We are submitting a LEED v4 BD+C NC project with LEED v4.1 upgrades on a credit-by-credit basis. Minimum and Optimize Energy Performance have remained v4. We are interested in pursuing the v4.1 WE – Optimize Process Water Use credit via Option 2 methodology of comparing to a baseline model, however, we have modeled the building under ASHRAE 90.1 2010 Standard. Are we eligible for credit achievement using the ASHRAE 90.1 2010 model, in lieu of creating a second model (modeled to ASHRAE 90.1 2016) solely for the purposes of credit achievement?
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Marianne Vajstedt
LEED ConsultantGeniMac inc.
3 thumbs up
January 11, 2022 - 4:29 pm
I have the same question as Deb Favaretto. Additionally, what are the requirements on the results of the energy model?
The credit EA Energy Performance remain under LEEDv4 and ASHRAE 90.1-2010.
Afogreen Build
www.afogreenbuild.comGreen Building Consultant
214 thumbs up
February 15, 2022 - 1:00 am
Hi Deb,
If you choose a credit under LEED v4.1, then you should follow all the credit requirement under LEED v4.1. The v4.1 WE – Optimize Process Water Use credit via Option 2 requires to model baseline system using ASHRAE 90.1-2016, then you should do it. You can check first whether any discrepancies between ASHRAE 90.1-2010 and ASHRAE 90.1-2016 in term of baseline model.
Brittany Garneau
EngineerDecember 19, 2023 - 8:06 am
Hi from Canada,
We asked LEED Coach Canada and this was their reply (October 2023) :
"The project team is inquiring whether the LEEDv4.1 WE Optimize Process Water Use credit (Option 2) can be achieved even though the energy simulation uses ASHRAE 90.1-2010.
Yes. The project team can demonstrate the Baseline equivalences between ASHRAE 90.1-2010 and ASHRAE 90.1-2016 for this credit."
Hope this helps!