How to calculated for hybrid urinals

Susan Di Giulio

Senior Project Manager

Zinner Consultants

LEEDuser Basic Member

110 thumbs up

Project location :

United States

July 20, 2016

Sloan has a new "hybrid" urinal that is basically waterless but does a pre-programmed, 1 gallon system flush every 72 hours. This solves a lot of maintenance and odor problems. However, how does the USGBC want us to calculate water use? Still Zero? When you account for reduced maintenance, it might be a "wash" so to speak.........

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Carlie Bullock-Jones

Principal

Ecoworks Studio

LEEDuser Expert

148 thumbs up

Thu, 08/11/2016 - 18:24

Hi Susan, It is my understanding that for now, hybrid urinals that use less than 150 gallons annually for automated maintenance flushing (such as the Sloan model referenced) can be considered waterless urinals in LEED calculations and listed as 0 gpf in the design case given the negligible usage. Hope this helps!

Stacey Olson

SW Regional Design Resilience Leader

Gensler

LEEDuser Basic Member

15 thumbs up

Thu, 09/13/2018 - 19:55

Has there been an update on defining hybrid urinals as waterless since 2016? As it pertains to LEEDv4 and WaterSense requirements, would a waterless urinal be exempt from these requirements? Thank you.

Emily Purcell

Sustainable Design Lead

CannonDesign

LEEDuser Expert

379 thumbs up

Thu, 09/13/2018 - 21:07

Yes - see LEED interpretation 10459. Waterless and hybrid urinals are not regulated by WaterSense, so I assume they're treated like any other fixture that's not certifiable and exempted.

Stacey Olson

SW Regional Design Resilience Leader

Gensler

LEEDuser Basic Member

15 thumbs up

Fri, 09/14/2018 - 01:52

perfect thank you,