Table 4.  Change in Projected Average Efficiencies of Newly Purchased
Residential Equipment in Carbon Reduction Cases Relative to the
Reference Case, 2010
(Percent)

Technology

1990+24%

1990+9%

1990-3%

Air-Source Heat Pump

1.3

3.6

5.7

Electric Water Heater

0.3

2.4

13.6

Natural Gas Water Heater

1.1

3.7

4.8

Building Shell

1.0

3.3

5.5

Source: Office of Integrated Analysis and Forecasting, National Energy Modeling System runs KYBASE.D080398A, FD24ABV.D080398B, FD09ABV. D080398B, and FD03BLW.D080398B.