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We are having trouble finding EPAct-compliant fixtures. Is that a problem?

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NC-2009 WEp1:Water Use Reduction—20% Reduction

Hourly Data for Rainwater Harvesting Calculation

Hello, I need to do a rainwater harvesting analysis for our building. I am clear on how to do the analysis...but I am having some trouble finding the hourly precipitation data I need in spreadsheet format. What data do others use, and where do you find it? Is it freely available, or does it have to be purchased? Thanks!

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Fri, 04/01/2016 - 16:56

Check NOAA for weather data. Here's the link for the hourly rainfall data: https://www.ncdc.noaa.gov/data-access/quick-links#h-precip (I believe it's free, but it can take a little time to get the data (a few minutes or up to a day).) I have to admit I haven't had to do these calcs in quite a while, but do you really need to use HOURLY precipitation data or would daily be enough detail? I would imagine with hourly data, you'd then struggle to define at what time each day the various fixtures would be using the rainwater that's collected, and that basing it on daily rainfall data would be detailed enough, perhaps looking at a few different historical years... (But again, I haven't done these calcs in a while, and off hand I don't recall if LEED perhaps require them to be done on an hourly basis...)

Mon, 04/04/2016 - 17:53

Thanks for the response. I did end up using free NOAA data, though it took some time to get it into a workable format.

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