Table HC7-1a. Home Office Equipment by Climate Zone, 

 Million U.S. Households, 2001

Home Office Equipment

RSE Column Factor:

Total

Climate Zone1

RSE

Row

Factors

Fewer than 2,000 CDD and --

2,000 CDD

or More

and Fewer

than

4,000 HDD

More than

7,000 HDD

5,500 to

7,000 HDD

4,000 to

5,499 HDD

Fewer than

4,000 HDD

0.4 1.9 1.1 1.2 1.1 1.0

Total ............................................... 107.0 9.2 28.6 24.0 21.0 24.1 7.9

Households Using 

Office Equipment .......................... 96.2 8.4 26.2 21.1 19.0 21.5 7.8

Personal Computers2 ................... 60.0 5.7 16.7 13.1 12.1 12.6 7.4

 Number of Desktop PCs

 1 .................................................. 45.1 4.2 12.8 9.6 8.8 9.6 7.8

 2 or more .................................... 9.1 0.8 2.4 2.3 2.0 1.7 12.1

 Number of Laptop PCs

 1 .................................................. 12.0 0.9 3.1 2.6 2.8 2.6 12.3

 2 or more .................................... 2.2 Q 0.6 0.6 0.3 0.6 27.8

 Have Access to Internet ............. 50.7 4.7 14.5 10.9 10.0 10.5 7.6

 Hours PCs Turned

 On Each Week 

 Less than 2 hours ....................... 10.3 1.0 2.7 2.2 1.9 2.6 13.2

 2 to 15 hours ............................... 26.3 2.3 7.5 5.7 5.5 5.3 8.9

 16 to 40 hours ............................. 12.2 1.2 3.3 2.9 2.5 2.3 12.4

 More than 40 hours ..................... 5.7 0.7 1.7 1.1 1.0 1.2 15.6

 On All the time ............................ 5.6 0.5 1.5 1.2 1.1 1.2 17.2

 How PC is Used

 15 hours a Week or Less ............ 36.6 3.2 10.2 7.9 7.4 7.9 8.4

 16 hours a Week or More ........... 23.4 2.4 6.5 5.2 4.6 4.7 9.9

 Personal Use Only .................... 14.0 1.6 4.2 2.7 2.6 2.8 12.8

 Business Use Only ................... 2.1 0.3 0.4 0.5 0.5 0.4 20.8

 Both Personal and Business ..... 7.3 0.5 1.9 1.9 1.5 1.5 13.7

 Business Use of PC

 Other Business Use .................... 5.8 0.5 1.3 1.5 1.5 1.0 14.9

 Used for Telecommuting ............. 3.6 0.2 1.0 0.9 0.5 0.9 19.4

 1 to 4 Days per Week ............... 2.0 Q 0.7 0.6 0.2 0.3 27.1

 5 to 7 Days per Week ............... 1.6 Q 0.3 0.3 0.3 0.6 31.1

 Printer

 Attached to PC ............................ 52.8 5.0 14.9 11.3 10.6 11.0 7.7

 With Built-in Fax/Copier .............. 12.6 0.8 3.5 3.2 2.4 2.7 11.4

 Without Built-in Fax/Copier ......... 40.2 4.2 11.4 8.1 8.2 8.3 8.7

Other Office Equipment

 Cell/Mobile Telephone .................. 56.8 4.3 15.0 12.5 11.6 13.4 7.2

 Cordless Telephone ...................... 81.5 7.4 22.4 17.6 16.1 17.9 7.8

 Separate Facsimile Machine ........ 11.0 0.6 2.7 2.3 2.8 2.7 12.0

 Separate Photocopier ................... 7.4 0.9 2.2 1.7 1.4 1.3 14.8

 Telephone Answering Machine .... 65.7 6.2 19.3 14.9 12.5 12.7 7.0

1 One of five climatically distinct areas, determined according to the 30-year average (1961-1990) of the annual heating and cooling degree-days. For this

report, the heating or cooling degree-days are a measure of how cold or how hot a location is over a period of one year, relative to a base temperature of 65

degrees Fahrenheit. A household is assigned to a climate zone according to the 30-year average annual degree-days for an appropriate nearby weather station. 2 These numbers could include a combination of Desktop and Laptop personal computers.

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