PNNL Pacific Northwest National Laboratory UPV Uniform Present Value SWH Service Water Heating PNNL-25041 Cost-Effectiveness of ASHRAE Standard 90.1-2013 2 State of Idaho Highlights Moving to the ASHRAE Standard 90.1-2013 (ASHRAE 2013) edition from Standard 90.1-2010 (ASHRAE 2010) is cost-effective for the State of Idaho. The table below shows the state-wide economic impact of upgrading to Standard 90.1-2013 in terms of the annual energy cost savings in dollars per square foot, additional

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... uction cost per square foot required by the upgrade, and life-cycle cost (LCC) per square foot. These results are weighted averages for all building types in all climate zones in the state, based on weightings shown in Table 4 . The methodology used for this analysis is consistent with the methodology used in the national cost-effectiveness analysis 1 . Additional results and details on the methodology are presented in the following sections. The report provides analysis of two LCC scenarios:  Scenario 1, representing publicly-owned buildings, considers initial costs, energy costs, maintenance costs, and replacement costs-without borrowing or taxes.  Scenario 2, representing privately-owned buildings, adds borrowing costs and tax impacts. State of Idaho Cost-Effectiveness Results for ASHRAE Standard 90.1-2013 in Idaho This section summarizes the cost-effectiveness analysis results. Life-Cycle Cost (LCC) savings is the primary measure DOE uses to assess the economic impact of building energy codes. Savings are computed for two scenarios:  Scenario 1 (publicly-owned) includes costs for initial equipment and construction, energy, maintenance and replacement and does not include loans or taxes.