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NC-v4.1 EAp2: Minimum Energy Performance
See LEEDuser’s guidance on NC-v4.1 EAp2 »
Prerequisite questions for Minimum Energy Performance v4.1
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Greenlab
Green Lab6 thumbs up
May 10, 2022 - 11:53 am
If we can use on-site renewables in v4.1, why does it appear on the MEPC summary tab "% Improvement Cost" the value of improvement without renewables?
Our result of Cost before and after subtracting renewables is -9.4% and 16.4%.
If we can use on-site renewables in v4.1, why does it appear on the MEPC summary tab "% Improvement GHG Emissions (exl.tier 2- and 3- renewables)" the exclusion of renewables?
Our result of GHG Emissions before and after subtracting renewables is 14.4% and 34.6%.
Jamy Bacchus
Associate PrincipalME Engineers
26 thumbs up
May 10, 2022 - 3:55 pm
In v4.1 it lists:
"Only on-site or on-campus renewable energy that meets ASHRAE Standard 90.1-2016 Section G 2.4.1 requirements for on-site renewable energy may be used to meet minimum ASHRAE Standard 90.1-2016 performance requirements."
In v4 it was:
"Projects must meet the minimum percentage savings before taking credit for renewable energy systems."
For v4.1 EAp2 you're allowed to choose the metric:
"Document the PCI, PCIt, and percentage improvement using metrics of cost or greenhouse gas (GHG) emissions."
Greenlab
Green Lab6 thumbs up
May 11, 2022 - 4:27 am
Thank you for your comment. I also understand it like that.
If I could show a picture I would. But in my MEPC (latest version) summary tab, the results for the prerequisite don't account for the renewables. If they did results would be 16.4% (Cost) and 34.6% (GHG Emissions), INSTEAD they show -9.4% (the opposite of an improvement) and 14.4% for GHG Emissions. This has grounded my doubts.