Table HC4-7b. Air Conditioning by Four Most Populated States, 

 Percent of U.S. Households, 1997

Air Conditioning

Characteristics

RSE Column Factor:

Total

Four Most Populated States

RSE

Row

Factors

New York California Texas Florida

0.4 1.3 1.4 1.2 1.2

Households With Electric

Air-Conditioning Equipment ...................... 100.0 100.0 100.0 100.0 100.0 0.0

 Central Equipment Not Used ....................... 0.5 Q 2.9 0.6 1.2 28.9

 Room Air Conditioners Not Used ................ 1.0 Q Q Q 1.2 40.5

Households Using Electric

Air-Conditioning1 ........................................ 98.7 99.4 96.4 99.4 98.3 NE

Type of Electric Air-Conditioning Used

 Central Air-Conditioning2 ............................ 64.5 29.5 67.0 74.8 85.5 4.7

 Without a Heat Pump ................................ 50.2 27.4 60.0 64.1 43.7 8.6

 With a Heat Pump ..................................... 14.4 2.1 7.0 10.7 41.8 21.2

 Room Air-Conditioning ................................ 34.2 69.9 29.4 24.7 12.8 9.0

 1 Unit ......................................................... 20.2 36.4 26.8 10.5 8.2 11.4

 2 Units ....................................................... 9.8 22.6 2.3 8.3 2.6 16.8

 3 or More Units .......................................... 4.1 10.9 Q 5.8 2.0 26.8

Number of Rooms AirConditioned in Summer 1997

 One or Two .................................................. 17.7 45.5 20.4 12.4 5.4 14.0

 Three ........................................................... 11.2 8.7 14.0 17.2 5.8 12.8

 Four ............................................................ 15.7 20.8 14.9 11.7 15.7 18.8

 Five or More ................................................ 54.2 24.4 47.1 58.0 71.4 8.7

Percentage of Rooms

Air-Conditioned

 100% ........................................................... 68.3 43.9 70.6 78.7 84.3 4.0

 50% to 99% ................................................. 15.5 18.5 10.3 13.3 11.2 16.8

 25% to 49% ................................................. 9.5 20.4 10.6 6.1 Q 18.2

 1% to 24% ................................................... 5.4 16.6 4.8 1.3 Q 17.5

Large Tree(s) that

Shade the Home

 Yes .............................................................. 48.2 35.9 35.6 49.4 56.8 7.0

 No ................................................................ 50.5 63.4 60.7 50.1 41.5 6.0

Central Air-Conditioner Age

(excludes systems for more than one

housing unit)

 Less than 5 Years ....................................... 17.8 12.8 11.9 25.2 16.9 9.7

 5 to 9 Years ................................................. 19.2 10.3 24.0 17.9 30.8 15.8

 10 to 19 Years ............................................. 17.4 3.3 19.1 20.0 25.9 13.7

 20 Years or More ......................................... 5.4 Q 9.8 3.4 5.4 15.6

 Don’t Know .................................................. 3.7 Q 1.5 5.1 5.9 29.0

Central Air-Conditioning Use

 Only a Few Times ....................................... 17.1 10.6 35.2 8.2 11.5 14.4

 Quite a Bit .................................................... 14.2 10.2 17.4 9.7 11.6 12.8

 All Summer .................................................. 33.2 8.6 14.3 56.9 62.4 7.4

Pays for Electricity for Central

Air-Conditioning

 Yes .............................................................. 62.8 27.8 63.5 70.6 84.3 4.9

 No ................................................................ 1.5 Q Q Q 1.2 41.7

See footnotes at end of table.

Energy Information Administration/Housing Characteristics 1997

Table Layout at 12:35:26 PM on 11/10/99
Table HC4-7b. Air Conditioning by Four Most Populated States, 

 Percent of U.S. Households, 1997 (Continued)

Air Conditioning

Characteristics

RSE Column Factor:

Total

Four Most Populated States

RSE

Row

Factors

New York California Texas Florida

0.4 1.3 1.4 1.2 1.2

Age of Most-Used Room Air Conditioner

 Less than 5 Years ....................................... 11.9 23.3 11.6 11.2 4.6 13.5

 5 to 9 Years ................................................. 9.3 20.2 5.3 8.0 1.9 19.4

 10 or 19 Years ............................................. 7.7 16.8 5.8 3.5 4.0 14.7

 20 or More Years ......................................... 2.7 3.5 3.3 Q Q 23.1

 Don’t Know .................................................. 2.6 6.1 3.4 1.5 2.2 25.6

Pays for Electricity for Room

Air-Conditioning

 Yes .............................................................. 31.8 63.4 25.4 23.1 11.2 10.7

 No ................................................................ 2.4 6.5 4.0 1.5 Q 32.1

Room Air-Conditioning Use

 Only a Few Times ....................................... 17.9 43.2 20.2 7.6 5.0 12.0

 Quite a Bit .................................................... 8.8 17.9 5.1 6.5 2.9 15.2

 All Summer .................................................. 7.5 8.8 4.1 10.6 4.9 20.7

1 The number of households, where the end use is electric air-conditioning, does not include households that did not use their equipment (0.9 million). It does include

the small number of households where the fuel for central air-conditioning equipment was something other than electricity; those households were treated as if the fuel

was electricity. 2 Includes 642,000 households using room/wall air-conditioners in addition to central air-conditioning. These are excluded from the count of 25.2 million households

using only room air-conditioners.

NE = RSE row factor not estimated because RSE’s for all statistics in this row are between 0.0 and 1.0 percent.

Q = Data withheld either because the Relative Standard Error (RSE) was greater than 50 percent or fewer than 10 households were sampled.

Notes: • To obtain the RSE percentage for any table cell, multiply the corresponding column and row factors. • Because of rounding, data may not sum to totals. 

• Percentages are calculated on unrounded numbers. • See "Glossary" for definition of terms used in this report.

Source: Energy Information Administration, Office of Energy Markets and End Use, Forms EIA-457 A, B, C of the 1997 Residential Energy Consumption Survey.

Energy Information Administration/Housing Characteristics 1997

Table Layout at 12:35:26 PM on 11/10/99