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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.

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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?

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EBOM-2009 WEc1:Water Performance Measurement

Measurement by deduction: hot and cold domestic water

Hello LEEDusers,

It’s the first time I work on a LEED credit. The project is a new construction (NC-2009) and we aim for the Water Performance Measurement (WEc1) of an existing building in operation.

Since the project is still in construction, I have to provide reasonable calculation to demonstrate that 40% or 80% of the total water is measured. I will use the estimated water consumption used for design to set the base of my calculation.

We have a meter on the entry of water on the building. The network is divided into 3 branches: industrial water (cooling towers, measured), process water (measured) and cold domestic water. There is no irrigation required for this project. The way the entire network is designed, I can go for a deduction calculation for indoor plumbing and fixtures (cold domestic water). However, domestic hot water is not measured and is produced within cold domestic water network (typical configuration).

My question is: Can I still do a deduction calculation for cold domestic water? How do I treat hot domestic water?

Thanks for your help!

MM

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Ben Stanley
Senior Sustainability Manager
WSP - Built Ecology
LEEDuser Expert
188 thumbs up

Thu, 01/11/2018 - 19:25

Hello,  If the domestic hot water is only used for indoor plumbing fixtures, then you could use the deduct method described above to separately measure the indoor plumbing fixtures and fittings end use as listed in the reference guide. If the domestic hot water serves another system besides plumbing fixtures, the deduct method wouldn't work in this scenario.

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