path 7 & 8 : Gray water

soha yamani

Senior Sustainability Engineer

Metec Consultants

LEEDuser Basic Member

12 thumbs up

August 5, 2012

my project is registered for LEED CI 2009 , we are using gray water for irrigation , which means 100 % reduction of potable water , does this qualify the project for the other 2 points of path 8 ?? ,, and will i need to make calculations ??

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Michael Smithing

Director - Green Building Advisory

Colliers International Ltd.

LEEDuser Basic Member

201 thumbs up

Mon, 08/06/2012 - 03:25

Yes and yes. I asked a similar question recently (which I don't see now). You can only avoid the calculations if you don't use water. The LEED On-line form says you need to show a 50% reduction in water use for the second 2 points but this is not a CI requirement.

soha yamani

Senior Sustainability Engineer

Metec Consultants

LEEDuser Basic Member

12 thumbs up

Mon, 08/06/2012 - 12:49

EXACTLY ,, so what is the CI requirements for achieving the 4 points ??

Susann Geithner

Principal

Emerald Built Environments

LEEDuser Basic Member

900 thumbs up

Thu, 08/09/2012 - 15:37

Soha, you will still have to fill out the calculation to show that gray water available for irrigation is enough to meet the irrigation demand. Usually you will perform a calculation showing the supply of gray water, the tank and how much it is filled and the draw for irrigation. We usually show this for the entire year, per day.

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path 7 & 8 : Gray water

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