Table HC4-9a. Air Conditioning by Northeast Census Region, 

 Million U.S. Households, 2001

Air Conditioning

Characteristics

RSE Column Factor:

Total

U.S.

Northeast Census Region

RSE

Row

Factors

Total

Census Division

Middle Atlantic New England

0.5 1.0 1.2 1.8

Households With Electric

Air-Conditioning Equipment ...................... 82.9 14.5 11.3 3.2 3.3

 Air Conditioners Not Used ........................... 2.1 0.3 0.3 Q 28.3

Households Using Electric

Air-Conditioning1 ........................................ 80.8 14.2 11.1 3.2 3.4

Type of Electric Air-Conditioning Used

 Central Air-Conditioning2 ............................ 57.5 5.7 4.9 0.8 8.9

 Without a Heat Pump ................................ 46.2 5.2 4.5 0.7 9.2

 With a Heat Pump ..................................... 11.3 0.4 0.4 Q 26.0

 Room Air-Conditioning ................................ 23.3 8.5 6.1 2.4 5.6

 1 Unit ......................................................... 12.8 4.4 2.9 1.4 8.5

 2 Units ....................................................... 7.5 2.8 2.1 0.7 7.4

 3 or More Units .......................................... 3.0 1.3 1.1 0.3 13.2

Number of Rooms AirConditioned in Summer 2001

 One or Two .................................................. 12.3 4.9 3.5 1.4 6.7

 Three ........................................................... 9.2 2.0 1.5 0.5 11.4

 Four ............................................................ 12.0 1.8 1.5 0.3 13.6

 Five or More ................................................ 47.3 5.5 4.6 0.9 8.2

Percentage of Rooms

Air-Conditioned

 100% ........................................................... 58.8 7.1 6.1 1.0 7.1

 50% to 99% ................................................. 12.1 2.7 1.9 0.9 10.1

 25% to 49% ................................................. 6.4 2.7 2.2 0.6 10.6

 1% to 24% ................................................... 3.5 1.6 0.9 0.7 10.2

Large Tree(s) that

Shade the Home

 Yes .............................................................. 41.5 6.2 4.6 1.6 6.5

 No ................................................................ 39.3 8.0 6.4 1.6 4.9

Central Air-Conditioner Age

(excludes systems for more than one

housing unit)

 Less than 2 Years ....................................... 6.1 0.6 0.6 Q 15.4

 2 to 4 Years ................................................. 10.1 0.7 0.6 Q 14.3

 5 to 9 Years ................................................. 15.4 1.6 1.4 0.2 16.5

 10 to 19 Years ............................................. 15.0 1.7 1.5 0.2 16.2

 20 Years or More ......................................... 5.7 0.6 0.5 Q 17.6

 Don’t Know .................................................. 3.7 Q Q Q 22.0

Central Air-Conditioning Use

 Only a Few Times ....................................... 16.8 2.8 2.4 0.4 11.7

 Quite a Bit .................................................... 12.1 1.3 1.2 Q 14.2

 All Summer .................................................. 28.4 1.6 1.4 0.2 15.0

See footnotes at end of table.

Energy Information Administration

2001 Residential Energy Consumption Survey: Housing Characteristics Tables
Table HC4-9a. Air Conditioning by Northeast Census Region, 

 Million U.S. Households, 2001 (Continued)

Air Conditioning

Characteristics

RSE Column Factor:

Total

U.S.

Northeast Census Region

RSE

Row

Factors

Total

Census Division

Middle Atlantic New England

0.5 1.0 1.2 1.8

Pays for Electricity for Central

Air-Conditioning

 Yes .............................................................. 55.5 5.5 4.7 0.8 8.9

 No ................................................................ 2.0 Q Q Q 30.9

Age of Most-Used Room Air Conditioner

 Less than 2 Years ....................................... 3.1 1.1 0.7 0.3 17.5

 2 to 4 Years ................................................. 5.3 2.3 1.8 0.5 9.7

 5 to 9 Years ................................................. 6.4 2.7 1.9 0.8 11.1

 10 or 19 Years ............................................. 4.3 1.4 1.0 0.4 11.4

 20 or More Years ......................................... 2.0 0.4 0.3 Q 25.5

 Don’t Know .................................................. 2.2 0.6 0.4 0.2 23.6

Room Air-Conditioning Use

 Only a Few Times ....................................... 13.6 5.8 4.1 1.8 6.5

 Quite a Bit .................................................... 5.0 1.7 1.3 0.4 13.9

 All Summer .................................................. 4.7 1.0 0.8 0.2 18.5

Pays for Electricity for Room

Air-Conditioning

 Yes .............................................................. 21.9 7.9 5.7 2.2 6.1

 No ................................................................ 1.5 0.6 0.5 0.2 25.8

1 The number of households, where the end use is electric air-conditioning, does not include households that did not use their equipment (2.1 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 The 2001 RECS reported 800,000 households having both central air-conditioning and room/wall air-conditioners, with 600,000 households using both central

air-conditioning and 200,000 households using only room/wall air-conditioners. These room/wall air-conditioners are not included in the count of 23.3 million

households using room/wall air-conditioners. Note: This applies to all occurrences of central air-conditioning.

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 2001 Residential Energy Consumption Survey.

Energy Information Administration

2001 Residential Energy Consumption Survey: Housing Characteristics Tables