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Amreica’s Enery Future: Technology and Transformation
FIGURE 2.5Estimates of the cost of conserved energy (CCE) and energy savings potential for electricity efficiency technologies in buildings in 2030. The CCEs for potentialenergy efficiency measures (numbered) are shown versus the ranges of potential energysavings for these measures. The total savings potential is 567 TWh per year in the residential sector and 705 TWh per year in the commercial sector. Commercial buildings (redsolid line) and residential buildings (blue solid line) are shown separately. For comparison, the national average 2007 retail price of electricity in the United States is shown forthe commercial sector (red dashed line) and the residential sector (blue dashed line). Formany of the technologies considered, on average the investments have positive paybackwithout additional incentives. CCEs include the costs for add-ons such as insulation. Forreplacement measures, the CCE accounts for the incremental cost—for example, betweenpurchasing a new but standard boiler and purchasing a new high-efficiency one. CCEs donot reflect the cost of programs to drive efficiency. All costs are shown in 2007 dollars.Sources: Data from Brown et al. (2008) andChapter 4inPart 2of this report.
CCE for electricity savings from commercial and residential buildings is shown in Figure 2.5. The range of CCE for electricity savings from commercial buildings is 0.5–8.4μ/kWh, with a weighted average of 2.7¢/kWh. However, nearly all of the efficiency savings are achievable at a CCE of 5¢/kWh or less. The range of CCE for electricity savings from residential buildings is 0.9–7.4¢/kWh, with a weighted average of 2.7¢/kWh. More than 80 percent of the potential savings are achievable at a CCE of 5¢/kWh or less. For comparison purposes, the average retail price of electricity in the residential and commercial sectors in 2007 was about