Usually, at least some of the toilets or urinals would need upgrading as well to hit the prerequisite, but it really depends on how bad the old fixtures are.
FTE Calculations
My project building has a number of leased spaces that will not be included in our final LEED application, however each of these spaces has full time employees who use the public restrooms and facilities.
Can I include these employees as full time occupants, or should I exclude all data for the spaces that are not going to be included in the final LEED application?
Paul,
I think you could justify inclusion of these folks if you can demonstrate a good rationale for doing so. But, that kind of special circumstance always opens the door for confusion during the review, and many times the % reduction doesn't change if you add or take away people because of how the calcs work (this is not always true, as in cases where the fixtures aren't uniform throughout the building).
Maybe test both scenarios of including and excluding those FTEFull-time equivalent (FTE) represents a regular building occupant who spends 8 hours a day (40 hours a week) in the project building. Part-time or overtime occupants have FTE values based on their hours per day divided by 8 (or hours per week divided by 40). Transient Occupants can be reported as either daily totals or as part of the FTE. Residential occupancy should be estimated based on the number and size of units. Core and Shell projects should refer to the default occupancy table in the Reference Guide appendix. All occupant assumptions must be consistent across all credits in all categories., and if it doesn't really change the results go ahead and keep them excluded for simplicity.
Vacant Space FTE User Group
We are working on a project that has completed the Preliminary Review Phase of Certification, this is a high-rise office building located in an urban area, with occupancy that fluctuated over the performance period. The fixtures of varying flow rates (some replaced in the past year others that are pre 1993). The review comments state “Ensure that ASHRAE Standard 62.1 default occupancy values are used for all vacant or unused spaces in the project building. Create separate user groups for WEp1 to account for the vacant areas.” So if the building is 85% occupied I am assuming that I can calculate the number of “Vacant” FTEs by using 15% of the regularly occupied space (5 FTEs per 1,000 SF), but I am struggled with the fixtures to assign the Vacant FTEs as the vacancy fluctuated (basically monthly) over the Performance Period.
That's a tough one Kelly but the reviewers intent here is simply to ensure that the performance of the fixtures in the vacant space is not ignored in the calculation. They envision a situation where you have a discrete chunk of floor space that is empty, and that you can assign a virtual occupancy to that area by using the ASHRAE default rates. If vacancy fluctuated over the PP, I would be tempted to apply the occupancy levels from the beginning of the PP and calculate the remainder. But I'm not sure if I've quite answered your question. . .
The "Reduced Occupancy Guidance" document from the USGBC addresses this:
For floors or separate tenant spaces that are fully occupied or partially occupied during some portion of the performance period, use the normal procedures for this prerequisite. Assume any partial-year numbers apply on an annual basis as well unless circumstances justify an adjustment.
You can find the document at http://www.usgbc.org/ShowFile.aspx?DocumentID=6292.
My recommendation: If a portion of the building was occupied at the start of the performance period and now is not, then for WEp1 use the occupancy from when it was occupied. The same would be true for a space that was unoccupied and now became occupied during the performance period. The ASHRAE defaults only would apply to spaces that were completely vacant during the entire performance period.
I've got a similar situation, and I'm still confused about how to asisgn # of fixtures.
I have 190 fixtures (all replaced after 1994).
Occupied space has 355 people.
Unoccupied space assumes 145 people.
do I assign 190 fixtures to each group?
or split the total fixtures up proportionally?
thanks
Alyson - Can you assign fixtures based on their physical location? If the occupied space represents floors 1 & 2, and the unoccupied space floor 3, you can distribute fixtures accordingly. If not, proportionally would work as well.
Dan
Flow Regulators with Pressure Compensation
Hi Dan,
I m currently doing couple of LEED C&S buildings. We have suppliers proposing flow regulators to reduce the water flow for Water Faucets, by doing so, it can actually reduce the flow rare to meet the LEED water efficiency requirment.
Is this acceptable?
Hope you can help me on this.
Thankyou
Surenthira, flow restrictors are allowed to contribute to this credit, yes.
LEEDuser plumbing assessment template updated
To all LEEDuser members using our Water Efficiency Economic Assessment Policy for WEp1: we have made a couple minor updates to it to improve it relative to issues we were seeing in LEED certification. If you are starting out, I recommend switching to this new version.
I just received the following comment after using the old policy: "Please provide a revised policy that requires economic assessment of conversion to high performance plumbing fixtures and fittings as part of any future indoor plumbing renovation. The policy must account for potential water supply and disposal cost savings and maintenance cost savings."
Would you say they're looking for some expansion of the items in section 6, or just the addition of potential maintenance costs?
Average Retail Customers for a Bank & Uploading Cut sheets
The project that I am currently working on is a bank that has bathrooms in the lobby for client use and employee bathrooms in the office space behind the lobby. I am trying to figure out the following:
1) As I don’t know the exact number of retail customers I am using the default values out of the EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems. reference guide and have selected the .67 value for small retailer. My question is if I should use the square footage amount of the lobby as that is the only place the customers have access to or should I use the square footage for the whole building? I would also like to know if I was correct in choosing the small retailer value or if the service value would be more appropriate for a bank.
2) Do I only upload the cut sheets for the fixtures that were not compliant with IPCInternational Plumbing Code/UPCUniform Plumbing Code code, or should I upload all of them regardless?
1) If I had to use that estimate I'd probably equate a bank with service rather than retail, but frankly I would rather try to come up with my own estimate of foot traffic. The number of people entering tthe public space of a bank branch can vary widely and I'd feel more comfortable with a number you chased down than the Ref Guide multipliers. Any chance the bank has records of the # of teller transactions per day?
2) Only fixtures that differ from IPCInternational Plumbing Code/UPCUniform Plumbing Code - fixtures that are IPC/UPC compliant don't need to be documented.
Hope that helps,
Dan
WEp1 - Annual Days of Operation
Hi,
Can someone please clarify what is the LEED definition for annual days of operation - is it no. of building operated in a year?
Appreciate any assistance.
Thanks,
Susan
Susan, I would say you've hit it on the head.
WEp1 - Substantial Completion Date
As per WEp1 requirement, the water use baseline is set depending on the year of substantial completion of the building indoor plumbing system. What if the "date" is unknown, doesn't show in permits or plans, what could we use as our reference that could comply to this requirement?
Thanks for any input.
Susan
Susan, couldn't you simply use records from the property appraiser county or city database? Unless the plumbing system was upgraded or replaced after the initial construction, all you need to know is when the building was built. Does this help?
Hi,
Now Im confused, do we need the date of building was built or the plumbing fixtures was installed to comply on this requirement?
thanks,
susan
Susan, if you know when the plumbing fixture were installed then you need that date. if you don't know and you know that there has not been a major renovation of the plumbing, then you should be safe to use the date the building was built.
Hi Alexa,
Thanks for all your responses.
Will USGBC requires us for support documents if we choose either from this date (fixtures installed or building was built)?
Yes, and the same for all the other credits. Documentation is key internally and for this purpose it is helpful to stay organized.
The verbiage the ref guide says to provide is "Provide construction permits, substantial completion notices, contract excerpts, plumbing inspection or commissioning reports, or similar formal authentication of the date and scope of the comprehensive fixture and fitting upgrades."
Hope that helps and refer to LEED online and the ref guide for these required docs.
You're welcome!
Hi,
Im trying to use the sample active forms from LEED online V3 for Wep1 and WEc2 to check if we can meet the % requirement, seems like they didn't calculate?
If i have 2 water closet (WC) for each floor, do i need to input each, e.g. total of 4? How come they did not accept the Lavatory and faucets? Please help.
thanks,
susan
economic assessment
What the client has is a project for proposed upgrades since the building is quite old, making upgrades necessary. This includes plumbing fixtures to comply with UPCUniform Plumbing Code/IPCInternational Plumbing Code standards as one of the priorities. An economic assessment is included in the documentation since it is required by an existing encompassing policy for all expenses which include building services upgrades. Will this suffice?
It sounds compliant to me Pablo - The intent of this aspect of the requirement is simply to ensure that future decisions about water fixtures are made with more complete information in hand. In most instances, fixtures are chosen based on appearance, function, and most of all, capital cost. By requiring economic analysis of more efficient fixtures, USGBC is simply trying to add 'long term water costs' and actual gallons of water saved to that decision matrix. If your assessment does this, it should be fine.
We are being asked to address "disposal cost savings" by the reviewer on our 2008 O&M project in our Economic Assessment policy. If we have already addressed reduced waste water generation - what would they be referring to?
Amy - sounds like a possible mix-up in terminology Amy. 'Disposal cost savings' sounds to me like money you won't be charged for sending water to the municipal sewage plant. I'm not really sure how that differs from waste water generation though - seems like different ways of referring to the same thing. Savings relating to this credit really only come from 3 places - spending less money buying water, spending less money paying to dispose of waste water (sewage), and any reduced labor costs thanks to the new fixtures. If you've provided those three things, you should be all set.
Single User Group, Partial Fixture Renovations, Usage Inequality
My question is 2-fold:
We're trying to complete the WEp1 form using a single fixture group (office) for a pre-1993 commercial office hi-rise. The hi-rise has 37 floors with the same usage patterns and hours on each floor respectively, and any "as-needed" partial fixture upgrades and replacements weren't installed uniformly by floor or gender so I'm unclear on how to accurately input the fixture data so that the daily use calculation appropriately represents the fixture usage. The flush fixture inventory is as follows: (95) 35 Men's & 60 Women's 3.5 gpf WC modified to 2.4 gpf; (30) Women's 1.6 gpf WC modified to dual flush 1.1/1.6; (16) Men's 1.6 gpf WC; (52) Men's Urinals 25-1.0 gpf & 27-1.5 gpf modified to 0.5 gpf respectively.
1) When upgraded fixtures have been installed sporadically throughout 37 floors and in the case of the dual flush toilet, only within some of the women's rooms and none within the men's rooms, does it matter that the template doesn't account for the gender inequality within the automatic daily use calculation nor the proportional use of the number of fixtures by type of fixture?
We also have reduced occupancy to account for so we need to attribute a default head count to our vacant space - however the vacant space within the facility isn't centralized and doesn't have an associated FTEFull-time equivalent (FTE) represents a regular building occupant who spends 8 hours a day (40 hours a week) in the project building. Part-time or overtime occupants have FTE values based on their hours per day divided by 8 (or hours per week divided by 40). Transient Occupants can be reported as either daily totals or as part of the FTE. Residential occupancy should be estimated based on the number and size of units. Core and Shell projects should refer to the default occupancy table in the Reference Guide appendix. All occupant assumptions must be consistent across all credits in all categories. number included within the PIf3 documentation.
2) If we add another Fixture Group (vacant) to represent the unoccupied space - how would we calculate the number of fixtures to attribute to the 2nd fixture group since the vacant office space shares the same set of fixtures as the occupied office space?
I've tried to input this scenario into the forms according to instructions within the LEED Reference Guide for EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems. 2009, the Water Use Reduction Additional Guidance, and the Reduced Occupancy Guidance for LEED 2009 EBOM, but I feel like those instructions don't definitively explain how to document and calculate this type of scenario to accurately represent the WE data.
Thanks for your help.
Complicated question Joanne - I'm struggling a bit to even understand the issues at hand. I think the key is that you should not feel limited by the template - what matters is accurately representing fixture water use in your building. That may mean creating separate Fixture Groups for the male and female populations of a given area. As to the question about the vacant space - no need to account for it separately if that space is served by a shared fixture location. What matters is how many people use a given fixture, how often, and how much water that fixture uses. Vacant space is only addressed separately if it contains dedicated fixtures.
I'm not sure if I helped at all or made things worse!
Dan
Joanne, it sounds like you've already done a fairly thorough job of conducting a water fixture inventory of the building. One option would be to have a single fixture usage group for the entire building and include weighted average flow and flush rates for each fixture type. This is allowable because all occupants in the building have access to all fixtures in the building. Think of it like a pool of fixtures and any occupant can use any fixture they wish at any given time.
If you'd like to try it this way, you would need to provide a detailed narrative (in addition to the WEp1 Credit Form) that summarizes the building fixtures and their installed flow/flush rates. Then you would need to map out the calculations you would use to come up with a weighted average flow or flush rate for each fixture type. Include a separate summary table that lists the weighted average flow/flush rate for each fixture type and make sure that this table matches the data you enter in the Flow Fixture Data and Flush Fixture Data tables on the Credit Form. Finally, make sure you include a manufacturer cut sheet for each fixture that has an installed rate that is higher or lower than UPCUniform Plumbing Code/IPCInternational Plumbing Code standards. This documentation will help support the data points that you use in your calculations to determine the weighted average flow and flush rates.
Throughout all of this, I'd recommend you maintain a 50/50 gender ratio for your fixture usage group and make sure that you account for potential occupancy of your vacant tenant space according to the Reduced Occupancy Guidelines.
Multiple Shift FTEs
I currently work for a manufacturing plant and am curious as to how I should approach the calculations for this credit. We operate on multiple shifts so, do I calculate the baseline and "installed case" for the shift w/ the highest volume of workers? Or must I include all employees across all shifts?
Your help is greatly appreciated.
Eddie, this credit is focused on overall water use, not peak use, so you would want to count all workers, not just those from the largest shift.
If we count FTEFull-time equivalent (FTE) represents a regular building occupant who spends 8 hours a day (40 hours a week) in the project building. Part-time or overtime occupants have FTE values based on their hours per day divided by 8 (or hours per week divided by 40). Transient Occupants can be reported as either daily totals or as part of the FTE. Residential occupancy should be estimated based on the number and size of units. Core and Shell projects should refer to the default occupancy table in the Reference Guide appendix. All occupant assumptions must be consistent across all credits in all categories. for all shifts, which I agree with, how do we account for bike rack quantities and other FTE driven requirements with a total non-simultaneous occupancy? 100 FTE for each of three shifts would be 300 FTE for the claculation of total water savings but we would not need 5% of 300 bike rack spaces when only 100 people will be in the facility during each of the individual shifts.
Correct, water use is from the total number of people flushing in a day, but bike racks should be based on peak occupancy during the largest shift. The PI Form 3 creates different occupancy numbers for peak and total that account for that and should link different FTEFull-time equivalent (FTE) represents a regular building occupant who spends 8 hours a day (40 hours a week) in the project building. Part-time or overtime occupants have FTE values based on their hours per day divided by 8 (or hours per week divided by 40). Transient Occupants can be reported as either daily totals or as part of the FTE. Residential occupancy should be estimated based on the number and size of units. Core and Shell projects should refer to the default occupancy table in the Reference Guide appendix. All occupant assumptions must be consistent across all credits in all categories. numbers to the different credit forms. See Table PIf3-2 and 3-3 for "Total peak users (FTE + peak transients)" and "Daily average project space users." There's a footnote indicating that the Total peak users can be adjusted for multiple shifts, but you need to explain that in the Special Circumstances.
Thus to answer Eddie's original question you'd count all employees for all shifts in a typical day in the FTE table PIf3-2 but reduce the "Total peak users (FTE + peak transients)" in Table PIf3-3 to reflect the busiest shift.
Incidentally, what can be confusing is how to count Transients (Students/ Visitors). The PI form 3-3 has a field for "Daily average," this should be the total number of transients that enter the facility in a typical day, which should be higher than the Peak number which is the high number of transients at any one time on a typical day, say during the lunch rush.
People often ask if transients should be counted separately or as part of the FTE numbers in Table 3-2 (the LEEDUser glossary says you can count them as either). Either way does work, but I think it's clearer to count transients differently from FTE.
For water usage, what matters is the fixture use assumptions that get assigned to FTEs and Transients. The "Total Daily Usage" number in the Flow and Flush Fixture tables of the WE credit forms is based on different number of daily uses assumed for an FTE person and a Transient person. (For example, a FTE person is expected to flush 3 times a day.) Those assumptions are listed in Table 1 of the "Water Use Reduction Additional Guidance" pdf document at:
http://www.usgbc.org/ShowFile.aspx?DocumentID=6493
Since they assume only one toilet flush for every two transients (0.5 per person), and no shower use, people may have different use patterns with their visitors, say in a gym or clinic. To account for that, the WE forms allow you to change the Total Daily Usage value in the tables, as footnote 2 in those forms indicates. Thus for a gym, you might expect 75% of your transients to shower (I'm just guessing), instead of none, so you'd increase the "Total Daily Uses" for the shower fixture row (you might have to add the row to the table.)
Hope that helps - sorry for the long response.
Thanks so much David. It's nice to have our assumptions confirmed. However My question is related to a few NC and CI projects where we have multiple shifts but EB was the only place I could find reference to a multiple shift FTEFull-time equivalent (FTE) represents a regular building occupant who spends 8 hours a day (40 hours a week) in the project building. Part-time or overtime occupants have FTE values based on their hours per day divided by 8 (or hours per week divided by 40). Transient Occupants can be reported as either daily totals or as part of the FTE. Residential occupancy should be estimated based on the number and size of units. Core and Shell projects should refer to the default occupancy table in the Reference Guide appendix. All occupant assumptions must be consistent across all credits in all categories. query. The NC and CI forms only seem to have a peak adjustment cell for Transients & retail customers and no modifier for a peak staff occupancy that would certainly be lower than a 2 or 3 shift workday that the bike rack credit would calculate from in lieu of the full FTE.
Anthony - This might explain it. I submitted the following to the LEEDOnline Feedback:
Issue:
When I go into LEEDOnline for a CI project for Table PIf3-3 (form version 3.0) I have an editable cell for the value of "Total peak users (FTEFull-time equivalent (FTE) represents a regular building occupant who spends 8 hours a day (40 hours a week) in the project building. Part-time or overtime occupants have FTE values based on their hours per day divided by 8 (or hours per week divided by 40). Transient Occupants can be reported as either daily totals or as part of the FTE. Residential occupancy should be estimated based on the number and size of units. Core and Shell projects should refer to the default occupancy table in the Reference Guide appendix. All occupant assumptions must be consistent across all credits in all categories. + peak transients)*" that I can adjust if there's a lower peak FTE for shift work. There's an asterisk for that row indicating it can be modified for shift work: "*May be modified to account for shift work. If modified, provide a detailed explanation in the Special Circumstances section below."
But when I go into an NC project for the same table (also a form version 3.0) that same field is not editable and there's no asterisk or note. This would appear to be an error as the same situation could apply to an NC project. I'd propose that the same note and ability to edit that cell be added to the NC forms if this is indeed missing from the most current form.
Response:
The new version of the NC form (version 4.0) has a complex occupancy option for non-standard occupancy patterns such as shift work. If you would like to upgrade your form, please let us know via the Feedback Link. For more information on updates to the forms, please see the LEED Online v3 Form Fix Log.
We apologize for the inconvenience and thank you for your continued patience,
LEED Customer Service
WEp1 - Economic Assessment Policy Clarification
My project building is very new and operation started from 2008 onwards. All the plumbing fixtures and fittings are high-efficiency ones meeting the IPCInternational Plumbing Code baseline standards. However, we had retrofitted certain fixtures & fittings aimed to achieve more percentage savings.
First of all, is it required to document the policy mandating an economic assessment of conversion to high-performance plumbing fixtures and fittings as part of any future indoor plumbing renovation?
In my case, even I have the policy but how can I account disposal cost and maintenance cost savings? Is it really required to satisfy the pre-requisite?
How can I approach this problem? Has anyone else had to deal with this?
I would like to recommend the minimum it would take to get my client to meet this prerequisite, but how can I do that? Thank you for your help.
I am not sure I understand the difficulty you are having. Can you clarify what the problem is that you need help with?
Thanks for your reply. The documentation tool kit has a general policy whereas we are unable to calculate potential water supply and disposal cost savings as well as maintenance cost savings. Please help me with a sample calculation sheet.
This kind of calculation is very project-specific. I'm afraid that I think you need to develop your own calculations for this.
Unable to obtain cut sheet
we install a low flow device into our blow out fixture and a external testing show the installed device capable to save 20% water once it been installed. we excited about it, and make the necessary changes into all our water fixture. it been doing good, and we looking forward to have our performance period to start very soon. but then we notice that, the device doesnt come with any cut sheet for us to do the submission, and after a long discussion, we decided to run a 20% testing onto all the fixture.
the question is, can we do the testing during the performance period or we have to complete the testing before the performance period?
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