Solar Water Heater Savings Calculation

Jimmy Sparkman

LEEDuser Basic Member

0 thumbs up

September 8, 2014

I need to document, through LEED NC 2009, my energy savings through the use of a solar water heater. I'm not certain if there is a savings estimating spreadsheet out there for use or not. If so, I'm unable to find it. Also, should I include this in my energy model or document elsewhere when submitted such as Table L-1 within the submittal. Apparently, a calculation method that usees a percentage reduction in service water energy is not sufficient to document savings associated with this system.

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Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Tue, 09/09/2014 - 14:13

We use RETScreen - http://www.retscreen.net/ang/g_solarw.php Some energy modeling software can model it directly. Renewable energy is entered in Section 1.8 of the form.

Jimmy Sparkman

LEEDuser Basic Member

0 thumbs up

Tue, 09/09/2014 - 14:41

So I would not enter the savings in my energy model because it would be double counted...correct?

Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Tue, 09/09/2014 - 15:21

Correct you would not also show the savings under service hot water in Table EAp2-5. Report it in Section 1.8. You can model the savings in your model just do not report it in Table EAp2-5. Do a model with and without and report the difference in Section 1.8.