Hi dear mates,
I need to add grey water usadge to Indoor water use reduction credit. According to my calculation 100 % of the WC flush water would be reused from showerhead and sinks.
It is correc to write 0 lpm at WC design water flor rate or how can I add the greywater reduction from wc flush.
Thank you vey much in advance
emily reese moody
Sustainability Director, Certifications & ComplianceJacobs
LEEDuser Expert
454 thumbs up
November 18, 2021 - 1:07 pm
Hi Fran,
It's a little buried, but the Reference Guide has the following text at the very end of the "Further Explanation" section:
"This prerequisite deals only with the water efficiency of fittings and fixtures, appliances, and processes that use
potable water. Water derived from alternative sources, such as captured rainwater, is not considered under this
prerequisite but can be used to document additional savings in WE Credit Indoor Water Use Reduction."
So, for the Prereq calcs, you do not include any adjustments for your greywater info.
For the Credit calcs, you'll have your regular Water Use calculator populated with the applicable fixture info, and will supplement with a separate upload showing your additional savings from the greywater. This is outlined in the Ref Guide under the "Step-by-Step Guidance" section. If needed, you can provide a narrative explaining your calcs/systems with the greywater calcs.
Hope that helps.