My question is pertaining to the water calculator sheet for WEp1 pre-requisite. This is for a LEED v3 New Building office project.
We recently received comments regarding lavatory faucet and showerhead fixtures and would like to clarify the following:
1) Only specific people in the building have access to the restroom with a private showerhead fixture and lavatory fixture. If for example we have 100 regular occupants and 250 visitors and only 1 regular occupant will have access to this restroom, the 'Percent of Occupant' will be about 0.25% ( 1/ (250+100) X 100 = 0.25%). Is this the correct method to determine the percent occupant? The spreadsheet rounds the 0.25% to 0% which therefore calculates the water usage 0 as well. In this scenario, should the fixture be completely taken out from the calculation sheet or should the % be rounded to 1%? This issue is with the private lavatory fixture as well.
2) The private fixture type based on the project's plumbing schedule is 'Residential Showerhead' and 'Lavatory - Residential'. It is a private restroom. What is the correct type of fixture option to choose under Fixture Type in the 'Water Use Reduction Calculator'?
Choose the 'Public Lavatory (restroom) faucet' and 'Showerhead' options for the two private fixtures and use the default Uses per Day and Total Daily Uses to calculate the Daily Water Use
Choose the 'Private lavatory (restroom) faucet - metered' and 'Residential Showerhead' options for the two private fixtures and input 'Other' Uses per Day and 'Non-default' Total Daily Uses to calculate the Daily Water Use