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Table 5c. U.S. Residential Energy Intensity Using Site Energy  
by Census Region and Type of Housing Unit, 1980-2001(Thousand Btu per Square Foot)

Type of Housing Unit  and Census Region                               Survey Years               Excel Worksheet (xls)

1980

1981

1982

1984

1987

1990

1993

1997
2001

U.S. Total

65

64

60

63

58

54

55

61
45

Mobile Home

100

92

83

87

89

83

84

80
71

Single-Family Detached

59

60

55

57

53

51

52

58
42

Single-Family Attached

65

55

63

59

52

52

54

64
42

Apartments in Buildings with 2 to 4 Units

103

88

85

84

81

80

83

93
56

Apartments in Buildings with 5 or More Units

90

80

85

87

80

62

60

57
48

Total Northeast

70

67

64

65

64

57

60

69
48

Mobile Home

108

103

128

113

119

90

95

92
85

Single-Family Detached

55

56

51

54

54

50

53

62
44

Single-Family Attached

71

58

68

64

63

55

59

80
48

Apartments in Buildings with 2 to 4 Units

113

102

90

90

88

91

84

105
55

Apartments in Buildings with 5 or More Units

132

115

122

121

106

70

78

80
59

Total Midwest

73

75

65

71

62

60

62

70
49

Mobile Home

136

132

97

108

109

101

107

126
99

Single-Family Detached

67

71

60

65

56

55

56

65
47

Single-Family Attached

70

71

57

61

46

60

61

78
43

Apartments in Buildings with 2 to 4 Units

115

90

93

95

95

91

116

122
70

Apartments in Buildings with 5 or More Units

89

93

95

111

100

68

76

72
49

Total South

61

57

56

56

55

50

52

54
42

Mobile Home

91

77

73

68

77

69

70

65
62

Single-Family Detached

57

56

53

54

53

48

51

54
41

Single-Family Attached

62

49

60

51

40

42

51

46
38

Apartments in Buildings with 2 to 4 Units

81

70

74

73

67

57

54

60
46

Apartments in Buildings with 5 or More Units

72

53

76

70

69

55

49

44
47

Total West

54

57

55

57

50

51

46

51
40

Mobile Home

95

82

75

85

74

77

81

78
65

Single-Family Detached

51

56

54

55

47

48

45

50
38

Single-Family Attached

52

46

54

47

50

56

42

50
38

Apartments in Buildings with 2 to 4 Units

78

61

68

62

59

62

62

58
47

Apartments in Buildings with 5 or More Units

51

56

47

57

56

57

42

43
40

Note: In the 1997 RECS the floor area of the housing unit was not measured. The heated floorspace was estimated using regression analysis.
Prior 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, and 2001.

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For specific questions about the "Residential Energy Intensity Using Site Energy, please contact:

Stephanie J. Battles
stephanie.battles@eia.doe.gov
Phone: 202-586-7237
Fax:  202-586-0018

Release Date: September 2, 2004 

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