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

 Million 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 1.2 1.9 1.1 1.0

Households With Electric

Air-Conditioning Equipment ...................... 73.6 4.3 4.8 6.4 5.7 3.5

 Central Equipment Not Used ....................... 0.3 Q 0.1 (*) 0.1 29.0

 Room Air Conditioners Not Used ................ 0.7 Q Q Q 0.1 43.1

Households Using Electric

Air-Conditioning1 ........................................ 72.6 4.2 4.6 6.3 5.6 3.3

Type of Electric Air-Conditioning Used

 Central Air-Conditioning2 ............................ 47.5 1.3 3.2 4.8 4.9 5.4

 Without a Heat Pump ................................ 36.9 1.2 2.9 4.1 2.5 10.6

 With a Heat Pump ..................................... 10.6 0.1 0.3 0.7 2.4 21.2

 Room Air-Conditioning ................................ 25.2 3.0 1.4 1.6 0.7 10.7

 1 Unit ......................................................... 14.9 1.6 1.3 0.7 0.5 12.5

 2 Units ....................................................... 7.2 1.0 0.1 0.5 0.1 17.8

 3 or More Units .......................................... 3.0 0.5 Q 0.4 0.1 28.7

Number of Rooms AirConditioned in Summer 1997

 One or Two .................................................. 13.0 1.9 1.0 0.8 0.3 14.4

 Three ........................................................... 8.2 0.4 0.7 1.1 0.3 13.1

 Four ............................................................ 11.6 0.9 0.7 0.7 0.9 19.0

 Five or More ................................................ 39.8 1.0 2.2 3.7 4.1 10.5

Percentage of Rooms

Air-Conditioned

 100% ........................................................... 50.2 1.9 3.4 5.0 4.8 5.2

 50% to 99% ................................................. 11.4 0.8 0.5 0.9 0.6 16.9

 25% to 49% ................................................. 7.0 0.9 0.5 0.4 Q 17.8

 1% to 24% ................................................... 4.0 0.7 0.2 0.1 Q 15.5

Large Tree(s) that

Shade the Home

 Yes .............................................................. 35.5 1.5 1.7 3.2 3.2 9.7

 No ................................................................ 37.2 2.7 2.9 3.2 2.4 7.6

Central Air-Conditioner Age

(excludes systems for more than one

housing unit)

 Less than 5 Years ....................................... 13.1 0.5 0.6 1.6 1.0 10.5

 5 to 9 Years ................................................. 14.1 0.4 1.1 1.1 1.8 16.7

 10 to 19 Years ............................................. 12.8 0.1 0.9 1.3 1.5 14.6

 20 Years or More ......................................... 3.9 Q 0.5 0.2 0.3 16.6

 Don’t Know .................................................. 2.7 Q 0.1 0.3 0.3 28.3

Central Air-Conditioning Use

 Only a Few Times ....................................... 12.6 0.5 1.7 0.5 0.7 15.2

 Quite a Bit .................................................... 10.5 0.4 0.8 0.6 0.7 13.5

 All Summer .................................................. 24.4 0.4 0.7 3.6 3.5 9.1

Pays for Electricity for Central

Air-Conditioning

 Yes .............................................................. 46.2 1.2 3.0 4.5 4.8 5.8

 No ................................................................ 1.1 Q Q Q 0.1 43.9

See footnotes at end of table.

Energy Information Administration/Housing Characteristics 1997

Table Layout at 12:34:03 PM on 11/10/99
Table HC4-7a. Air Conditioning by Four Most Populated States, 

 Million 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 1.2 1.9 1.1 1.0

Age of Most-Used Room Air Conditioner

 Less than 5 Years ....................................... 8.7 1.0 0.6 0.7 0.3 12.8

 5 to 9 Years ................................................. 6.9 0.9 0.3 0.5 0.1 21.3

 10 or 19 Years ............................................. 5.7 0.7 0.3 0.2 0.2 15.6

 20 or More Years ......................................... 2.0 0.1 0.2 Q Q 20.6

 Don’t Know .................................................. 1.9 0.3 0.2 0.1 0.1 26.9

Pays for Electricity for Room

Air-Conditioning

 Yes .............................................................. 23.4 2.7 1.2 1.5 0.6 12.2

 No ................................................................ 1.7 0.3 Q 0.1 Q 32.6

Room Air-Conditioning Use

 Only a Few Times ....................................... 13.2 1.8 1.0 0.5 0.3 12.6

 Quite a Bit .................................................... 6.5 0.8 0.2 0.4 0.2 16.6

 All Summer .................................................. 5.5 0.4 0.2 0.7 0.3 23.1

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.

(*) = Value rounds to zero in the units displayed.

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. 

• 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 12:34:03 PM on 11/10/99