LEED-NC v2.2 and Oregon Energy Code 2005
ASHRAE 90.1-2004 is the technical standard referenced as a basis for energy performance credits within LEED-NC v2.2. The Energy and Atmosphere Technical Advisory Group has evaluated the equivalency between ASHRAE 90.1-2004 and Oregon Energy Code 2005. Based on that evaluation, the following has been approved:
USGBC deems Oregon Energy Code 2005 equivalent to ASHRAE 90.1-2004 for projects within the state of Oregon, provided that the mandatory provisions of ASHRAE 90.1-2004 are met.
This equivalency is for the purpose of certification of the following LEED-NC v2.2 credits:
• Minimum Energy Performance – EAp2
• Optimize Energy Performance – EAc1
• On-Site Renewable Energy – EAc2
• Green Power – EAc6
Projects using Oregon Energy Code 2005 which perform a whole building energy simulation for EAc1 shall use the Oregon Building Energy Performance Rating Method to determine a percentage improvement (http://www.oregon.gov/ENERGY/CONS/SEED/docs/AppendixL.pdf).
LEED credit will be awarded based on LEED-NC v2.2 performance thresholds established in the LEED-NC v2.2 Reference Guide for ASHRAE 90.1-2004. Also, when using Oregon Energy Code 2005, please note that the LEED performance thresholds are based on energy cost savings. LEED-NC v2.2 projects do not need to provide justification or support of Oregon Energy Code 2005 equivalence when applying for LEED-NC v2.2 certification. However, projects will need to provide the following signed statement: “The project meets all the mandatory provisions (Sections 5.4, 6.4, 7.4, 8.4, 9.4, and 10.4) of ASHRAE/IESNA Standard 90.1-2004 (without amendments).”
LEED-NC v2.1 projects can use Oregon Energy Code 2005 only if credit substitution is used (http://www.usgbc.org/ShowFile.aspx?DocumentID=1704) and if the above guidelines are followed.