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U.S. Residential Housing Primary Energy
Intensity

Page Last Revised: July 2009

Table 7c. U.S. Residential Energy Intensity Using Primary Energy1 by Census Region and Type of Housing Unit, 1980-2005
(Thousand Btu per Square Foot)

Type of Housing Unit and Census Region 

1980

1981

1982

1984

1987

1990

1993

19972

2001
2005

U.S. Total

101
101
96
98
94
91
92
103
79
74

Mobile Home

182
162
155
161
162
151
163
162
151
139

Single-Family Detached

92
93
87
91
87
85
86
99
75
67

Single-Family Attached

91
81
91
90
84
91
91
102
69
73

Apartments in Buildings with 2 to 4 Units

134
135
123
114
116
115
118
139
91
123

Apartments in Buildings with 5 or More Units

140
148
146
133
128
112
106
105
98
115

Total Northeast

93
95
86
89
89
81
83
97
71
73

Mobile Home

168
166
183
172
177
151
153
150
141
127

Single-Family Detached

76
77
71
77
78
72
75
90
66
63

Single-Family Attached

90
77
90
84
86
77
82
110
66
71

Apartments in Buildings with 2 to 4 Units

133
138
113
111
111
115
106
135
76
127

Apartments in Buildings with 5 or More Units

172
184
167
157
142
101
111
112
96
133

Total Midwest

102
104
95
100
90
89
92
103
77
72

Mobile Home

198
172
171
182
179
161
174
198
165
143

Single-Family Detached

95
97
87
92
83
82
84
96
74
68

Single-Family Attached

108
93
105
87
70
93
86
108
65
64

Apartments in Buildings with 2 to 4 Units

139
130
123
119
120
118
146
166
101
115

Apartments in Buildings with 5 or More Units

132
151
143
145
136
112
124
115
91
111

Total South

113
108
106
105
108
103
105
114
91
78

Mobile Home

191
160
154
153
169
154
167
156
160
150

Single-Family Detached

106
101
97
99
102
98
100
112
85
69

Single-Family Attached

95
89
98
109
99
104
110
101
81
95

Apartments in Buildings with 2 to 4 Units

133
163
148
125
131
121
123
132
112
141

Apartments in Buildings with 5 or More Units

140
132
180
140
142
130
114
109
121
120

Total West

131
97
92
94
85
89
80
91
72
70

Mobile Home

160
155
133
146
124
132
147
154
128
120

Single-Family Detached

83
93
88
90
80
82
77
88
67
65

Single-Family Attached

86
78
81
64
78
105
75
87
63
63

Apartments in Buildings with 2 to 4 Units

130
107
113
102
101
101
107
98
87
106

Apartments in Buildings with 5 or More Units

99
116
100
100
95
102
81
88
82
91

1. The amount of site consumption, plus losses that occur in the generation, transmission, and distribution of energy.
2. In the 1997 RECS the floor area of the housing unit was not measured. The heated floorspace was estimated using regression analysis. Except for 1997, estimates include all the floor area of the housing unit that was enclosed from the weather.
Sources: Energy Information Administration, Residential Energy Consumption Surveys 1980, 1981, 1982, 1984, 1987, 1990, 1993, 1997, 2001, and 2005.