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NC-v4 WEp1:Outdoor water use reduction

Weather-Based Controls/ Moisture & Rain Sensors

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LUCY WILLIAMS
Principal
Lucy C. Williams, Architect
LEEDuser Basic Member
31 thumbs up

Hi All-

I am working on a project that will integrate a moisture sensor component into the overall irrigation system in order to hit the 30% prerequisite and hopefully 50% credit threshold for irrigation water reduction.  I have downloaded and reviewed both the LEED Outdoor Water Use calculator and the EPA Watersense irrigation calculator referenced by LEED.  Neither of these excel files acknowledge the use of a rain sensor (or similar) for a water reduction strategy.  However, the LEED reference guide (BD+C, NC) says “Watersense irrigation controller specifications outline the requirements for weather based irrigation controller systems.  These systems earn projects a standard 15% reduction in landscape water requirement for WE credit Outdoor Water Use reduction”. 

I do not see this reduction available on the LEED form or the calculators.  How is water savings recognized for the credit with an integrated Watersense weather system?

Thank you!

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Profile picture for user LWA
LUCY WILLIAMS
Principal
Lucy C. Williams, Architect
LEEDuser Basic Member
31 thumbs up

Wed, 09/25/2019 - 21:14

Any thoughts?
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Joshua Mauldin
Senior Architect
Grace Design Studios
LEEDuser Premium Member
0 thumbs up

Thu, 01/02/2020 - 16:45

A similar question was asked here: https://leeduser.buildinggreen.com/forum/smart-irrigation-controls-0 I took the Landscape Water Requirement, multiplied by .15 and entered this number in the box for "Additional reduction through alternative water source and/or smart scheduling technologies".  The credit form then subtracts this number from the LWR and adjusts the total percent reduction from baseline.  

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