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NC-2009 WEp1:Water Use Reduction—20% Reduction

Residential Dual Flush Calculations

When you are calculating, dual flush weighted averages for residential usage, the guidance says 1:2 ratio of full to low flush uses for both females and males. That works great with 3 uses, but residential is 5 uses. Does that mean 2 full and 3 low? Or are we using fractions?

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Kathryn West
LEED AP BD+C, O+M, Green Globes Professional
JLL
LEEDuser Basic Member
112 thumbs up

Mon, 12/30/2013 - 20:09

yeah... should be covered in guidance document but it is not. I just multiplied by .333 and .667 to get the 1:2 ratio.... so I am using fractions- they use fractions for the visitor uses per day so I figure it makes sense for the Residential uses to be in fractions. I got 3.335 for low flow uses per day and 1.665 for full flushes.

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