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FAQs about WEc3 :

What if the building has no irrigation systems?

Can I still use Option 1 if I have metered irrigation water use data but it’s only for a couple of months or not the whole irrigation season?

The site already uses reclaimed water for irrigation provided by the water utility or reuses graywater from the building for irrigation. Can the building still qualify for the credit?

To determine the baseline for Option 1, how can we determine what “conventional” practices are?

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EBOM-2009 WEc3:Water Efficient Landscaping

Hi, I have a project in the

Hi, I have a project in the NY zip code 10589 that has two types of irrigation: 1. Unmetered irrigation by retention pond for 58,094 SF of lawn and trees along the driveway 2. Metered landscape irrigation for 74,029 SF of lawn and plants near the building I only have 3 months of metered data (May 84,540 gallons, June 84,540 gallons, and July 463,480 gallons) for the metered irrigation, but no metered data for the irrigation system fed by the retention pond. How do I estimate a baseline for LEED EBOM v3 WE credit 3? They have oak, maple, hickory, beech and elm trees. I don't know what grass or plantings they have, but I do know they are using a sprinkler system.

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Ben Stanley
Senior Sustainability Manager
WSP - Built Ecology
LEEDuser Expert
188 thumbs up

Wed, 10/19/2011 - 20:49

Because you only have three months of data, it might be best to pursue the credit through Option 2, which is the theoretical calculation. The baseline water use is calculated for July accordingly. If you do it this way, you can't use the metered data to compare to the theoretical baseline and instead you have to use the theoretical methodology to calculate the "design" case for comparison to the baseline.

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