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

Baseline for public metering/Autocontrol Lavatory Faucet

Profile picture for user lida
Lise Dannesboe
Sustainability Manager
COWI
LEEDuser Premium Member
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Hi! I went through descriptions how to calculate the design case for public metering/Autocontrol Lavatory Faucets and have among others the 2013 version "Water Use Reduction Additional Guideline" in front of me. The guideline states that baseline for public metering/Autocontrol Lavatory Faucets is 0.25 GPC and the design case is calculated by flow rate and 12 seconds duration. This is then benchmarked against 0.25 GPC. Example: design case= 1.32 GPM * 12/60= 0.26 GPC. Then I would benchmark 0.25 against 0.26 and find out that i actually use more water in the design case than the baseline. Is the calculation correct? Thanks.

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Fri, 07/05/2013 - 15:48

Hello Juliane, Yes, the conversion is correct. Note that the lavatory fixture can exceed the baseline, as long as your overall performance of all applicable fixtures demonstrates a 20% reduction.

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