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

Rainwater use applicable for non-Retail/Healthcare projects?

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Timothy Casper
Voith & Mactavish Architects
LEEDuser Basic Member
3 thumbs up

The USGBC document, "Water Use Reduction Additional Guidance" states, "Retail and Healthcare projects may apply on-site non-potable water sources for fixtures and process water use reduction." Does this mean only Retail and Healthcare projects are able to count rainwater use towards water reduction calculations? Or can any project use this strategy for WEp1?

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Tristan Roberts
Representative
Vermont House of Representatives
LEEDuser Expert
7780 thumbs up

Thu, 05/09/2013 - 14:35

Timothy, any project can use nonpotable water sources to meet requirements.
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Timothy Casper
Voith & Mactavish Architects
LEEDuser Basic Member
3 thumbs up

Thu, 05/09/2013 - 14:37

Thanks Tristan. I wish the Additional Guidance document would make that clear!

Thu, 05/09/2013 - 14:45

Just a reminder to Healthcare projects who may be reading this, you can not use nonpotable water inside the building for plumbing fixtures. You'll be in a big heap of trouble with the AHJ and the Joint Commission. You can use non potable water for landscaping and cooling tower blow down.

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