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

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

Lavetory Faucet default duration

I have noticed a discrepency between the default duration shown within the LEED NC 2009 manual WEp1 table 2 and the default duration which auto populates for Private Lavatory Faucet on LEED Online Table WEp1-4: LEED manual: duration = 15 seconds (12 seconds with autocontrol) LEED Online: duration = 30 seconds. Which one can I assume to be correct? I am guessing that there has been an addendum to WEp1 in the manual that I have perhaps missed...? Mnay thanks, Susie

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Charles Nepps
NH Green Consulting
LEEDuser Premium Member
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Tue, 09/29/2015 - 13:29

There was a addendum to Table 2a in 2011: "In the sixth row (“Lavatory Faucet”), replace the duration (sec) of 15 with 30; replace the related note below table with “Default duration for the metering type / autocontrol faucet is 15 seconds for the baseline and 12 seconds for the design case."

Tue, 09/29/2015 - 14:26

Thank you very much Charles. Excuse the LEED ignorance (its a fairly new one on us here in the UK) but is there a complete list of addendums to LEED 2009 anywhere? Or better still, is there an updated LEED manual which includes all of the addendums? I'm concerned as to which other addendums I may not be aware of!
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Charles Nepps
NH Green Consulting
LEEDuser Premium Member
80 thumbs up

Tue, 09/29/2015 - 16:21

Susannah, No problem, we're all here to help each other. ) Addenda tracking in v2009 is a bit disorganized, always best to go the the USGBC website and check the "credit library" for the current language. There are also some pdfs summaries you can download that show the various changes at: http://www.usgbc.org/search/document%20addenda Just scroll down until you see the document for rating system you're working with; careful, there are also updated addenda summaries, so make sure you scan them all to get the most current. The USGBC is improving this addendum tracking process for LEED v4.

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