We are working on a single floor, single tenant project with several fixture group assignments. The floor public fixtures are treated as public fixtures, but there are a number of exam rooms where each room has its own toilet, urinal, and lavatory. Due to the nature of the exams, the users will invariably utilize the lavatory. We are treating the lavatories in the exam rooms as private lav faucets. The design case calls for a metered .5 gpm faucet @ 20 second time = .17 gpc.
Question - Since the private lav faucet pulldown does not show metered faucet, should we select "ultra low flow" - 2.2 gpm x 30 sec, or "other", and show a metered 2.2 gpm faucet @ 20 second time = .73 gpc? I am inclined to use the latter, but I would like to get some feedback to see if we are on the right track.
Thanks!
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Carlie Bullock-Jones
PrincipalEcoworks Studio
LEEDuser Expert
220 thumbs up
September 5, 2012 - 6:46 pm
Hi Vincent,
I don’t know the details of your project scope (i.e. hospital vs. a clinic with exam rooms) but note that private lavatory use applies only to plumbing fixtures in residences, apartments, and dormitories; to private (non-public) bathrooms in transient lodging facilities (hotels and motels); and to private bathrooms within hospitals and nursing facilities.
If your exam rooms lavs meet the definition of private lavatory use, you will need covert the autocontrol/metered faucets from GPM to GPC and list this in the form calculations as (other) Metering in Table WEp1-4 Flow Fixture Data. Ensure that the design case calculations use the default 12-second duration when converting to GPC. Note that the duration column is not applicable in this case and therefore should not be modified (e.g. a 2.2 gpm fixture x 12 seconds = 0.44 gpc). Refer to the Water Use Additional Guidance document on the USGBC website (http://www.usgbc.org/ShowFile.aspx?DocumentID=6493) for additional information.
Hope helpful!