Forum discussion
EBOM-2009 EAp2: Minimum Energy Efficiency Performance
Is there any way to access case 2 calculators prior to registering for a project to determine feasibility? they are not in the reference guide?
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Our building includes a large laboratory space. Can our project benchmark under the Labs21 program?
How long is an Energy Star label valid to use with a streamlined approach for Case 1?
When is it possible to exclude up to 10% of the building from EAp2?
How do I account for computers with multiple monitors on Portfolio Manager?
sophie durandeux
1 thumbs up
August 17, 2009 - 9:08 am
The calculators are available on the USGBC's website at http://www.usgbc.org/DisplayPage.aspx?CMSPageID=2054
To access this page you need to have a USGBC account.
Home / LEED / LEED Resources / Registered Project Tools / LEED 2009 for Existing Buildings: Operations & Maintenance
Ambra Francisci
3 thumbs up
April 11, 2011 - 6:31 am
The disadvantage of using Case 2 calculator
Hello!
I am currently performing pre-assessments for a whole portfolio of buildings located in Europe.
I would like to showcase two different buildings, one eligible for case 1, and one that is a mixed usage case 2 option 1.
Building 1 is 90% Office
Electricity: 111 kWh/m²a
District Heat: 119 kWh/m²a
CSEI: 215 kBtu/Sq. Ft.
Building 2 is 43% Office, 27% recreation, 10% restaurant, 10% school k-12 and the rest is other. It just barely misses the 50% office mark.
Consumption:
Electricity: 97 kWh/m²a
District Steam: 68 kWh/m²a
CSEI 152 kBtu/Sq. Ft.
The interesting fact is that Building one gets a rating of 82 in the portfolio manager thus earning 12 points for the building, while building 2, according to the EA Prerequisite 2 / Credit 1 Case 2 Calculator, is only 20% above the national average, barley fulfilling pr2 and earning 0 points for the building.
This seems unreasonable disadvantages for the mixed building, which has much lower kWh/m²a consumption, and doesn’t represent its green building status well, compared to the other office building.
-Is this a preferred effect for mixed building uses?
-Is there a way to earn more credit points with a mixed building usage?
No on or offsite renewable energy sources, or high % of vacant spaces are present in either building, that would interfere with the comparison. Both locations are in urban areas of Europe. (England and Germany)