Offering increased flexibility for industry, Standard 90.1-2013 Appendix G: Performance Rating Method – excerpt from ANSI/ASHRAE/IES Standard 90.1 (I-P), Energy Standard for Buildings Except Low-Rise Residential Buildings – gives users of their energy efficiency standard immediate access to selected addenda slated to be published in 2016 standard. Majority of this document is comprised of addendum bm, which allows Appendix G to be used as compliance path within the standard.