Table HC6-4a. Usage Indicators by Type of Housing Unit, 

 Million U.S. Households, 2001 

______________________________________________________________________________________________________________

 | | | 

 | | Type of Housing Unit | 

 | |_______________________________________________________| 

 | | | | | 

 | | | Apartments in Buildings | | 

 | | | With | | 

 | | |___________________________| | 

 | | | | | | 

 | | | Two to Four | Five or More| | 

 Usage Indicators | Total |Single-Family| Units | Units | Mobile Home | 

 |_________|_____________|_____________|_____________|_____________| RSE 

 | | | | | | Row 

 RSE Column Factor: | 0.4 | 0.5 | 1.6 | 1.4 | 2.0 |Factors

____________________________________|_________|_____________|_____________|_____________|_____________|_______

 | 

Total............................... 107.0 73.7 9.5 17.0 6.8 | 4.3 

 | 

Weekday Home Activities | 

 | 

 Home Used for Business | 

 Yes............................. 7.6 6.2 0.4 0.5 0.5 | 14.6 

 No.............................. 99.4 67.5 9.1 16.5 6.4 | 4.5 

 | 

 Energy-Intensive Activity | 

 Yes............................. 1.7 1.4 Q Q Q | 29.9 

 No.............................. 105.2 72.2 9.4 16.9 6.8 | 4.3 

 | 

 Someone Home All Day | 

 Yes............................. 53.0 38.3 4.2 7.3 3.2 | 5.3 

 No.............................. 53.9 35.4 5.3 9.7 3.6 | 5.2 

 | 

Heating | 

 | 

 Heat Home......................... 106.0 73.4 9.4 16.4 6.8 | 4.3 

 Do Not Heat Home.................. 1.0 0.3 Q 0.6 Q | 20.3 

 No Heating Equipment............ 0.5 0.2 Q 0.3 Q | 25.9 

 Have Equipment But | 

 Do Not Use It................... 0.4 Q Q 0.3 Q | 30.7 

 | 

Adequacy of Insulation | 

 Well Insulated.................... 42.6 30.4 3.0 6.8 2.5 | 6.7 

 Adequately Insulated.............. 43.1 30.1 3.3 7.1 2.6 | 6.0 

 Poorly Insulated.................. 19.4 12.2 2.9 2.7 1.7 | 8.1 

 No Insulation..................... 0.9 0.6 Q Q Q | 34.7 

 Don't Know........................ 0.9 0.4 Q 0.4 Q | 35.3 

 | 

Occurrences of Drafts During Winter | 

 All of the Time................... 5.9 3.6 1.0 0.9 0.3 | 14.3 

 Most of the Time.................. 6.4 3.9 1.2 1.0 0.4 | 12.6 

 Some of the Time.................. 34.6 23.6 3.2 5.4 2.5 | 6.8 

 Never............................. 55.3 40.5 3.5 8.0 3.4 | 5.7 

 Don't Know........................ 4.7 2.1 0.6 1.7 0.2 | 15.4 

 | 

 Thermostat | 

 Heat Home....................... 106.0 73.4 9.4 16.4 6.8 | 4.3 

 Thermostat Available During | 

 Heating Season................ 91.5 66.4 7.5 11.6 6.1 | 5.1 

 Programmable1 | 

 Yes....................... 25.1 20.9 1.3 1.9 1.0 | 11.8 

 No........................ 66.4 45.5 6.2 9.6 5.1 | 5.6 

 No Thermostat................. 14.5 7.0 1.9 4.9 0.7 | 9.5 

 Do Not Heat Home................ 1.0 0.3 Q 0.6 Q | 20.3 

 | 

Lower Winter Temperature Settings1 | 

 Daytime When No One is at Home | 

 Yes............................. 47.2 34.9 3.7 5.5 3.1 | 6.2 

 No.............................. 48.5 33.8 4.4 7.1 3.2 | 5.8 

 Unknown......................... 10.3 4.7 1.3 3.8 0.5 | 11.2 

 During Sleeping Hours | 

 Yes............................. 45.7 34.5 2.9 5.4 2.8 | 6.4 

 No.............................. 51.1 35.0 5.3 7.3 3.5 | 5.7 

 Unknown......................... 9.2 3.9 1.2 3.7 0.4 | 11.7 

______________________________________________________________________________________________________|_______

See footnotes at end of table. 
Table HC6-4a. Usage Indicators by Type of Housing Unit, 

 Million U.S. Households, 2001 (Continued) 

______________________________________________________________________________________________________________

 | | | 

 | | Type of Housing Unit | 

 | |_______________________________________________________| 

 | | | | | 

 | | | Apartments in Buildings | | 

 | | | With | | 

 | | |___________________________| | 

 | | | | | | 

 | | | Two to Four | Five or More| | 

 Usage Indicators | Total |Single-Family| Units | Units | Mobile Home | 

 |_________|_____________|_____________|_____________|_____________| RSE 

 | | | | | | Row 

 RSE Column Factor: | 0.4 | 0.5 | 1.6 | 1.4 | 2.0 |Factors

____________________________________|_________|_____________|_____________|_____________|_____________|_______

 | 

Daytime Winter Temperature When | 

Someone is at Home1 | 

 Heat Turned On.................... 96.8 69.4 8.2 12.8 6.3 | 4.5 

 63 Degrees or Less.............. 3.9 2.5 0.6 0.6 0.3 | 15.2 

 64 to 66 Degrees ............... 8.4 5.7 0.9 1.2 0.6 | 12.0 

 67 to 69 Degrees................ 23.6 18.6 1.5 2.0 1.5 | 8.0 

 70 Degrees...................... 25.7 18.3 2.3 3.4 1.6 | 7.3 

 71 to 73 Degrees................ 16.5 12.2 1.0 2.1 1.2 | 9.7 

 74 Degrees or More.............. 18.6 12.3 1.8 3.4 1.2 | 9.1 

 Heat Turned Off................... 2.0 0.9 0.2 0.7 Q | 24.0 

 Unknown/No Answer................. 7.2 3.0 1.0 2.9 0.3 | 13.6 

 | 

Daytime Winter Temperature When No | 

One is at Home1 | 

 Heat Turned On.................... 87.6 64.2 7.3 10.3 5.7 | 4.2 

 63 Degrees or Less.............. 17.7 13.1 1.6 1.6 1.3 | 9.7 

 64 to 66 Degrees ............... 17.2 13.1 1.4 1.7 1.0 | 9.2 

 67 to 69 Degrees................ 19.1 14.8 1.4 1.7 1.2 | 10.1 

 70 Degrees...................... 15.1 10.3 1.5 2.2 1.1 | 8.8 

 71 to 73 Degrees................ 8.7 6.5 0.5 1.2 0.5 | 12.4 

 74 Degrees or More.............. 9.8 6.4 0.9 1.9 0.6 | 13.0 

 Heat Turned Off................... 10.5 5.7 1.0 3.1 0.6 | 12.9 

 Unknown/No Answer................. 8.0 3.5 1.1 3.0 0.4 | 12.5 

 | 

Winter Temperature During Sleeping | 

Hours1 | 

 Heat Turned On.................... 91.8 66.6 7.8 11.1 6.2 | 4.5 

 63 Degrees or Less.............. 15.4 11.9 1.2 1.3 1.1 | 11.1 

 64 to 66 Degrees ............... 17.4 13.1 1.4 1.7 1.2 | 8.2 

 67 to 69 Degrees................ 21.0 15.8 1.7 2.1 1.4 | 8.7 

 70 Degrees...................... 17.4 12.1 1.9 2.2 1.2 | 8.5 

 71 to 73 Degrees................ 9.5 6.9 0.9 1.2 0.5 | 12.6 

 74 Degrees or More.............. 11.1 6.9 0.9 2.5 0.8 | 12.1 

 Heat Turned Off................... 7.1 3.8 0.6 2.4 0.3 | 14.8 

 Unknown/No Answer................. 7.1 2.9 1.0 2.9 0.3 | 13.4 

 | 

Air-Conditioning | 

 | 

Central Air-Conditioning | 

 Use a Central System.............. 58.6 44.4 3.2 7.4 3.7 | 6.6 

 All Summer...................... 28.4 21.8 1.7 3.2 1.7 | 9.6 

 Quite a Bit..................... 12.1 9.0 0.6 1.7 0.8 | 12.0 

 Only a Few Times................ 16.8 12.8 0.9 2.1 0.9 | 11.3 

 Not at All...................... 1.4 0.8 Q 0.3 Q | 33.3 

 No Central System................. 48.4 29.3 6.3 9.6 3.1 | 5.9 

 | 

Window/Wall Air-Conditioning | 

 Use Window/Wall Units............. 25.1 14.8 3.3 5.2 1.8 | 7.4 

 All Summer...................... 4.9 2.9 0.6 0.8 0.6 | 15.0 

 Quite a Bit..................... 5.2 3.3 0.6 0.9 0.3 | 16.3 

 Only a Few Times................ 14.1 8.2 1.9 3.1 0.8 | 9.2 

 Not at All...................... 0.9 0.4 Q 0.4 Q | 32.4 

 No Window/Wall Units.............. 81.9 58.9 6.2 11.8 5.0 | 4.4 

______________________________________________________________________________________________________|_______

See footnotes at end of table. 
Table HC6-4a. Usage Indicators by Type of Housing Unit, 

 Million U.S. Households, 2001 (Continued) 

______________________________________________________________________________________________________________

 | | | 

 | | Type of Housing Unit | 

 | |_______________________________________________________| 

 | | | | | 

 | | | Apartments in Buildings | | 

 | | | With | | 

 | | |___________________________| | 

 | | | | | | 

 | | | Two to Four | Five or More| | 

 Usage Indicators | Total |Single-Family| Units | Units | Mobile Home | 

 |_________|_____________|_____________|_____________|_____________| RSE 

 | | | | | | Row 

 RSE Column Factor: | 0.4 | 0.5 | 1.6 | 1.4 | 2.0 |Factors

____________________________________|_________|_____________|_____________|_____________|_____________|_______

 | 

Hot Water | 

 | 

Dishwasher Use Each Week | 

 Use a Dishwasher.................. 56.7 44.5 2.6 7.1 2.5 | 6.6 

 Less Than Once a Week........... 9.4 6.4 0.6 2.0 0.5 | 12.0 

 Once Each Week.................. 7.5 5.6 0.3 1.2 0.4 | 15.7 

 2 to 3 Times.................... 17.8 14.2 0.8 2.2 0.6 | 11.2 

 4 to 6 Times.................... 11.7 10.2 0.4 0.6 0.4 | 14.3 

 At Least Once Each Day.......... 10.4 8.1 0.5 1.1 0.7 | 14.1 

 No Dishwasher..................... 50.3 29.2 6.9 9.9 4.3 | 5.4 

 | 

Loads of Laundry Washed Each Week | 

 Use a Clothes Washer.............. 84.1 70.0 4.5 3.9 5.8 | 5.3 

 1 Load or Less.................. 6.8 5.3 0.4 0.5 0.7 | 14.7 

 2 to 9 Loads.................... 65.1 54.0 3.6 3.2 4.3 | 5.9 

 10 to 15 Loads.................. 9.6 8.2 0.5 0.3 0.6 | 13.1 

 More than 15 Loads.............. 2.7 2.4 Q Q Q | 23.1 

 No Washing Machine................ 22.9 3.7 5.0 13.1 1.1 | 8.6 

 | 

Water Temperature Setting for | 

Clothes Washer | 

 Wash Cycle | 

 Hot............................. 6.2 5.0 0.3 0.5 0.5 | 16.2 

 Warm............................ 49.7 41.8 2.9 2.2 2.7 | 6.5 

 Cold............................ 28.2 23.1 1.3 1.2 2.6 | 8.7 

 Rinse Cycle | 

 Hot............................. 1.4 1.1 Q Q Q | 37.8 

 Warm............................ 16.6 13.8 1.2 1.0 0.7 | 11.8 

 Cold............................ 66.1 55.1 3.3 2.9 4.9 | 6.2 

 No Washing Machine................ 22.9 3.7 5.0 13.1 1.1 | 8.6 

 | 

Clothes Dryer | 

 Use a Clothes Dryer............... 78.8 66.4 4.1 3.1 5.2 | 5.6 

 Every Time Clothes are Washed... 63.5 52.9 3.5 2.8 4.3 | 6.1 

 Some, but not All, Loads........ 12.7 11.2 0.5 0.3 0.7 | 13.4 

 Used Infrequently............... 2.7 2.3 Q Q 0.2 | 21.4 

 No Clothes Dryer.................. 28.2 7.3 5.4 13.9 1.6 | 7.2 

 | 

Cooking | 

 | 

Number of Hot Meals Cooked in the | 

Home | 

 3 or More Times a Day............. 7.5 5.1 0.6 1.2 0.7 | 13.2 

 2 Times a Day..................... 26.8 18.9 2.5 3.3 2.1 | 7.2 

 Once a Day........................ 43.3 30.7 3.6 6.5 2.5 | 6.0 

 A Few Times Each Week............. 21.7 14.4 2.0 4.2 1.1 | 8.2 

 About Once a Week................. 4.0 2.6 0.3 0.9 0.3 | 16.2 

 Less Than Once a Week............. 2.4 1.4 0.4 0.5 Q | 20.2 

 No Hot Meals Cooked............... 1.2 0.7 Q 0.4 Q | 41.3 

 | 

Conventional Oven | 

 Use a Conventional Oven........... 99.4 67.5 9.1 16.3 6.4 | 4.5 

 More Than Once a Day............ 8.6 5.9 1.0 1.4 0.4 | 12.6 

 Once a Day...................... 17.4 11.9 1.8 2.5 1.2 | 9.0 

 Between Once a Day and | 

 Once a Week..................... 33.1 24.5 2.4 4.4 1.8 | 7.1 

 Once a Week..................... 15.6 10.5 1.6 2.4 1.1 | 9.0 

 Less Than Once a Week........... 24.6 14.7 2.3 5.6 1.9 | 7.8 

 Do Not Use........................ 7.6 6.2 0.4 0.7 0.4 | 16.9 

______________________________________________________________________________________________________|_______

See footnotes at end of table. 
Table HC6-4a. Usage Indicators by Type of Housing Unit, 

 Million U.S. Households, 2001 (Continued) 

______________________________________________________________________________________________________________

 | | | 

 | | Type of Housing Unit | 

 | |_______________________________________________________| 

 | | | | | 

 | | | Apartments in Buildings | | 

 | | | With | | 

 | | |___________________________| | 

 | | | | | | 

 | | | Two to Four | Five or More| | 

 Usage Indicators | Total |Single-Family| Units | Units | Mobile Home | 

 |_________|_____________|_____________|_____________|_____________| RSE 

 | | | | | | Row 

 RSE Column Factor: | 0.4 | 0.5 | 1.6 | 1.4 | 2.0 |Factors

____________________________________|_________|_____________|_____________|_____________|_____________|_______

 | 

Microwave Oven | 

 Use a Microwave Oven.............. 92.1 65.9 7.6 12.5 6.2 | 4.2 

 Most or All..................... 8.2 5.2 0.8 1.7 0.5 | 11.8 

 About Half...................... 19.3 13.9 1.7 2.6 1.1 | 9.5 

 Some or Very Little............. 22.4 16.3 1.8 2.8 1.5 | 8.3 

 For Defrosting, Reheating, | 

 or Snacks....................... 42.2 30.4 3.4 5.4 3.1 | 6.8 

 No Microwave Oven................. 14.8 7.8 1.9 4.5 0.7 | 10.6 

 | 

Electric Coffee Maker | 

 Use an Electric Coffee Maker...... 65.5 49.8 4.3 7.3 4.1 | 5.2 

 Three or More Times a Day....... 2.4 1.8 Q 0.3 Q | 22.9 

 Two Times a Day................. 5.9 4.8 0.4 0.3 0.4 | 16.5 

 Once a Day...................... 33.6 25.9 2.0 3.4 2.3 | 6.9 

 A Few Times Each Week........... 9.4 7.2 0.6 1.2 0.5 | 11.9 

 About Once a Week............... 5.2 3.7 0.6 0.7 0.3 | 15.3 

 Less than Once a Week........... 9.0 6.6 0.6 1.3 0.5 | 12.2 

 No Electric Coffee Maker.......... 41.5 23.9 5.1 9.7 2.7 | 5.7 

 | 

Time Electric Coffee Maker is Left | 

On | 

 Turned Off Right Away............. 18.8 13.7 1.5 2.5 1.1 | 9.4 

 Less than 15 Minutes.............. 10.0 6.8 0.8 1.7 0.8 | 11.1 

 15 Minutes to 1 Hour.............. 24.6 19.6 1.4 2.2 1.4 | 8.7 

 More than 1 Hour.................. 12.1 9.7 0.6 1.0 0.9 | 11.3 

 | 

Electric Toaster | 

 Use a Electric Toaster............ 36.1 25.9 2.7 5.5 1.9 | 7.3 

 Three or More Times a Day....... 1.0 0.7 Q Q Q | 40.2 

 Two Times a Day................. 2.7 2.1 Q 0.4 Q | 21.6 

 Once a Day...................... 8.2 6.2 0.6 1.0 0.3 | 14.4 

 A Few Times Each Week........... 11.9 8.8 0.9 1.6 0.6 | 11.3 

 About Once a Week............... 4.3 2.8 0.3 0.9 0.2 | 15.1 

 Less than Once a Week........... 7.9 5.3 0.5 1.4 0.7 | 11.7 

 No Electric Toaster............... 70.9 47.8 6.8 11.5 4.9 | 4.5 

 | 

Lights | 

Indoor Lights Turned On: | 

 1 to 4 Hours per Day | 

 None............................ 10.2 6.3 1.3 1.7 1.0 | 12.4 

 1............................... 30.1 17.7 3.7 6.5 2.3 | 6.3 

 2............................... 30.7 20.9 2.4 5.5 2.0 | 7.3 

 3............................... 16.6 12.6 1.1 2.1 0.8 | 9.9 

 4............................... 10.5 8.7 0.8 0.8 0.3 | 14.2 

 5 or More....................... 8.8 7.7 0.4 0.5 0.4 | 15.7 

 | 

 Between 4 and 12 Hours per Day | 

 None............................ 30.2 19.3 3.1 5.4 2.4 | 7.6 

 1............................... 25.2 15.0 3.0 5.5 1.6 | 7.5 

 2............................... 25.5 18.2 1.8 4.1 1.3 | 8.0 

 3............................... 12.7 9.7 0.9 1.2 0.9 | 12.0 

 4............................... 7.2 6.1 0.4 0.4 0.3 | 14.5 

 5 or More....................... 6.2 5.3 0.3 0.3 0.3 | 19.8 

 | 

 More then 12 Hours per Day | 

 None............................ 81.1 55.7 6.7 13.7 5.0 | 4.5 

 1............................... 14.4 9.7 1.5 2.3 0.9 | 9.8 

 2............................... 6.8 4.9 0.5 0.8 0.5 | 15.6 

 3............................... 2.4 1.6 0.4 Q 0.3 | 28.3 

 4............................... 1.3 1.0 Q Q Q | 33.7 

 5 or More....................... 1.1 0.8 Q Q Q | 30.4 

______________________________________________________________________________________________________|_______

See footnotes at end of table. 
Table HC6-4a. Usage Indicators by Type of Housing Unit, 

 Million U.S. Households, 2001 (Continued) 

______________________________________________________________________________________________________________

 | | | 

 | | Type of Housing Unit | 

 | |_______________________________________________________| 

 | | | | | 

 | | | Apartments in Buildings | | 

 | | | With | | 

 | | |___________________________| | 

 | | | | | | 

 | | | Two to Four | Five or More| | 

 Usage Indicators | Total |Single-Family| Units | Units | Mobile Home | 

 |_________|_____________|_____________|_____________|_____________| RSE 

 | | | | | | Row 

 RSE Column Factor: | 0.4 | 0.5 | 1.6 | 1.4 | 2.0 |Factors

____________________________________|_________|_____________|_____________|_____________|_____________|_______

 | 

Outdoor Lights on All Night | 

 Used.............................. 24.5 20.2 1.4 1.2 1.6 | 9.6 

 Not Used ......................... 82.5 53.5 8.1 15.8 5.2 | 4.3 

 | 

Gas Fireplace | 

Use a Gas Fireplace During Winter | 

Months.............................. 3.7 3.1 Q Q Q | 19.6 

 Most Days......................... 1.3 1.2 Q Q Q | 39.0 

 Almost Once a Week................ 1.1 0.9 Q Q Q | 35.3 

 Less Than 4 Times a Month....... 1.2 1.1 Q Q Q | 33.0 

 | 

Use a Personal Computer............. 60.0 46.4 4.1 6.8 2.7 | 5.9 

 | 

Hours PC Turned On Each Week | 

 Less Than 2 Hours................. 10.3 7.4 1.0 1.2 0.7 | 12.3 

 2 to 15 Hours..................... 26.3 20.8 1.5 2.9 1.1 | 8.1 

 16 to 40 Hours.................... 12.2 9.6 0.8 1.3 0.5 | 11.6 

 More than 40 Hours................ 5.7 4.6 0.3 0.6 Q | 17.5 

 On All The Time................... 5.6 4.0 0.5 0.7 0.4 | 16.0 

 | 

Use of PCs Turned on 16 Hours | 

a Week or More | 

 Personal Use Only................. 14.0 10.6 1.0 1.7 0.7 | 10.8 

 Business Use Only................. 2.1 1.8 Q 0.2 Q | 24.6 

 Both Personal and Business........ 7.3 5.9 0.5 0.7 0.2 | 15.4 

 | 

Business Use of PCs Turned on 16 | 

Hours a Week or More | 

 Use to Telecommute................ 3.6 3.1 0.3 0.2 Q | 23.8 

 Other Business Use................ 5.8 4.6 0.3 0.8 0.2 | 17.1 

 | 

Battery Operated Appliances/Tools | 

 Use Battery Operated Appliances/ | 

 Tools............................. 47.7 38.8 2.6 3.7 2.6 | 6.6 

 | 

 How Maintained When | 

 Not in Use | 

 Plugged in All The Time......... 10.8 8.9 0.5 0.9 0.5 | 14.0 

 Recharged As Needed............. 33.8 27.3 2.0 2.5 2.0 | 7.1 

 Both Ways are Used.............. 3.1 2.7 Q Q Q | 20.1 

 Don't Use Any..................... 59.3 34.9 6.9 13.3 4.2 | 5.1 

______________________________________________________________________________________________________|_______

 1 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.