Please, correct me if I am wrong!
As I understand it, the energy simulation requirements of EAp2 and EAc1 are NOT identical. If I am correct, for EAp2 you:
Model the proposed design in accordance with Section 11.3 of Standard 90.1-2007 and
Model the baseline building to the building performance rating method in Appendix G.
Then, for EAc1 you:
Model the proposed design in accordance with Performance Rating (PR) Method in Appendix G of Standard 90.1-2007 and
Model the baseline building using the same PR Method as the proposed building.
Calculate the performance improvement of the proposed design compared to the baseline building.
Please tell me if this is not correct. I am not an engineer but this is my understanding of the requirements in LEED-NC 2009.
Thank you!
Christopher Schaffner
CEO & FounderThe Green Engineer
LEEDuser Expert
963 thumbs up
February 8, 2010 - 12:28 pm
You may be remembering how things were in older versions of LEED, but for LEED 2009, the modeling protocols are identical. Both the pre-req (EAp2) and the credit (EAc1) reference only the building performance rating method in Appendix G of 90.1-2007.
Back in the old days, you needed to use the Energy Cost Budget method to show compliance with EAp2, but used Appendix G for EAc1, although the reviewers generally let you slide on that,