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FAQs about WEc1 :

We can't get weekly readings from the main building water meter. However we can take daily readings from a water subsystem (e.g. irrigation or cooling tower makeup). Can we pursue Option 2 (water subsystem metering) without pursing Option 1 (whole buildin

What kind of meter reading documentation is required to meet the items requested on the credit form? The LEED Online credit form requests both weekly readings, and then also monthly and annual summaries.

What is the best way to track the monthly and annual water consumption summaries for the whole-building and subsystem water meters?

If a building’s meter or submeter was installed less than a year ago, how can we provide monthly and annual summaries?

The water utility for the project building supplies electronic readings of whole building water consumption at least weekly that the project team can access. Will the electronic readings suffice for the required documentation for WEc1?

We own our water meters and the manufacturer of the submeter does not provide documentation recommending a calibration interval. How can we document that we’ve met the calibration requirements?

For meters not owned by a third-party, when should the meter calibration take place in order to comply with WEc1?

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Forum discussion

EBOM-2009 WEc1:Water Performance Measurement

Meter Calibration

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Vincent Maglio
Cheif Engineer
Jones Lang LaSalle
LEEDuser Basic Member
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Finding very difficult to get manufacturer recommended calibration intervals. Is there a code or governing body that can be used as a guide such as NSF or AWWA

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Tue, 03/11/2014 - 20:08

Hi Vincent We've encountered the same problem on our projects but haven't found a guide on the recommended interval. And if there is no interval indicated on the manufacturer's documentation, we get a little nervous about not earning the credit. To that end, we often have building teams replace their water meter immediately prior to their performance period, so that we can justifiably say that the meter has been calibrated. There is a relatively small cost associated with this approach, but it seems to do the trick. Thanks, Hannah

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