Contents
Introduction 5
Type of housing 6
Size effect 7
Regional effect 9
Weather effect 11
Energy type change 11
Results 13
Decomposition of national effects for 1980-2009 13
Total energy 13
Total electricity 15
Natural gas 15
Decomposition of national effects changes for sub-periods 1980-1990, 1990-2001, and 2001-2009 17
Total energy 17
Total electricity 18
Natural gas 18
Summary 20
Appendix A 21
References 23
Figure 1. Distribution of households, total square footage, and energy consumption by housing type, 1980 and 2009 6
Figure 2. Energy consumption intensity by type of housing: 1980 and 2009 and percentage change from 1980 7
Figure 3. Average size of homes by housing-type 1980 and 2009 8
Figure 4. Growth in average living space per household by housing type, 1980-2009 8
Figure 5. Household distribution by Census regions, 1980, 1990, and 2009 9
Figure 6. Aggregate Energy Consumption Intensity by Census region in 2009 and percent change from 1980 10
Figure 7. Distribution of fuel sources in U.S. households 1980, 1990, and 2009 11
Figure 8. Electricity intensity consumption per household by end uses, 1980, 1990, and 2009 12
Figure 9. Penetration of selected electrical appliances in U.S. households, 1980, 1990, and 2009 12
Figure 10. Decomposition of change in total energy consumption, 1980-2009 14
Figure 11. Decomposition of change in electricity consumption, 1980-2009 15
Figure 12. Decomposition of change in space heating natural gas consumption, 1980-2009 16
Figure 13. Decomposition of total energy changes for sub-periods, 1980-1990, 1990-2001, and 2001-2009 17
Figure 14. Decomposition of total U.S. household electricity consumption changes for sub-periods, 1980-1990, 1990-2001, and 2001-2009 18
Figure 15. Decomposition of space heating natural gas consumption changes for 1980-1990, 1990-2001, and 2001-2009 19