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FAQs about WEp1 :

We provided new showers in our project to comply with the alternative transportation credit. Should they be considered in WEp1 calculations?

Can you explain the 12-second duration for metering faucets?

Can I use a nonpotable water source to contribute to WEp1 compliance?

Our project does not have any eligible water fixtures in the project boundary. Can we comply with WEp1?

We are having trouble finding EPAct-compliant fixtures. Is that a problem?

Where can I find a clear meaning of "public" and "private" as relevant to lavatory faucets?

Our project is a factory with historically a 95% male workforce. The restroom design accounts for this. Can I argue that the male/female gender ratio is different than 50/50?

Are shower duration controls an acceptable water-saving strategy?

Can I include process water savings in order to earn an Exemplary Performance point?

Will the reviewers accept a spreadsheet as a plumbing fixture schedule in lieu of the plans from the Construction Documents?

In LEED review comments I've been referred to the Water Use Reduction Additional Guidance document. I didn't know this was a required reference document.

Should I include bar sinks? What about mop sinks or janitor sinks? Swimming pools? Safety showers? Bidets? Tub spouts?

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CI-2009 WEp1:Water Use Reduction—20% Reduction

Fixtures included in WEp1.

Hi, I believe that I already know the answer but I want to present my doubt to you as a double-check. Turns out I'm working on a CI project that only installed kitchen sinks within the tenant space, the restrooms are located on the core of the building. So if my comprehension of the prerequisite is accurate I would only have to develop the calculations for WEp1 including the kitchen sinks flow, and the rest of the fixtures should be included in WEc1 right?

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William Weaver
LEED Fellow, WELL AP
JLL
LEEDuser Basic Member
125 thumbs up

Tue, 12/02/2014 - 15:35

Correct. If no modifications are being made to the core restrooms as part of the project scope, then you would only include those fixtures that are within the tenant space (i.e. kitchen sink) for WEp1. The core restrooms would then be factored into the equation for WEc1. If, however, the core restrooms are being modified as part of the project scope, then they would be included in the WEp1 calculations as well.
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William Weaver
LEED Fellow, WELL AP
JLL
LEEDuser Basic Member
125 thumbs up

Tue, 12/02/2014 - 15:37

My comment above is assuming of course it is a multi-tenant floor. If the tenant takes the entire floor, then I would typically include the core restrooms in the WEp1 calculation.

Tue, 12/02/2014 - 16:03

William, Project is installed in two floors, one floor is shared and the other one is occupied completely by the project. Do you still recommend to include the restroom fixtures in the prerequisite? Just to be sure, this is a recommendation made by you but it's not a must-do presented by LEED right?
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William Weaver
LEED Fellow, WELL AP
JLL
LEEDuser Basic Member
125 thumbs up

Tue, 12/02/2014 - 16:09

Per the July 19, 2010 Addenda, all fixtures - including existing - that are within the LEED project boundary are to be included in WEp1. Given a full floor occupancy, the core restrooms on that floor would technically fall within the boundary.

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