The second change is that the baseline design is now fixed at a stable level of performance set approximately equal to the 2004 code. Using this new version of Appendix G to show compliance with the 2016 edition of the standard, the proposed building design needs to have a performance cost index (PCI) less than targets shown in a new table based on building type and climate zone. This prevents modelers from having to develop separate building models for code compliance and beyond code programs. First, it allows Appendix G to be used as a third path for compliance with the standard in addition to rating beyond code building performance. Appendix G, the Performance Rating Method in ASHRAE Standard 90.1 has been updated to make two significant changes for the 2016 edition, to be published in October of 2016.
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