Home > Households, Buildings & Industry > Energy Efficiency Page > Energy Intensities > Table 5c


U.S. Residential Housing Site Energy
Intensity


Page Last Revised: July 2009

Table 5c. U.S. Residential Energy Intensity Using Site 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

65

64

60

63

58

54

55

61

45

41

Mobile Home

100

92

83

87

89

83

84

80

71

66

Single-Family Detached

59

60

55

57

53

51

52

58

42

37

Single-Family Attached

65

55

63

59

52

52

54

64

42

43

Apartments in Buildings with 2 to 4 Units

103

88

85

84

81

80

83

93

56

78

Apartments in Buildings with 5 or More Units

90

80

85

87

80

62

60

57

48

62

Total Northeast

70

67

64

65

64

57

60

69

48

50

Mobile Home

108

103

128

113

119

90

95

92

85

87

Single-Family Detached

55

56

51

54

54

50

53

62

44

43

Single-Family Attached

71

58

68

64

63

55

59

80

48

48

Apartments in Buildings with 2 to 4 Units

113

102

90

90

88

91

84

105

55

96

Apartments in Buildings with 5 or More Units

132

115

122

121

106

70

78

80

59

94

Total Midwest

73

75

65

71

62

60

62

70

49

44

Mobile Home

136

132

97

108

109

101

107

126

99

87

Single-Family Detached

67

71

60

65

56

55

56

65

47

41

Single-Family Attached

70

71

57

61

46

60

61

78

43

41

Apartments in Buildings with 2 to 4 Units

115

90

93

95

95

91

116

122

70

76

Apartments in Buildings with 5 or More Units

89

93

95

111

100

68

76

72

49

68

Total South

61

57

56

56

55

50

52

54

42

35

Mobile Home

91

77

73

68

77

69

70

65

62

62

Single-Family Detached

57

56

53

54

53

48

51

54

41

31

Single-Family Attached

62

49

60

51

40

42

51

46

38

44

Apartments in Buildings with 2 to 4 Units

81

70

74

73

67

57

54

60

46

65

Apartments in Buildings with 5 or More Units

72

53

76

70

69

55

49

44

47

50

Total West

54

57

55

57

50

51

46

51

40

39

Mobile Home

95

82

75

85

74

77

81

78

65

63

Single-Family Detached

51

56

54

55

47

48

45

50

38

37

Single-Family Attached

52

46

54

47

50

56

42

50

38

37

Apartments in Buildings with 2 to 4 Units

78

61

68

62

59

62

62

58

47

60

Apartments in Buildings with 5 or More Units

51

56

47

57

56

57

42

43

40

44

1.The Btu value of energy at the point it enters the home, building, or establishment, sometimes referred to as "delivered" 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.