% improvement = 100 x (baseline – proposed) / baseline.LEED, EPACT tax credits, utility programs, ASHRAE Standard 189.1, IgCC Used to rate building performance “beyond code”.Performance Rating Method - Appendix G.Requires no greater energy cost than a building that meets those prescriptive requirements.Used for minimum code compliance for buildings that do not meet 90.1 prescriptive requirements.Energy Cost Budget Method (ECB) - Chapter 11.Both compare the annual energy cost ($) of the proposed building to the baseline building Proposed Design Baseline Design.Both compare a proposed building design to a baseline building meeting the prescriptive requirements of the code.Standard 90.1 includes 2 performance paths.ANSI/ASHRAE/IES Standard 90.1-2013 Chapter 11 and Appendix G May 2014 – PNNL-SA-102543
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