Table HC6-2a. Usage Indicators by Year of Construction, 

 Million U.S. Households, 2001 

___________________________________________________________________________________________________________

 | | | 

 | | Year of Construction | 

 | |_____________________________________________________| 

 | | | | | | | | 

 | | 1990 | 1980 | 1970 | 1960 | 1950 | 1949 | 

 | | to | to | to | to | to | or | 

 Usage Indicators | Total | 20011 | 1989 | 1979 | 1969 | 1959 | Before | 

 |________|________|________|________|________|________|________| RSE 

 | | | | | | | | Row 

 RSE Column Factor: | 0.4 | 1.5 | 1.1 | 1.1 | 1.2 | 1.1 | 0.9 |Factors

____________________________________|________|________|________|________|________|________|________|_______

 | 

Total............................... 107.0 15.5 18.2 18.8 13.8 14.2 26.6 | 4.2 

 | 

Weekday Home Activities | 

 | 

 Home Used for Business | 

 Yes............................. 7.6 1.5 1.0 1.5 0.8 1.0 1.8 | 13.6 

 No.............................. 99.4 13.9 17.3 17.3 12.9 13.2 24.8 | 4.3 

 | 

 Energy-Intensive Activity | 

 Yes............................. 1.7 0.3 0.3 0.2 0.3 0.2 0.4 | 24.5 

 No.............................. 105.2 15.1 18.0 18.5 13.5 13.9 26.2 | 4.3 

 | 

 Someone Home All Day | 

 Yes............................. 53.0 7.6 8.4 9.1 7.1 7.5 13.2 | 5.6 

 No.............................. 53.9 7.8 9.7 9.6 6.6 6.7 13.4 | 5.1 

 | 

Heating | 

 | 

 Heat Home......................... 106.0 15.4 18.2 18.6 13.6 13.9 26.4 | 4.2 

 Do Not Heat Home.................. 1.0 Q Q Q 0.2 0.3 Q | 23.7 

 No Heating Equipment............ 0.5 Q Q Q 0.2 Q Q | 32.0 

 Have Equipment But | 

 Do Not Use It................... 0.4 Q Q Q Q Q Q | 43.6 

 | 

Adequacy of Insulation | 

 Well Insulated.................... 42.6 9.8 8.6 7.2 5.2 4.4 7.4 | 6.0 

 Adequately Insulated.............. 43.1 4.9 7.5 7.9 5.8 6.3 10.7 | 6.0 

 Poorly Insulated.................. 19.4 0.6 2.0 3.3 2.6 3.2 7.6 | 9.6 

 No Insulation..................... 0.9 Q Q Q Q Q 0.5 | 30.3 

 Don't Know........................ 0.9 Q Q Q Q Q 0.4 | 33.9 

 | 

Occurrences of Drafts During Winter | 

 All of the Time................... 5.9 0.4 0.7 1.1 0.7 0.6 2.4 | 17.0 

 Most of the Time.................. 6.4 0.3 0.7 1.3 0.8 1.0 2.4 | 16.1 

 Some of the Time.................. 34.6 4.1 5.4 5.3 4.3 5.3 10.2 | 6.9 

 Never............................. 55.3 10.2 10.4 10.2 7.3 6.7 10.5 | 5.5 

 Don't Know........................ 4.7 0.5 1.1 0.9 0.6 0.6 1.0 | 16.7 

 | 

 Thermostat | 

 Heat Home....................... 106.0 15.4 18.2 18.6 13.6 13.9 26.4 | 4.2 

 Thermostat Available During | 

 Heating Season................ 91.5 15.0 16.4 16.6 11.6 11.7 20.0 | 4.8 

 Programmable2 | 

 Yes....................... 25.1 5.2 4.3 3.8 3.2 3.5 5.1 | 9.3 

 No........................ 66.4 9.8 12.1 12.9 8.4 8.3 14.9 | 5.3 

 No Thermostat................. 14.5 0.4 1.8 1.9 2.0 2.1 6.3 | 11.5 

 Do Not Heat Home................ 1.0 Q Q Q 0.2 0.3 Q | 23.7 

 | 

Lower Winter Temperature Settings2 | 

 Daytime When No One is at Home | 

 Yes............................. 47.2 7.3 8.1 8.6 6.3 6.3 10.7 | 6.0 

 No.............................. 48.5 7.1 8.4 7.9 6.0 6.1 13.0 | 5.8 

 Unknown......................... 10.3 1.1 1.7 2.1 1.3 1.5 2.6 | 11.7 

 During Sleeping Hours | 

 Yes............................. 45.7 6.7 7.9 7.8 6.0 6.5 10.9 | 6.1 

 No.............................. 51.1 7.9 8.8 8.9 6.4 6.1 13.0 | 5.6 

 Unknown......................... 9.2 0.9 1.5 1.9 1.2 1.3 2.4 | 12.2 

___________________________________________________________________________________________________|_______

See footnotes at end of table. 

 

 

 

 

 

 

 

 

 
Table HC6-2a. Usage Indicators by Year of Construction, 

 Million U.S. Households, 2001 (Continued) 

___________________________________________________________________________________________________________

 | | | 

 | | Year of Construction | 

 | |_____________________________________________________| 

 | | | | | | | | 

 | | 1990 | 1980 | 1970 | 1960 | 1950 | 1949 | 

 | | to | to | to | to | to | or | 

 Usage Indicators | Total | 20011 | 1989 | 1979 | 1969 | 1959 | Before | 

 |________|________|________|________|________|________|________| RSE 

 | | | | | | | | Row 

 RSE Column Factor: | 0.4 | 1.5 | 1.1 | 1.1 | 1.2 | 1.1 | 0.9 |Factors

____________________________________|________|________|________|________|________|________|________|_______

 | 

Daytime Winter Temperature When | 

Someone is at Home2 | 

 Heat Turned On.................... 96.8 14.6 16.6 16.7 12.3 12.6 24.0 | 4.4 

 63 Degrees or Less.............. 3.9 0.4 0.5 0.7 0.6 0.6 1.1 | 16.6 

 64 to 66 Degrees ............... 8.4 1.0 1.3 1.1 1.1 1.2 2.7 | 13.3 

 67 to 69 Degrees................ 23.6 4.1 3.4 4.0 3.0 3.2 5.9 | 8.1 

 70 Degrees...................... 25.7 4.0 4.3 4.4 3.2 3.2 6.5 | 7.5 

 71 to 73 Degrees................ 16.5 2.7 3.1 2.8 2.2 2.1 3.6 | 9.3 

 74 Degrees or More.............. 18.6 2.4 4.0 3.7 2.1 2.3 4.1 | 9.0 

 Heat Turned Off................... 2.0 Q 0.3 0.7 0.2 0.3 0.3 | 24.5 

 Unknown/No Answer................. 7.2 0.6 1.3 1.2 1.0 1.0 2.1 | 14.5 

 | 

Daytime Winter Temperature When No | 

One is at Home2 | 

 Heat Turned On.................... 87.6 13.3 15.0 14.7 11.0 11.4 22.2 | 4.3 

 63 Degrees or Less.............. 17.7 2.2 2.9 3.0 2.2 2.4 5.0 | 9.9 

 64 to 66 Degrees ............... 17.2 3.0 2.2 2.8 2.3 2.4 4.4 | 9.7 

 67 to 69 Degrees................ 19.1 3.2 3.3 3.1 2.4 2.6 4.5 | 8.9 

 70 Degrees...................... 15.1 2.2 2.4 2.7 1.9 1.8 4.1 | 9.8 

 71 to 73 Degrees................ 8.7 1.4 1.7 1.2 1.2 1.2 2.1 | 11.5 

 74 Degrees or More.............. 9.8 1.4 2.6 1.7 0.9 1.1 2.1 | 12.8 

 Heat Turned Off................... 10.5 1.2 1.8 2.6 1.6 1.5 1.8 | 13.4 

 Unknown/No Answer................. 8.0 0.8 1.4 1.4 1.0 1.1 2.4 | 13.5 

 | 

Winter Temperature During Sleeping | 

Hours2 | 

 Heat Turned On.................... 91.8 13.8 15.9 15.6 11.6 12.0 23.0 | 4.5 

 63 Degrees or Less.............. 15.4 1.8 2.4 2.5 2.0 2.3 4.5 | 9.8 

 64 to 66 Degrees ............... 17.4 2.5 2.8 2.7 2.3 2.5 4.6 | 8.8 

 67 to 69 Degrees................ 21.0 3.7 3.4 3.4 3.0 2.8 4.7 | 7.8 

 70 Degrees...................... 17.4 2.8 2.6 3.1 1.8 2.3 4.8 | 8.9 

 71 to 73 Degrees................ 9.5 1.4 1.9 1.7 1.4 1.0 2.2 | 12.0 

 74 Degrees or More.............. 11.1 1.7 2.9 2.2 1.0 1.1 2.2 | 12.0 

 Heat Turned Off................... 7.1 1.0 1.0 1.8 1.1 1.0 1.3 | 15.5 

 Unknown/No Answer................. 7.1 0.6 1.3 1.2 0.9 1.0 2.1 | 14.5 

 | 

Air-Conditioning | 

 | 

Central Air-Conditioning | 

 Use a Central System.............. 58.6 12.8 13.9 11.3 7.2 6.9 6.4 | 5.8 

 All Summer...................... 28.4 6.3 7.5 5.8 3.3 2.8 2.7 | 8.3 

 Quite a Bit..................... 12.1 2.8 2.7 2.2 1.6 1.4 1.5 | 11.4 

 Only a Few Times................ 16.8 3.5 3.5 3.0 2.1 2.5 2.2 | 10.0 

 Not at All...................... 1.4 Q 0.2 0.4 Q Q Q | 26.5 

 No Central System................. 48.4 2.6 4.3 7.4 6.6 7.3 20.2 | 6.4 

 | 

Window/Wall Air-Conditioning | 

 Use Window/Wall Units............. 25.1 0.8 2.3 3.5 3.3 3.8 11.3 | 8.5 

 All Summer...................... 4.9 0.2 0.4 0.7 0.7 0.7 2.2 | 19.3 

 Quite a Bit..................... 5.2 Q 0.5 0.8 0.7 0.6 2.5 | 17.2 

 Only a Few Times................ 14.1 0.4 1.3 1.8 1.8 2.4 6.3 | 10.4 

 Not at All...................... 0.9 Q Q Q Q Q 0.4 | 37.3 

 No Window/Wall Units.............. 81.9 14.6 16.0 15.2 10.5 10.4 15.3 | 4.3 

___________________________________________________________________________________________________|_______

See footnotes at end of table. 

 

 

 

 

 

 

 

 

 

 

 

 

 
Table HC6-2a. Usage Indicators by Year of Construction, 

 Million U.S. Households, 2001 (Continued) 

___________________________________________________________________________________________________________

 | | | 

 | | Year of Construction | 

 | |_____________________________________________________| 

 | | | | | | | | 

 | | 1990 | 1980 | 1970 | 1960 | 1950 | 1949 | 

 | | to | to | to | to | to | or | 

 Usage Indicators | Total | 20011 | 1989 | 1979 | 1969 | 1959 | Before | 

 |________|________|________|________|________|________|________| RSE 

 | | | | | | | | Row 

 RSE Column Factor: | 0.4 | 1.5 | 1.1 | 1.1 | 1.2 | 1.1 | 0.9 |Factors

____________________________________|________|________|________|________|________|________|________|_______

 | 

Hot Water | 

 | 

Dishwasher Use Each Week | 

 Use a Dishwasher.................. 56.7 12.3 12.8 10.4 7.0 6.2 8.1 | 5.7 

 Less Than Once a Week........... 9.4 1.5 2.1 2.0 1.5 1.0 1.4 | 12.3 

 Once Each Week.................. 7.5 1.3 1.5 1.5 1.1 0.9 1.2 | 14.2 

 2 to 3 Times.................... 17.8 3.6 4.3 3.2 2.1 2.5 2.1 | 9.8 

 4 to 6 Times.................... 11.7 3.2 2.7 1.7 1.5 0.9 1.7 | 11.5 

 At Least Once Each Day.......... 10.4 2.8 2.2 2.0 0.9 0.9 1.7 | 11.5 

 No Dishwasher..................... 50.3 3.2 5.5 8.4 6.8 8.0 18.5 | 5.9 

 | 

Loads of Laundry Washed Each Week | 

 Use a Clothes Washer.............. 84.1 13.8 14.8 13.9 10.1 11.8 19.7 | 4.5 

 1 Load or Less.................. 6.8 0.4 1.1 1.2 1.0 1.0 2.1 | 13.3 

 2 to 9 Loads.................... 65.1 11.1 11.3 10.7 7.9 9.5 14.7 | 4.9 

 10 to 15 Loads.................. 9.6 2.0 1.9 1.6 0.9 1.1 2.1 | 11.0 

 More than 15 Loads.............. 2.7 0.4 0.5 0.5 0.3 0.2 0.8 | 22.1 

 No Washing Machine................ 22.9 1.6 3.5 4.9 3.7 2.3 6.9 | 9.5 

 | 

Water Temperature Setting for | 

Clothes Washer | 

 Wash Cycle | 

 Hot............................. 6.2 0.9 0.9 1.1 0.8 0.9 1.6 | 13.9 

 Warm............................ 49.7 8.0 8.6 8.0 5.8 7.3 12.0 | 5.9 

 Cold............................ 28.2 5.0 5.3 4.7 3.5 3.6 6.1 | 7.2 

 Rinse Cycle | 

 Hot............................. 1.4 0.3 Q 0.3 Q Q 0.3 | 30.4 

 Warm............................ 16.6 2.7 2.7 2.8 1.9 2.8 3.9 | 10.0 

 Cold............................ 66.1 10.9 12.0 10.8 8.0 8.8 15.5 | 5.1 

 No Washing Machine................ 22.9 1.6 3.5 4.9 3.7 2.3 6.9 | 9.5 

 | 

Clothes Dryer | 

 Use a Clothes Dryer............... 78.8 13.6 14.2 13.0 9.5 10.7 17.9 | 4.7 

 Every Time Clothes are Washed... 63.5 11.4 12.0 10.6 6.9 8.6 13.9 | 5.1 

 Some, but not All, Loads........ 12.7 1.9 1.9 2.0 2.0 1.7 3.2 | 9.8 

 Used Infrequently............... 2.7 0.2 0.2 0.4 0.5 0.4 0.8 | 21.1 

 No Clothes Dryer.................. 28.2 1.8 4.1 5.8 4.3 3.5 8.7 | 8.2 

 | 

Cooking | 

 | 

Number of Hot Meals Cooked in the | 

Home | 

 3 or More Times a Day............. 7.5 1.3 1.0 1.3 1.0 1.0 1.9 | 13.4 

 2 Times a Day..................... 26.8 4.4 4.1 4.5 3.4 3.7 6.7 | 7.1 

 Once a Day........................ 43.3 6.6 7.5 7.4 6.0 5.4 10.4 | 5.8 

 A Few Times Each Week............. 21.7 2.4 4.3 4.2 2.5 3.1 5.2 | 8.4 

 About Once a Week................. 4.0 0.5 0.6 0.9 0.4 0.6 1.2 | 18.3 

 Less Than Once a Week............. 2.4 Q 0.4 0.4 0.3 0.4 0.8 | 23.1 

 No Hot Meals Cooked............... 1.2 Q 0.4 Q Q Q 0.4 | 39.0 

 | 

Conventional Oven | 

 Use a Conventional Oven........... 99.4 13.7 16.8 17.4 12.7 13.4 25.3 | 4.3 

 More Than Once a Day............ 8.6 1.5 1.3 1.5 1.1 1.1 2.1 | 13.6 

 Once a Day...................... 17.4 2.7 3.2 2.9 2.4 2.2 4.0 | 8.5 

 Between Once a Day and | 

 Once a Week..................... 33.1 5.1 5.4 6.0 3.9 4.8 7.9 | 7.0 

 Once a Week..................... 15.6 2.2 2.5 3.0 2.3 1.7 3.9 | 9.6 

 Less Than Once a Week........... 24.6 2.2 4.4 4.0 3.1 3.6 7.3 | 8.4 

 Do Not Use........................ 7.6 1.8 1.4 1.3 1.1 0.8 1.3 | 15.4 

___________________________________________________________________________________________________|_______

See footnotes at end of table. 

 

 

 

 

 

 

 
Table HC6-2a. Usage Indicators by Year of Construction, 

 Million U.S. Households, 2001 (Continued) 

___________________________________________________________________________________________________________

 | | | 

 | | Year of Construction | 

 | |_____________________________________________________| 

 | | | | | | | | 

 | | 1990 | 1980 | 1970 | 1960 | 1950 | 1949 | 

 | | to | to | to | to | to | or | 

 Usage Indicators | Total | 20011 | 1989 | 1979 | 1969 | 1959 | Before | 

 |________|________|________|________|________|________|________| RSE 

 | | | | | | | | Row 

 RSE Column Factor: | 0.4 | 1.5 | 1.1 | 1.1 | 1.2 | 1.1 | 0.9 |Factors

____________________________________|________|________|________|________|________|________|________|_______

 | 

Microwave Oven | 

 Use a Microwave Oven.............. 92.1 14.4 15.9 16.5 11.7 12.2 21.4 | 4.2 

 Most or All..................... 8.2 1.0 1.5 1.5 1.3 1.2 1.8 | 13.2 

 About Half...................... 19.3 3.1 3.6 3.1 2.7 2.4 4.4 | 8.8 

 Some or Very Little............. 22.4 4.0 4.0 4.0 2.6 2.8 5.1 | 8.2 

 For Defrosting, Reheating, | 

 or Snacks....................... 42.2 6.3 6.9 7.9 5.3 5.7 10.1 | 6.1 

 No Microwave Oven................. 14.8 1.0 2.3 2.3 2.0 2.0 5.2 | 11.0 

 | 

Electric Coffee Maker | 

 Use an Electric Coffee Maker...... 65.5 10.6 11.2 11.0 8.4 8.8 15.5 | 4.9 

 Three or More Times a Day....... 2.4 0.5 0.2 0.3 0.3 0.4 0.7 | 22.8 

 Two Times a Day................. 5.9 0.8 0.8 1.0 0.8 0.8 1.8 | 14.0 

 Once a Day...................... 33.6 5.9 5.8 5.5 4.5 4.4 7.5 | 6.4 

 A Few Times Each Week........... 9.4 1.5 1.7 1.7 1.1 1.3 2.1 | 11.3 

 About Once a Week............... 5.2 0.8 1.0 0.9 0.6 0.7 1.1 | 16.9 

 Less than Once a Week........... 9.0 1.1 1.6 1.6 1.2 1.2 2.3 | 11.8 

 No Electric Coffee Maker.......... 41.5 4.9 7.1 7.8 5.3 5.3 11.1 | 6.0 

 | 

Time Electric Coffee Maker is Left | 

On | 

 Turned Off Right Away............. 18.8 2.3 3.4 2.9 2.7 2.5 5.0 | 8.5 

 Less than 15 Minutes.............. 10.0 1.5 2.0 1.6 1.2 1.5 2.2 | 10.7 

 15 Minutes to 1 Hour.............. 24.6 4.8 3.8 4.2 3.0 3.4 5.3 | 8.1 

 More than 1 Hour.................. 12.1 1.9 2.0 2.2 1.6 1.4 3.0 | 10.8 

 | 

Electric Toaster | 

 Use a Electric Toaster............ 36.1 5.3 7.0 6.1 4.9 4.4 8.4 | 6.9 

 Three or More Times a Day....... 1.0 Q Q Q Q Q 0.4 | 34.0 

 Two Times a Day................. 2.7 0.5 0.5 0.4 0.3 0.4 0.6 | 22.5 

 Once a Day...................... 8.2 1.0 1.7 1.3 1.3 1.0 2.0 | 13.4 

 A Few Times Each Week........... 11.9 1.9 2.2 2.2 1.6 1.5 2.6 | 10.9 

 About Once a Week............... 4.3 0.7 0.7 0.8 0.7 0.5 0.9 | 16.3 

 Less than Once a Week........... 7.9 1.2 1.7 1.2 1.1 0.9 1.9 | 12.3 

 No Electric Toaster............... 70.9 10.1 11.3 12.7 8.8 9.8 18.2 | 4.6 

 | 

Lights | 

Indoor Lights Turned On: | 

 1 to 4 Hours per Day | 

 None............................ 10.2 1.1 1.6 1.9 1.2 1.4 3.1 | 12.6 

 1............................... 30.1 3.6 4.9 4.9 4.3 4.0 8.4 | 7.3 

 2............................... 30.7 4.4 5.5 5.6 3.6 3.9 7.7 | 7.7 

 3............................... 16.6 2.8 2.9 3.1 2.2 2.4 3.1 | 9.2 

 4............................... 10.5 1.5 1.7 1.9 1.3 1.5 2.5 | 12.0 

 5 or More....................... 8.8 2.1 1.7 1.2 1.1 1.0 1.8 | 13.9 

 | 

 Between 4 and 12 Hours per Day | 

 None............................ 30.2 4.1 4.7 5.1 3.7 4.0 8.6 | 7.7 

 1............................... 25.2 2.9 4.4 4.5 3.6 3.5 6.2 | 7.7 

 2............................... 25.5 3.7 4.2 5.1 3.4 3.3 5.7 | 7.7 

 3............................... 12.7 1.7 2.5 2.3 1.5 1.9 2.8 | 10.7 

 4............................... 7.2 1.2 1.3 1.1 0.8 0.8 1.9 | 13.6 

 5 or More....................... 6.2 1.8 1.1 0.6 0.8 0.6 1.4 | 15.9 

 | 

 More then 12 Hours per Day | 

 None............................ 81.1 11.9 14.0 13.9 10.3 10.8 20.2 | 4.5 

 1............................... 14.4 2.0 2.0 3.0 1.9 2.0 3.6 | 10.4 

 2............................... 6.8 0.8 1.2 1.0 1.1 0.9 1.8 | 15.1 

 3............................... 2.4 0.4 0.5 0.5 Q 0.3 0.5 | 26.1 

 4............................... 1.3 Q 0.2 Q Q Q 0.4 | 31.7 

 5 or More....................... 1.1 Q 0.3 Q Q Q Q | 29.3 

___________________________________________________________________________________________________|_______

See footnotes at end of table. 

 

 

 

 

 
 

 

Table HC6-2a. Usage Indicators by Year of Construction, 

 Million U.S. Households, 2001 (Continued) 

___________________________________________________________________________________________________________

 | | | 

 | | Year of Construction | 

 | |_____________________________________________________| 

 | | | | | | | | 

 | | 1990 | 1980 | 1970 | 1960 | 1950 | 1949 | 

 | | to | to | to | to | to | or | 

 Usage Indicators | Total | 20011 | 1989 | 1979 | 1969 | 1959 | Before | 

 |________|________|________|________|________|________|________| RSE 

 | | | | | | | | Row 

 RSE Column Factor: | 0.4 | 1.5 | 1.1 | 1.1 | 1.2 | 1.1 | 0.9 |Factors

____________________________________|________|________|________|________|________|________|________|_______

 | 

Outdoor Lights on All Night | 

 Used.............................. 24.5 3.4 4.7 4.7 3.2 3.6 4.9 | 8.4 

 Not Used ......................... 82.5 12.1 13.5 14.1 10.6 10.5 21.7 | 4.5 

 | 

Gas Fireplace | 

Use a Gas Fireplace During Winter | 

Months.............................. 3.7 1.4 0.7 0.6 0.3 0.3 0.5 | 19.5 

 Most Days......................... 1.3 0.4 0.2 0.2 Q Q 0.3 | 30.8 

 Almost Once a Week................ 1.1 0.6 Q Q Q Q Q | 29.0 

 Less Than 4 Times a Month......... 1.2 0.4 0.3 Q Q Q Q | 27.3 

 | 

Use a Personal Computer............. 60.0 11.0 11.6 10.3 7.2 7.8 12.0 | 5.3 

 | 

Hours PC Turned On Each Week | 

 Less Than 2 Hours................. 10.3 1.8 1.8 2.1 1.2 1.5 1.9 | 12.0 

 2 to 15 Hours..................... 26.3 4.6 5.1 4.4 3.3 3.4 5.5 | 7.5 

 16 to 40 Hours.................... 12.2 2.7 2.7 1.6 1.5 1.5 2.3 | 11.0 

 More than 40 Hours................ 5.7 0.8 1.1 1.2 0.7 0.8 1.1 | 15.4 

 On All The Time................... 5.6 1.1 0.9 1.0 0.6 0.6 1.3 | 16.3 

 | 

Use of PCs Turned on 16 Hours | 

a Week or More | 

 Personal Use Only................. 14.0 2.5 2.7 2.4 1.7 2.0 2.7 | 9.7 

 Business Use Only................. 2.1 0.5 0.4 0.3 0.3 0.2 0.4 | 23.6 

 Both Personal and Business........ 7.3 1.6 1.7 1.1 0.7 0.7 1.5 | 14.0 

 | 

Business Use of PCs Turned on 16 | 

Hours a Week or More | 

 Use to Telecommute................ 3.6 0.9 0.8 0.5 0.4 0.2 0.7 | 22.1 

 Other Business Use................ 5.8 1.2 1.3 0.9 0.6 0.7 1.2 | 15.0 

 | 

Battery Operated Appliances/Tools | 

 Use Battery Operated Appliances/ | 

 Tools............................. 47.7 8.1 8.3 8.2 6.1 6.5 10.5 | 6.0 

 | 

 How Maintained When | 

 Not in Use | 

 Plugged in All The Time......... 10.8 1.8 2.2 1.8 1.4 1.7 1.9 | 12.3 

 Recharged As Needed............. 33.8 5.7 5.7 5.8 4.4 4.4 7.8 | 6.8 

 Both Ways are Used.............. 3.1 0.7 0.3 0.6 0.2 0.4 0.8 | 20.7 

 Don't Use Any..................... 59.3 7.3 10.0 10.6 7.7 7.6 16.1 | 5.3 

___________________________________________________________________________________________________|_______

 1 New construction for 2001 includes only those housing units built and occupied between January and the 

April-August period when the household interviews were conducted. 

 2 The 1.0 million households that do not heat their homes are not included in these categories. 

 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. • All temperatures listed are in degrees Fahrenheit. 

 Source: Energy Information Administration, Office of Energy Markets and End Use, Forms EIA-457 A, B, C 

of the 2001 Residential Energy Consumption Survey.