See all forum discussions about EBOM-2009 EAp2
 Subscribe to new posts about EBOM-2009 EAp2 Post a new question aboutEBOM-2009 EAp2
See LEEDuser’s guidance on EBOM-2009 EAp2»
FAQs about EAp2 :

We have installed submeters on our building but the utility bill includes energy use from several other buildings located on the same campus. How do we reconcile this during the LEED review process?

When is it possible to exclude up to 10% of the building from EAp2?

What do I do if the number of building occupants, operating hours, or vacant space changes during the performance period?

If you pursue the streamlined path for an Energy Star label, should the performance period for EAc6 match the 12-month time frame of the label?

How do I account for computers with multiple monitors on Portfolio Manager?

How should I treat vacant space on Portfolio Manager?

Our building includes a large laboratory space. Can our project benchmark under the Labs21 program?

We have an international project and the space type is eligible for an Energy Star rating. Can we pursue Case 1 to demonstrate compliance given the recently released alternative compliance paths for international projects?

We have a number of buildings on a single campus that we would like to certify at the same time. Is it possible to benchmark the buildings at the campus level?

I have a mixed-use building and am wondering if it is possible to pursue the prerequisite through Case 1. How do we proceed?

We have a building that consists of two attached structures and it’s unclear if we have to consider it a single building or if it should be certified as two separate buildings and benchmarked accordingly. How should we proceed?

How long is an Energy Star label valid to use with a streamlined approach for Case 1?

Our building includes heavy process loads that significantly increase the overall energy use in the building. If we submeter these loads, can we exclude this energy use for benchmarking purposes?

View answers »

Forum discussion

EBOM-2009 EAp2:Minimum Energy Efficiency Performance

Case 2 Calculator

Default Avatar
Peter Keithly
Principal
TEAM Commissioning Associates
LEEDuser Basic Member
3 thumbs up

We had to use the Case 2 calculator because our building was too small to qualify for an Energy Star rating. Can anyone tell me why using the LEED Case 2 calculator yields us 33 percentile points above the national average (good for 12 EAc1 points) when our statement of energy performance from Energy Star for the same usage period shows our comparison Source EUI performance as -40% (40% better than the National Median Source EUI)?

0
Post a reply

You rely on LEEDuser. Can we rely on you?

LEEDuser is supported by our premium members, not by advertisers.

Go premium for $15.95  »

Default Avatar
Peter Keithly
Principal
TEAM Commissioning Associates
LEEDuser Basic Member
3 thumbs up

Tue, 05/01/2012 - 15:09

To look at it from another perspective, consider if our building had been 4,999 square feet. We would still not be able to use the Energy Star rating system because we were under 5,000 square feet. Yet if we added only 1 square foot and changed nothing else, we would suddenly qualify for 3 additional points under EAc1. Yet we did not become more energy efficient, we only became a tiny (insignificant) bit larger. That does not seem fair to me. The Case 2 calculator should yield the same number of points as the Energy Star rating system when every other building operational and performance parameter remains the same. My point remains this: Use of the Case 2 calculator versus the Energy Star rating system clearly can result in significantly different EAc1 points when everything else is held constant. In my opinion, that is not fair. Any comments on this?
Default Avatar
Alexa Stone
ecoPreserve: Building Sustainability
LEEDuser Basic Member
101 thumbs up

Wed, 05/09/2012 - 00:06

Couldn't agree more Peter! USGBC and EnergyStar do not see eye to eye on this credit/prerequisite and this is just ONE of the reasons why. Although the offline calculator is based on the data that Energy Star provides it still does not compare exactly. Unfortunately, there is nothing you can do about the size of your building or the way that its benchmarked. The best thing to do is stick with the scenarios that gives you a better assessment and be sure to "have your ducks in a row" in case you get feedback from the reviewer.

Add new comment

To post a comment, you need to register for a LEEDuser Basic membership (free) or login to your existing profile.