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32. 1997 Economic Census
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1219. Heating Equipment and Fuels for Occupied Units
[As of fall. (93,147 represents 93,147,000) Based on American Housing Survey. See Appendix III]
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NUMBER (1,000)
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PERCENT DISTRIBUTION
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TYPE OF EQUIPMENT OR FUEL
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1991
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1993
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1995
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1997
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1999
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1991
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1993
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1995
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1997
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1999
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Occupied units, total
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93,147
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94,724
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97,692
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99,487
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102,803
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100.0
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100.0
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100.0
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100.0
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100.0
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Heating equipment:
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Warm air furnace
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49,423
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51,248
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53,165
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58,603
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62,018
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53.1
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54.1
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54.4
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58.9
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60.3
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Heat pumps
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7,638
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8,422
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9,406
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11,101
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10,992
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8.2
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8.9
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9.6
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11.2
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10.7
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Steam or hot water
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13,929
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13,657
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13,669
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12,929
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13,153
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15.0
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14.4
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14.0
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13.0
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12.8
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Floor, wall, or pipeless furnace
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4,291
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4,746
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4,963
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5,588
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5,310
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4.6
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5.0
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5.1
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5.6
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5.2
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Built-in electric units
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6,755
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6,722
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7,035
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4,531
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4,939
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7.3
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7.1
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7.2
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4.6
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4.8
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Room heaters with flue
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2,549
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1,766
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1,620
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1,584
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1,624
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2.7
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1.9
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1.7
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1.6
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1.6
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Room heaters without flue
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2,111
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1,597
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1,642
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1,754
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1,790
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2.3
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1.7
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1.7
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1.8
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1.7
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Fireplaces, stoves, portable heaters or other
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5,590
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5,654
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5,150
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2,780
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2,434
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6.0
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6.0
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5.3
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2.8
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2.4
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