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FAQs about WEc3 :

What if the building has no irrigation systems?

Can I still use Option 1 if I have metered irrigation water use data but it’s only for a couple of months or not the whole irrigation season?

The site already uses reclaimed water for irrigation provided by the water utility or reuses graywater from the building for irrigation. Can the building still qualify for the credit?

To determine the baseline for Option 1, how can we determine what “conventional” practices are?

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EBOM-2009 WEc3:Water Efficient Landscaping

Rainwater storage system

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Karin Wohlert
NW Sustainable Consulting, LLC
LEEDuser Basic Member
0 thumbs up

I'm looking for a calculator or guide that would suggest how much rainwater could be collected in Mid-summer or the month with the highest irrigation demand. We have a 3000 gallon cistern in the Pacific northwest. I would guess that the tank would be considered dry in the summer but it would be great to confirm. Thank you for any advice.

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Tristan Roberts
Representative
Vermont House of Representatives
LEEDuser Expert
7780 thumbs up

Wed, 07/31/2013 - 16:29

Karin, I don't know of a single good resource on this. I would ideally consult with an engineer. 
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Lyle Axelarris
Building Enclosure Consultant
BPL Enclosure
LEEDuser Basic Member
58 thumbs up

Thu, 08/01/2013 - 01:01

Karin, Contech's rainwater harvesting runoff reduction calculator will help you with monthly supply/demand optimization: http://www.conteches.com/Design-Toolbox/DYO-Project.aspx I am not affiliated with Contech, but I like this tool. I hope it helps you. Feel free to contact me to discuss further.
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Karin Wohlert
NW Sustainable Consulting, LLC
LEEDuser Basic Member
0 thumbs up

Mon, 08/12/2013 - 16:34

Thank you! The calculator is super helpful.

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