Total U.S. Housing Units.................................. 111.1 72.1 7.6 7.8 16.7 6.9

Do Not Have Heating Equpment...................... 1.2 0.4 Q Q 0.4 Q

Have Space Heating Equpment....................... 109.8 71.7 7.5 7.6 16.3 6.8

Use Space Heating Equpment........................ 109.1 71.5 7.4 7.4 16.0 6.7

Have But Do Not Use Equipment.................... 0.8 QQQQQ

Space Heating Usage During 2005

Heated Floorspace (Square Feet)

None............................................................ 3.6 1.1 Q 0.5 1.3 0.4

1 to 499....................................................... 6.1 2.0 0.4 1.1 2.1 0.6

500 to 999................................................... 27.7 9.8 2.0 3.7 9.0 3.3

1,000 to 1,499............................................. 26.0 16.4 2.1 1.8 3.6 2.1

1,500 to 1,999............................................. 17.6 15.2 1.1 0.4 0.5 0.4

2,000 to 2,499............................................. 10.7 9.5 0.9 Q Q Q

2,500 to 2,999............................................. 7.7 7.1 0.4 Q Q Q

3,000 to 3,499............................................. 3.8 3.6 Q Q N N

3,500 to 3,999............................................. 2.6 2.4 Q Q Q N

4,000 or More.............................................. 5.2 4.9 Q Q Q N

Total Number of Rooms

(Excluding Bathrooms)

0.................................................................. 2.1 0.7 Q Q 0.8 Q

1 or 2........................................................... 3.1 Q Q 0.4 2.4 Q

3.................................................................. 8.3 0.6 0.7 1.3 4.8 0.9

4.................................................................. 16.6 4.6 1.7 2.7 5.4 2.1

5.................................................................. 23.3 14.8 1.6 2.0 2.7 2.3

6.................................................................. 22.6 18.9 1.7 0.6 0.4 0.9

7.................................................................. 16.3 14.8 0.8 Q Q 0.4

8.................................................................. 9.7 8.9 0.5 Q N Q

9 or More..................................................... 9.1 8.4 0.4 Q Q Q

At Home Behavior

Home Used for Business

Yes.......................................................... 8.9 7.4 0.4 Q 0.5 0.4

No............................................................ 102.2 64.6 7.2 7.5 16.3 6.6

Someone Home All Day

Yes.......................................................... 56.4 39.0 3.4 3.6 6.9 3.6

No............................................................ 54.7 33.0 4.2 4.2 9.9 3.4

Housing Unit Characteristics Affecting Usage

Adequacy of Insulation

Well Insulated.............................................. 42.8 29.8 2.3 2.8 6.0 1.9

Adequately Insulated................................... 46.3 29.9 3.6 2.8 7.1 2.9

Poorly Insulated........................................... 19.0 11.2 1.4 1.6 2.8 2.0

No Insulation............................................... 1.4 0.7 QQQQ

Don't Know.................................................. 1.7 0.5 0.3 0.3 0.6 Q

Home is Too Drafty During the Winter

Never........................................................... 62.9 43.1 3.7 3.9 9.0 3.2

Some of the Time........................................ 32.4 20.8 2.6 2.4 4.4 2.2

Most of the Time.......................................... 6.1 3.5 0.3 0.7 1.0 0.6

All of the Time............................................. 5.6 3.1 0.6 0.4 0.9 0.6

Don't Know.................................................. 4.1 1.6 0.4 0.4 1.4 Q

Detached

Type of Housing Unit

Table HC2.5 Space Heating Usage Indicators by Type of Housing Unit, 2005

 Million U.S. Housing Units

Space Heating Usage Indicators Attached 2 to 4 Units 5 or More 

Units

Mobile 

Homes

Apartments in Buildings 

With-- Housing 

Units 

(millions)

Single-Family Units

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Detached

Type of Housing Unit

Table HC2.5 Space Heating Usage Indicators by Type of Housing Unit, 2005

 Million U.S. Housing Units

Space Heating Usage Indicators Attached 2 to 4 Units 5 or More 

Units

Mobile 

Homes

Apartments in Buildings 

With-- Housing 

Units 

(millions)

Single-Family Units

Unusually High Ceilings

Yes.............................................................. 27.2 22.6 1.8 1.2 1.6 N

No............................................................... 76.9 49.5 5.8 6.5 15.1 N

Not Asked (Mobile Homes).......................... 6.9 N N N N 6.9

Cathedral Ceilings

(In Housing Units with High Ceilings)

Yes.......................................................... 17.1 14.9 1.2 0.3 0.7 N

No............................................................ 10.1 7.7 0.6 0.9 0.9 N

Type of Glass in Windows

Single-pane Glass....................................... 50.7 28.9 3.6 4.1 9.5 4.6

Double-pane Glass

Without Low-e Coating............................. 50.6 34.5 3.7 3.3 6.8 2.2

With Low-e Coating.................................. 8.0 7.3 0.3 Q Q Q

Triple-pane Glass

Without Low-e Coating............................. 1.0 0.9 N N Q N

With Low-e Coating.................................. 0.3 0.3 Q Q Q N

Proportion of Original Windows Replaced

All................................................................ 22.4 15.7 1.7 2.1 2.6 0.4

Some........................................................... 21.6 17.1 1.4 1.0 1.0 1.2

None............................................................ 62.3 38.1 3.8 4.0 11.3 5.1

Don't Know.................................................. 4.7 1.1 0.7 0.7 1.9 0.2

Thermostats

Do Not Have a Thermostat............................ 15.3 7.0 0.9 1.6 4.6 1.2

Have a Thermostat........................................ 95.8 65.1 6.7 6.2 12.1 5.7

1.................................................................. 84.5 55.9 6.1 5.8 11.2 5.5

2 or More..................................................... 11.3 9.2 0.6 0.4 0.9 0.2

Have a Programmable Thermostat

Yes.......................................................... 33.1 25.8 2.2 1.7 2.4 1.1

No............................................................ 62.7 39.2 4.5 4.5 9.8 4.6

Use of Programable Thermostats

Reduces Temperature During Day

Yes.......................................................... 18.6 14.7 0.9 1.1 1.1 0.8

No............................................................ 14.5 11.2 1.3 0.6 1.3 0.3

Reduces Temperature at Night

Yes.......................................................... 21.5 16.8 1.3 1.1 1.4 0.8

No............................................................ 11.6 9.0 0.8 0.6 0.9 0.2

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Detached

Type of Housing Unit

Table HC2.5 Space Heating Usage Indicators by Type of Housing Unit, 2005

 Million U.S. Housing Units

Space Heating Usage Indicators Attached 2 to 4 Units 5 or More 

Units

Mobile 

Homes

Apartments in Buildings 

With-- Housing 

Units 

(millions)

Single-Family Units

Winter 2005 Temperature Settings

Lower Temperature Settings

Daytime When No One is at Home

Yes.......................................................... 40.5 29.2 2.8 2.6 3.7 2.3

No............................................................ 59.1 37.7 4.0 4.0 9.5 3.9

Unknown.................................................. 11.4 5.2 0.8 1.2 3.5 0.8

During Sleeping Hours

Yes.......................................................... 40.7 29.8 2.5 2.3 3.8 2.3

No............................................................ 60.2 37.8 4.3 4.5 9.7 3.9

Unknown.................................................. 10.2 4.4 0.8 1.0 3.3 0.7

Daytime Setting When No One is at Home

Heat Turned On........................................... 93.7 63.4 6.5 6.1 11.9 5.9

63 Degrees or Less.................................. 18.9 13.1 1.2 1.5 1.8 1.2

64 to 66 Degrees..................................... 17.4 12.4 1.5 0.9 1.8 0.9

67 to 69 Degrees..................................... 17.8 13.1 1.3 1.0 1.5 0.8

70 Degrees.............................................. 16.0 9.1 1.2 1.0 3.3 1.3

71 to 73 Degrees..................................... 10.2 7.2 0.7 0.7 0.9 0.6

74 Degrees or More................................. 13.5 8.4 0.7 0.9 2.5 0.9

Don't Know/No Answer............................ 7.4 3.4 0.5 0.7 2.2 0.5

Do Not Use Space Heating...................... 1.3 0.4 Q Q 0.5 Q

Heat Turned Off........................................... 8.7 4.9 0.5 0.8 2.1 0.4

Daytime Setting When Someone is at Home

Heat Turned On........................................... 101.5 68.0 6.9 6.7 13.6 6.3

63 Degrees or Less.................................. 4.1 2.6 Q 0.6 0.6 Q

64 to 66 Degrees..................................... 8.2 5.4 0.8 0.6 0.9 0.5

67 to 69 Degrees..................................... 23.6 17.7 1.5 1.3 1.8 1.4

70 Degrees.............................................. 24.6 15.3 2.0 1.5 4.2 1.7

71 to 73 Degrees..................................... 17.6 13.0 1.2 1.1 1.6 0.8

74 Degrees or More................................. 23.2 14.0 1.2 1.7 4.4 1.8

Don't Know/No Answer............................ 6.0 2.6 0.5 0.6 1.9 0.4

Do Not Use Space Heating...................... 1.3 0.4 Q Q 0.5 Q

Heat Turned Off........................................... 2.3 1.1 Q Q 0.8 Q

Setting During Sleeping Hours

Heat Turned On........................................... 98.1 65.8 6.7 6.5 12.9 6.2

63 Degrees or Less.................................. 13.0 9.3 0.8 1.1 1.1 0.8

64 to 66 Degrees..................................... 18.4 13.4 1.2 1.0 1.7 1.1

67 to 69 Degrees..................................... 20.8 15.2 1.5 1.2 1.9 1.0

70 Degrees.............................................. 18.5 10.7 1.3 1.2 3.6 1.7

71 to 73 Degrees..................................... 11.1 7.9 0.7 0.6 1.4 0.5

74 Degrees or More................................. 16.3 9.3 1.1 1.5 3.2 1.1

Don't Know/No Answer............................ 6.4 2.9 0.4 0.6 2.0 0.4

Do Not Use Space Heating...................... 1.3 0.4 Q Q 0.5 Q

Heat Turned Off........................................... 5.4 3.0 0.4 0.5 1.3 0.2

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Detached

Type of Housing Unit

Table HC2.5 Space Heating Usage Indicators by Type of Housing Unit, 2005

 Million U.S. Housing Units

Space Heating Usage Indicators Attached 2 to 4 Units 5 or More 

Units

Mobile 

Homes

Apartments in Buildings 

With-- Housing 

Units 

(millions)

Single-Family Units

Secondary Heating

Use Any Secondary Heating Equipment

Yes.............................................................. 34.9 28.8 1.5 1.2 1.6 1.8

No............................................................... 74.9 42.9 6.0 6.4 14.6 5.0

Proportion of Heat Provided by

Secondary Heating Equipment

Close to One-Half.................................... 4.4 3.5 Q Q 0.4 Q

About One-Quarter.................................. 5.8 5.0 Q Q 0.2 0.4

Very Little or None................................... 24.7 20.4 1.1 0.9 1.0 1.3

Type of Supplemental Heating Equipment Used

Heat Pump.................................................. 0.6 0.6 N N Q N

Central Warm-Air Furnace........................... 2.3 2.0 N Q Q Q

Steam/Hot Water System............................ Q Q Q N N N

Built-in Electric Units................................... 2.2 1.9 QQQQ

Built-in Pipeless Furnace............................. 0.3 Q N Q N Q

Built-in Room Heaters................................. 1.4 1.3 Q N N Q

Heating Stove.............................................. 2.1 2.0 Q N N Q

Portable Electric Heaters............................. 14.3 10.8 0.8 0.7 1.1 0.9

Portable Kerosene Heaters......................... 0.6 0.5 Q N N Q

Cooking Stove............................................. 0.5 0.2 QQQQ

Fireplace..................................................... 10.5 9.3 0.4 0.3 Q Q

Fireplace Fuel

Wood....................................................... 6.9 6.1 QQQQ

Natural Gas.............................................. 2.7 2.3 0.2 Q Q N

Propane................................................... 0.9 0.9 NNNN

Use of Gas Fireplace

During Winter Months

Most Days............................................ 1.2 1.0 Q Q Q N

About Once a Week............................. 1.3 1.2 Q N N N

Less than 4 Times each Month............ 1.1 1.0 Q Q Q N

Humidifier Use Each Year

Use a Humidifier............................................. 14.2 10.9 1.1 0.5 1.3 0.5

1 to 3 Months Each Year............................. 7.1 5.1 0.6 0.2 0.8 0.3

4 to 6 Months Each Year............................. 5.6 4.6 0.3 Q 0.4 Q

7 to 9 Months Each Year............................. 0.4 0.3 Q N N Q

10 to 11 months........................................... Q Q NNNN

Turned on All Year Long.............................. 1.1 0.8 QQQQ

Do Not Use a Humidifier.................................. 96.9 61.2 6.5 7.3 15.5 6.4

 Q = Data withheld either because the Relative Standard Error (RSE) was greater than 50 percent or fewer than 10 households were 

sampled.

 N = No cases in reporting sample.

 Notes: ● Because of rounding, data may not sum to totals. ● See Glossary for definition of terms used in these tables.

 Source: Energy Information Administration, Office of Energy Markets and End Use, Forms EIA-457 A, B, C of the 2005 

Residential Energy Consumption Survey.

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Total U.S. Housing Units................................. 111.1 78.1 64.1 4.2 1.8 2.3 5.7

Do Not Have Heating Equpment..................... 1.2 0.6 0.3 N Q Q Q

Have Space Heating Equpment...................... 109.8 77.5 63.7 4.2 1.8 2.2 5.6

Use Space Heating Equpment....................... 109.1 77.2 63.6 4.2 1.8 2.1 5.6

Have But Do Not Use Equipment................... 0.8 0.3 Q N Q Q Q

Space Heating Usage During 2005

Heated Floorspace (Square Feet)

None........................................................... 3.6 1.5 0.9 Q Q Q 0.3

1 to 499...................................................... 6.1 2.8 1.6 Q Q 0.3 0.5

500 to 999.................................................. 27.7 11.9 7.7 0.6 0.3 0.8 2.5

1,000 to 1,499............................................ 26.0 18.4 14.0 1.1 0.8 0.7 1.9

1,500 to 1,999............................................ 17.6 15.3 13.8 0.8 Q Q 0.3

2,000 to 2,499............................................ 10.7 10.0 9.1 0.7 Q Q Q

2,500 to 2,999............................................ 7.7 7.2 6.7 0.3 Q Q Q

3,000 to 3,499............................................ 3.8 3.6 3.5 Q Q N N

3,500 to 3,999............................................ 2.6 2.5 2.3 Q Q Q N

4,000 or More............................................. 5.2 5.0 4.7 Q Q Q N

Total Number of Rooms

(Excluding Bathrooms)

0................................................................. 2.1 0.7 0.6 Q Q Q Q

1 or 2.......................................................... 3.1 0.4 Q N N Q Q

3................................................................. 8.3 1.4 0.3 Q Q 0.3 0.7

4................................................................. 16.6 7.3 3.5 0.6 0.6 1.0 1.6

5................................................................. 23.3 16.3 12.5 0.9 0.4 0.5 2.0

6................................................................. 22.6 19.1 16.8 1.2 0.3 Q 0.7

7................................................................. 16.3 15.0 13.8 0.6 Q Q 0.4

8................................................................. 9.7 9.1 8.5 0.4 Q N Q

9 or More.................................................... 9.1 8.8 8.1 0.4 Q Q Q

At Home Behavior

Home Used for Business

Yes......................................................... 8.9 7.7 6.9 0.3 Q Q 0.4

No........................................................... 102.2 70.4 57.1 3.8 1.8 2.2 5.4

Someone Home All Day

Yes......................................................... 56.4 41.4 34.6 1.8 0.9 1.0 3.0

No........................................................... 54.7 36.7 29.4 2.3 0.9 1.3 2.8

Housing Unit Characteristics Affecting Usage

Adequacy of Insulation

Well Insulated............................................. 42.8 32.8 27.8 1.5 1.0 0.9 1.6

Adequately Insulated.................................. 46.3 33.0 26.8 2.1 0.5 1.0 2.4

Poorly Insulated.......................................... 19.0 11.1 8.5 0.5 0.2 0.3 1.5

No Insulation.............................................. 1.4 0.8 0.6 N Q Q Q

Don't Know................................................. 1.7 0.4 0.3 N Q Q Q

Home is Too Drafty During the Winter

Never.......................................................... 62.9 47.6 39.6 2.3 1.2 1.5 2.9

Some of the Time....................................... 32.4 22.5 18.2 1.5 0.5 0.5 1.7

Most of the Time......................................... 6.1 3.5 2.7 Q Q Q 0.5

All of the Time............................................ 5.6 3.1 2.3 Q Q Q 0.5

Don't Know................................................. 4.1 1.4 1.3 Q N Q Q

Table HC3.5 Space Heating Usage Indicators by Owner-Occupied Housing Unit, 2005

 OwnerOccupied 

Housing 

Units 

(millions)

Type of Owner-Occupied Housing Unit

U.S.

Housing 

Units 

(millions

Single-Family Units Apartments in 

Buildings With--

Space Heating Usage Indicators

 Million U.S. Housing Units

Detached Attached 2 to 4 

Units

5 or More 

Units

Mobile 

Homes

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Table HC3.5 Space Heating Usage Indicators by Owner-Occupied Housing Unit, 2005

 OwnerOccupied 

Housing 

Units 

(millions)

Type of Owner-Occupied Housing Unit

U.S.

Housing 

Units 

(millions

Single-Family Units Apartments in 

Buildings With--

Space Heating Usage Indicators

 Million U.S. Housing Units

Detached Attached 2 to 4 

Units

5 or More 

Units

Mobile 

Homes

Unusually High Ceilings

Yes............................................................. 27.2 23.7 21.3 1.5 0.5 0.3 N

No.............................................................. 76.9 48.7 42.7 2.7 1.4 2.0 N

Not Asked (Mobile Homes)......................... 6.9 5.7 N N N N 5.7

Cathedral Ceilings

(In Housing Units with High Ceilings)

Yes......................................................... 17.1 15.5 14.3 1.0 Q Q N

No........................................................... 10.1 8.1 7.1 0.5 0.3 Q N

Type of Glass in Windows

Single-pane Glass...................................... 50.7 30.6 23.6 1.3 0.7 1.2 3.8

Double-pane Glass

Without Low-e Coating............................ 50.6 38.5 32.1 2.6 1.0 1.0 1.9

With Low-e Coating................................ 8.0 7.5 7.0 0.3 Q Q Q

Triple-pane Glass

Without Low-e Coating............................ 1.0 0.8 0.8 N N N N

With Low-e Coating................................ 0.3 0.3 0.3 Q Q Q N

Proportion of Original Windows Replaced

All............................................................... 22.4 16.9 14.4 1.2 0.6 0.4 0.4

Some.......................................................... 21.6 18.2 15.8 0.9 0.4 Q 0.9

None........................................................... 62.3 42.2 33.2 2.1 0.9 1.7 4.3

Don't Know................................................. 4.7 0.9 0.7 N Q Q Q

Thermostats

Do Not Have a Thermostat........................... 15.3 7.7 5.8 0.3 Q 0.3 1.1

Have a Thermostat....................................... 95.8 70.4 58.3 3.8 1.6 2.0 4.7

1................................................................. 84.5 60.7 49.4 3.4 1.4 1.9 4.5

2 or More.................................................... 11.3 9.7 8.9 0.4 Q Q Q

Have a Programmable Thermostat

Yes......................................................... 33.1 27.7 23.9 1.6 0.6 0.8 0.8

No........................................................... 62.7 42.6 34.4 2.2 1.0 1.2 3.9

Use of Programable Thermostats

Reduces Temperature During Day

Yes......................................................... 18.6 16.2 14.0 0.8 0.5 0.4 0.6

No........................................................... 14.5 11.5 10.0 0.9 Q 0.3 0.2

Reduces Temperature at Night

Yes......................................................... 21.5 18.6 15.9 1.1 0.5 0.5 0.7

No........................................................... 11.6 9.1 8.1 0.6 Q Q Q

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Table HC3.5 Space Heating Usage Indicators by Owner-Occupied Housing Unit, 2005

 OwnerOccupied 

Housing 

Units 

(millions)

Type of Owner-Occupied Housing Unit

U.S.

Housing 

Units 

(millions

Single-Family Units Apartments in 

Buildings With--

Space Heating Usage Indicators

 Million U.S. Housing Units

Detached Attached 2 to 4 

Units

5 or More 

Units

Mobile 

Homes

Winter 2005 Temperature Settings

Lower Temperature Settings

Daytime When No One is at Home

Yes......................................................... 40.5 31.3 26.2 1.6 1.1 0.6 1.9

No........................................................... 59.1 41.3 33.8 2.3 0.7 1.3 3.2

Unknown................................................. 11.4 5.5 4.1 Q Q 0.4 0.6

During Sleeping Hours

Yes......................................................... 40.7 33.3 27.6 1.8 0.9 0.7 2.1

No........................................................... 60.2 40.2 32.9 2.1 0.9 1.3 3.0

Unknown................................................. 10.2 4.7 3.5 Q Q 0.3 0.6

Daytime Setting When No One is at Home

Heat Turned On.......................................... 93.7 68.7 56.7 3.8 1.7 1.6 4.9

63 Degrees or Less................................. 18.9 13.9 11.5 0.6 0.5 Q 1.0

64 to 66 Degrees.................................... 17.4 13.5 11.4 1.0 0.3 Q 0.7

67 to 69 Degrees.................................... 17.8 14.4 12.2 1.0 0.3 Q 0.7

70 Degrees............................................. 16.0 10.3 8.0 0.6 Q 0.4 1.1

71 to 73 Degrees.................................... 10.2 7.8 6.5 0.4 Q Q 0.6

74 Degrees or More................................ 13.5 8.7 7.2 0.3 Q 0.4 0.7

Don't Know/No Answer........................... 7.4 3.5 2.7 Q Q Q 0.4

Do Not Use Space Heating..................... 1.3 0.6 0.3 N Q Q Q

Heat Turned Off.......................................... 8.7 5.3 4.3 Q N 0.4 0.3

Daytime Setting When Someone is at Home

Heat Turned On.......................................... 101.5 73.9 60.9 4.0 1.8 1.9 5.2

63 Degrees or Less................................. 4.1 2.4 2.1 Q Q N Q

64 to 66 Degrees.................................... 8.2 6.1 5.0 0.5 Q Q 0.3

67 to 69 Degrees.................................... 23.6 19.5 16.6 1.1 0.3 Q 1.2

70 Degrees............................................. 24.6 17.0 13.7 1.0 0.4 0.5 1.4

71 to 73 Degrees.................................... 17.6 14.1 11.8 0.7 0.4 Q 0.8

74 Degrees or More................................ 23.2 14.7 11.6 0.4 0.4 0.8 1.5

Don't Know/No Answer........................... 6.0 2.5 1.9 Q Q Q 0.4

Do Not Use Space Heating..................... 1.3 0.6 0.3 N Q Q Q

Heat Turned Off.......................................... 2.3 1.1 0.9 Q N Q Q

Setting During Sleeping Hours

Heat Turned On.......................................... 98.1 71.5 58.8 3.9 1.8 1.8 5.1

63 Degrees or Less................................. 13.0 10.1 8.4 0.7 Q Q 0.7

64 to 66 Degrees.................................... 18.4 14.9 12.5 0.9 0.5 Q 0.8

67 to 69 Degrees.................................... 20.8 16.8 14.2 1.1 0.4 0.3 0.9

70 Degrees............................................. 18.5 11.8 9.2 0.7 Q 0.4 1.4

71 to 73 Degrees.................................... 11.1 8.2 7.0 0.3 Q Q 0.5

74 Degrees or More................................ 16.3 9.6 7.6 0.4 Q 0.5 0.9

Don't Know/No Answer........................... 6.4 2.9 2.2 Q Q Q 0.3

Do Not Use Space Heating..................... 1.3 0.6 0.3 N Q Q Q

Heat Turned Off.......................................... 5.4 3.1 2.6 Q N Q Q

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Table HC3.5 Space Heating Usage Indicators by Owner-Occupied Housing Unit, 2005

 OwnerOccupied 

Housing 

Units 

(millions)

Type of Owner-Occupied Housing Unit

U.S.

Housing 

Units 

(millions

Single-Family Units Apartments in 

Buildings With--

Space Heating Usage Indicators

 Million U.S. Housing Units

Detached Attached 2 to 4 

Units

5 or More 

Units

Mobile 

Homes

Secondary Heating

Use Any Secondary Heating Equipment

Yes............................................................. 34.9 29.7 26.7 0.9 0.4 Q 1.6

No.............................................................. 74.9 47.8 37.0 3.2 1.4 2.0 4.1

Proportion of Heat Provided by

Secondary Heating Equipment

Close to One-Half................................... 4.4 3.5 3.2 Q N N Q

About One-Quarter................................. 5.8 5.0 4.6 Q Q N 0.3

Very Little or None.................................. 24.7 21.2 18.9 0.7 0.3 Q 1.1

Type of Supplemental Heating Equipment Used

Heat Pump................................................. 0.6 0.6 0.6 N N N N

Central Warm-Air Furnace.......................... 2.3 2.2 2.0 N N N Q

Steam/Hot Water System........................... Q Q Q Q N N N

Built-in Electric Units.................................. 2.2 1.8 1.7 Q N N Q

Built-in Pipeless Furnace............................ 0.3 Q Q N N N N

Built-in Room Heaters................................ 1.4 1.4 1.3 Q N N Q

Heating Stove............................................. 2.1 1.9 1.9 Q N N Q

Portable Electric Heaters............................ 14.3 10.8 9.4 0.4 0.2 Q 0.8

Portable Kerosene Heaters........................ 0.6 0.5 0.4 Q N N Q

Cooking Stove............................................ 0.5 0.3 Q Q N N Q

Fireplace.................................................... 10.5 9.7 8.9 0.3 Q Q Q

Fireplace Fuel

Wood...................................................... 6.9 6.3 5.8 Q Q Q Q

Natural Gas............................................ 2.7 2.5 2.2 Q Q Q N

Propane.................................................. 0.9 0.9 0.9 N N N N

Use of Gas Fireplace

During Winter Months

Most Days........................................... 1.2 1.1 1.0 Q Q N N

About Once a Week............................ 1.3 1.2 1.1 Q N N N

Less than 4 Times each Month........... 1.1 1.1 1.0 Q Q Q N

Humidifier Use Each Year

Use a Humidifier............................................ 14.2 12.0 10.3 0.8 0.3 Q 0.5

1 to 3 Months Each Year............................ 7.1 5.6 4.8 0.3 Q Q 0.3

4 to 6 Months Each Year............................ 5.6 5.1 4.5 Q Q Q Q

7 to 9 Months Each Year............................ 0.4 0.4 0.2 Q N N Q

10 to 11 months.......................................... Q Q Q N N N N

Turned on All Year Long............................. 1.1 0.9 0.7 Q N Q Q

Do Not Use a Humidifier................................ 96.9 66.1 53.8 3.4 1.5 2.1 5.3

 Q = Data withheld either because the Relative Standard Error (RSE) was greater than 50 percent or fewer than 10 households were 

sampled.

 N = No cases in reporting sample.

 Notes: ● Because of rounding, data may not sum to totals. ● See Glossary for definition of terms used in these tables.

 Source: Energy Information Administration, Office of Energy Markets and End Use, Forms EIA-457 A, B, C of the 2005 

Residential Energy Consumption Survey.

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Total U.S. Housing Units................................. 111.1 33.0 8.0 3.4 5.9 14.4 1.2

Do Not Have Heating Equpment..................... 1.2 0.6 Q Q Q 0.3 Q

Have Space Heating Equpment...................... 109.8 32.3 8.0 3.3 5.8 14.1 1.1

Use Space Heating Equpment....................... 109.1 31.8 8.0 3.2 5.6 13.9 1.1

Have But Do Not Use Equipment................... 0.8 0.5 N Q Q Q Q

Space Heating Usage During 2005

Heated Floorspace (Square Feet)

None........................................................... 3.6 2.1 Q Q 0.4 1.1 Q

1 to 499...................................................... 6.1 3.3 0.4 Q 0.8 1.8 Q

500 to 999.................................................. 27.7 15.9 2.1 1.4 3.4 8.2 0.8

1,000 to 1,499............................................ 26.0 7.6 2.5 1.0 1.1 2.9 Q

1,500 to 1,999............................................ 17.6 2.3 1.5 0.3 0.2 0.3 Q

2,000 to 2,499............................................ 10.7 0.7 0.4 0.2 Q Q N

2,500 to 2,999............................................ 7.7 0.5 0.4 Q N Q N

3,000 to 3,499............................................ 3.8 Q Q N N N N

3,500 to 3,999............................................ 2.6 Q Q N N N N

4,000 or More............................................. 5.2 0.2 0.2 N N Q N

Total Number of Rooms

(Excluding Bathrooms)

0................................................................. 2.1 1.3 Q Q Q 0.7 Q

1 or 2.......................................................... 3.1 2.7 Q Q 0.4 2.2 N

3................................................................. 8.3 6.9 0.4 0.6 1.2 4.4 Q

4................................................................. 16.6 9.3 1.2 1.2 2.1 4.4 0.5

5................................................................. 23.3 7.1 2.4 0.7 1.6 2.2 0.3

6................................................................. 22.6 3.4 2.1 0.5 0.3 0.4 Q

7................................................................. 16.3 1.4 1.0 0.2 Q Q Q

8................................................................. 9.7 0.6 0.4 Q Q N N

9 or More.................................................... 9.1 0.4 0.4 N Q Q N

At Home Behavior

Home Used for Business

Yes......................................................... 8.9 1.1 0.5 Q Q 0.4 Q

No........................................................... 102.2 31.9 7.5 3.4 5.7 14.1 1.2

Someone Home All Day

Yes......................................................... 56.4 15.0 4.4 1.6 2.7 5.8 0.6

No........................................................... 54.7 17.9 3.6 1.9 3.2 8.6 0.6

Housing Unit Characteristics Affecting Usage

Adequacy of Insulation

Well Insulated............................................. 42.8 10.0 2.0 0.8 1.8 5.1 0.2

Adequately Insulated.................................. 46.3 13.3 3.0 1.5 2.2 6.1 0.4

Poorly Insulated.......................................... 19.0 7.9 2.6 0.8 1.4 2.5 0.5

No Insulation.............................................. 1.4 0.5 QQQQ N

Don't Know................................................. 1.7 1.3 Q 0.3 0.3 0.5 Q

Home is Too Drafty During the Winter

Never.......................................................... 62.9 15.3 3.5 1.4 2.6 7.5 0.4

Some of the Time....................................... 32.4 9.9 2.6 1.1 1.9 3.8 0.5

Most of the Time......................................... 6.1 2.6 0.8 0.2 0.7 0.9 Q

All of the Time............................................ 5.6 2.5 0.8 0.4 0.3 0.9 Q

Don't Know................................................. 4.1 2.6 0.4 0.4 0.4 1.4 Q

2 to 4 

Units

5 or More 

Units

Mobile 

Homes

Table HC4.5 Space Heating Usage Indicators by Renter-Occupied Housing Unit, 2005

 RenterOccupied 

Housing 

Units 

(millions)

Type of Renter-Occupied Housing Unit

U.S.

Housing 

Units 

(millions

Single-Family Units Apartments in 

Buildings With--

Space Heating Usage Indicators

 Million U.S. Housing Units

Detached Attached

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
2 to 4 

Units

5 or More 

Units

Mobile 

Homes

Table HC4.5 Space Heating Usage Indicators by Renter-Occupied Housing Unit, 2005

 RenterOccupied 

Housing 

Units 

(millions)

Type of Renter-Occupied Housing Unit

U.S.

Housing 

Units 

(millions

Single-Family Units Apartments in 

Buildings With--

Space Heating Usage Indicators

 Million U.S. Housing Units

Detached Attached

Unusually High Ceilings

Yes............................................................. 27.2 3.6 1.3 0.3 0.7 1.3 N

No.............................................................. 76.9 28.2 6.7 3.1 5.2 13.2 N

Not Asked (Mobile Homes)......................... 6.9 1.2 N N N N 1.2

Cathedral Ceilings

(In Housing Units with High Ceilings)

Yes......................................................... 17.1 1.6 0.6 Q Q 0.6 N

No........................................................... 10.1 2.0 0.6 Q 0.6 0.7 N

Type of Glass in Windows

Single-pane Glass...................................... 50.7 20.1 5.3 2.3 3.4 8.2 0.9

Double-pane Glass

Without Low-e Coating............................ 50.6 12.1 2.4 1.2 2.4 5.9 0.3

With Low-e Coating................................ 8.0 0.5 Q N Q Q Q

Triple-pane Glass

Without Low-e Coating............................ 1.0 Q Q N N Q N

With Low-e Coating................................ 0.3 NNNNN N

Proportion of Original Windows Replaced

All............................................................... 22.4 5.6 1.3 0.5 1.5 2.2 Q

Some.......................................................... 21.6 3.5 1.3 0.5 0.6 0.9 Q

None........................................................... 62.3 20.1 4.9 1.8 3.1 9.6 0.8

Don't Know................................................. 4.7 3.8 0.5 0.7 0.7 1.8 Q

Thermostats

Do Not Have a Thermostat........................... 15.3 7.5 1.2 0.5 1.4 4.2 Q

Have a Thermostat....................................... 95.8 25.4 6.8 2.9 4.6 10.2 1.0

1................................................................. 84.5 23.8 6.5 2.7 4.3 9.3 1.0

2 or More.................................................... 11.3 1.7 0.3 0.2 0.2 0.9 Q

Have a Programmable Thermostat

Yes......................................................... 33.1 5.4 1.9 0.5 1.0 1.6 0.3

No........................................................... 62.7 20.1 4.9 2.3 3.5 8.6 0.8

Use of Programable Thermostats

Reduces Temperature During Day

Yes......................................................... 18.6 2.3 0.7 0.2 0.6 0.7 Q

No........................................................... 14.5 3.0 1.2 0.4 0.4 1.0 Q

Reduces Temperature at Night

Yes......................................................... 21.5 2.9 0.9 0.3 0.6 0.9 Q

No........................................................... 11.6 2.5 1.0 0.3 0.4 0.7 Q

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
2 to 4 

Units

5 or More 

Units

Mobile 

Homes

Table HC4.5 Space Heating Usage Indicators by Renter-Occupied Housing Unit, 2005

 RenterOccupied 

Housing 

Units 

(millions)

Type of Renter-Occupied Housing Unit

U.S.

Housing 

Units 

(millions

Single-Family Units Apartments in 

Buildings With--

Space Heating Usage Indicators

 Million U.S. Housing Units

Detached Attached

Winter 2005 Temperature Settings

Lower Temperature Settings

Daytime When No One is at Home

Yes......................................................... 40.5 9.2 3.0 1.2 1.5 3.1 0.4

No........................................................... 59.1 17.8 4.0 1.7 3.3 8.1 0.7

Unknown................................................. 11.4 6.0 1.0 0.6 1.1 3.1 Q

During Sleeping Hours

Yes......................................................... 40.7 7.4 2.2 0.7 1.3 3.0 Q

No........................................................... 60.2 20.1 4.9 2.2 3.6 8.5 0.9

Unknown................................................. 10.2 5.5 0.9 0.6 1.0 3.0 Q

Daytime Setting When No One is at Home

Heat Turned On.......................................... 93.7 25.1 6.7 2.7 4.3 10.3 1.0

63 Degrees or Less................................. 18.9 5.0 1.6 0.6 1.0 1.6 Q

64 to 66 Degrees.................................... 17.4 3.9 1.0 0.5 0.6 1.6 Q

67 to 69 Degrees.................................... 17.8 3.3 0.9 0.3 0.7 1.3 Q

70 Degrees............................................. 16.0 5.7 1.1 0.5 0.9 2.9 0.2

71 to 73 Degrees.................................... 10.2 2.4 0.7 0.3 0.5 0.8 Q

74 Degrees or More................................ 13.5 4.8 1.3 0.4 0.8 2.1 Q

Don't Know/No Answer........................... 7.4 3.9 0.7 0.4 0.7 2.1 Q

Do Not Use Space Heating..................... 1.3 0.6 Q Q Q 0.3 Q

Heat Turned Off.......................................... 8.7 3.4 0.6 0.2 0.8 1.7 Q

Daytime Setting When Someone is at Home

Heat Turned On.......................................... 101.5 27.6 7.1 2.9 5.0 11.6 1.1

63 Degrees or Less................................. 4.1 1.7 0.5 Q 0.5 0.6 Q

64 to 66 Degrees.................................... 8.2 2.1 0.5 0.3 0.4 0.7 Q

67 to 69 Degrees.................................... 23.6 4.1 1.0 0.4 0.9 1.6 Q

70 Degrees............................................. 24.6 7.6 1.6 0.9 1.1 3.7 0.3

71 to 73 Degrees.................................... 17.6 3.6 1.1 0.5 0.6 1.3 Q

74 Degrees or More................................ 23.2 8.5 2.4 0.8 1.3 3.7 0.3

Don't Know/No Answer........................... 6.0 3.5 0.7 0.4 0.6 1.8 Q

Do Not Use Space Heating..................... 1.3 0.6 Q Q Q 0.3 Q

Heat Turned Off.......................................... 2.3 1.2 0.3 Q Q 0.7 N

Setting During Sleeping Hours

Heat Turned On.......................................... 98.1 26.6 6.9 2.8 4.7 11.1 1.0

63 Degrees or Less................................. 13.0 2.8 0.9 Q 0.8 1.0 Q

64 to 66 Degrees.................................... 18.4 3.6 0.9 0.4 0.6 1.5 0.2

67 to 69 Degrees.................................... 20.8 3.9 1.0 0.5 0.8 1.5 Q

70 Degrees............................................. 18.5 6.7 1.5 0.6 1.0 3.2 0.3

71 to 73 Degrees.................................... 11.1 2.9 0.9 0.4 0.4 1.1 Q

74 Degrees or More................................ 16.3 6.7 1.7 0.8 1.2 2.8 0.3

Don't Know/No Answer........................... 6.4 3.5 0.7 0.3 0.6 1.9 Q

Do Not Use Space Heating..................... 1.3 0.6 Q Q Q 0.3 Q

Heat Turned Off.......................................... 5.4 2.2 0.4 Q 0.5 1.1 Q

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
2 to 4 

Units

5 or More 

Units

Mobile 

Homes

Table HC4.5 Space Heating Usage Indicators by Renter-Occupied Housing Unit, 2005

 RenterOccupied 

Housing 

Units 

(millions)

Type of Renter-Occupied Housing Unit

U.S.

Housing 

Units 

(millions

Single-Family Units Apartments in 

Buildings With--

Space Heating Usage Indicators

 Million U.S. Housing Units

Detached Attached

Secondary Heating

Use Any Secondary Heating Equipment

Yes............................................................. 34.9 5.2 2.2 0.5 0.8 1.5 0.2

No.............................................................. 74.9 27.1 5.8 2.8 5.0 12.6 0.9

Proportion of Heat Provided by

Secondary Heating Equipment

Close to One-Half................................... 4.4 0.9 0.3 Q Q 0.4 Q

About One-Quarter................................. 5.8 0.8 0.4 Q Q 0.2 Q

Very Little or None.................................. 24.7 3.5 1.5 0.5 0.6 0.9 Q

Type of Supplemental Heating Equipment Used

Heat Pump................................................. 0.6 Q N N N Q N

Central Warm-Air Furnace.......................... 2.3 Q Q N Q Q Q

Steam/Hot Water System........................... Q NNNNN N

Built-in Electric Units.................................. 2.2 0.3 QQQQ Q

Built-in Pipeless Furnace............................ 0.3 Q N N Q N Q

Built-in Room Heaters................................ 1.4 Q Q N N N N

Heating Stove............................................. 2.1 Q Q N N N N

Portable Electric Heaters............................ 14.3 3.4 1.3 0.4 0.5 1.1 Q

Portable Kerosene Heaters........................ 0.6 Q Q N N N Q

Cooking Stove............................................ 0.5 0.2 QQQQ N

Fireplace.................................................... 10.5 0.8 0.4 Q Q Q Q

Fireplace Fuel

Wood...................................................... 6.9 0.5 0.3 Q Q Q Q

Natural Gas............................................ 2.7 0.2 QQQQ N

Propane.................................................. 0.9 NNNNN N

Use of Gas Fireplace

During Winter Months

Most Days........................................... 1.2 QQQQQ N

About Once a Week............................ 1.3 Q Q Q N N N

Less than 4 Times each Month........... 1.1 Q Q N N N N

Humidifier Use Each Year

Use a Humidifier............................................ 14.2 2.2 0.6 0.3 0.2 1.1 Q

1 to 3 Months Each Year............................ 7.1 1.5 0.4 0.3 Q 0.7 Q

4 to 6 Months Each Year............................ 5.6 0.5 Q Q Q 0.3 Q

7 to 9 Months Each Year............................ 0.4 Q Q N N N N

10 to 11 months.......................................... Q NNNNN N

Turned on All Year Long............................. 1.1 0.2 QQQQ N

Do Not Use a Humidifier................................ 96.9 30.8 7.4 3.1 5.7 13.4 1.1

 Q = Data withheld either because the Relative Standard Error (RSE) was greater than 50 percent or fewer than 10 households were 

sampled.

 N = No cases in reporting sample.

 Notes: ● Because of rounding, data may not sum to totals. ● See Glossary for definition of terms used in these tables.

 Source: Energy Information Administration, Office of Energy Markets and End Use, Forms EIA-457 A, B, C of the 2005 

Residential Energy Consumption Survey.

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Total U.S. Housing Units................................. 111.1 14.7 7.4 12.5 12.5 18.9 18.6 17.3 9.2

Do Not Have Heating Equpment..................... 1.2 N Q Q 0.2 0.4 0.2 0.2 Q

Have Space Heating Equpment...................... 109.8 14.7 7.4 12.4 12.2 18.5 18.3 17.1 9.2

Use Space Heating Equpment....................... 109.1 14.6 7.3 12.4 12.2 18.2 18.2 17.1 9.1

Have But Do Not Use Equipment................... 0.8 Q Q Q Q 0.3 Q N Q

Space Heating Usage During 2005

Heated Floorspace (Square Feet)

None........................................................... 3.6 Q 0.3 0.2 0.6 1.0 0.5 0.5 Q

1 to 499...................................................... 6.1 1.2 0.4 0.7 0.9 1.3 0.8 0.6 0.2

500 to 999.................................................. 27.7 3.8 2.4 3.2 2.9 5.3 5.5 3.4 1.3

1,000 to 1,499............................................ 26.0 3.4 1.7 3.4 2.9 4.6 4.2 4.0 1.9

1,500 to 1,999............................................ 17.6 2.2 1.0 2.4 2.1 3.0 2.5 2.8 1.6

2,000 to 2,499............................................ 10.7 1.5 0.6 1.2 1.1 1.6 2.1 1.5 1.1

2,500 to 2,999............................................ 7.7 0.8 0.5 0.7 1.0 0.8 1.3 1.7 0.9

3,000 to 3,499............................................ 3.8 0.6 Q Q 0.4 0.6 0.4 0.8 0.5

3,500 to 3,999............................................ 2.6 0.5 Q Q 0.3 Q 0.3 0.6 0.4

4,000 or More............................................. 5.2 0.6 Q 0.3 Q 0.6 0.9 1.5 0.9

Total Number of Rooms

(Excluding Bathrooms)

0................................................................. 2.1 Q Q Q 0.3 0.5 0.2 0.3 Q

1 or 2.......................................................... 3.1 0.5 Q 0.4 0.4 0.6 0.4 0.4 Q

3................................................................. 8.3 0.9 0.5 0.6 1.0 1.7 1.9 1.1 0.6

4................................................................. 16.6 2.5 1.2 2.0 1.6 3.4 2.9 2.2 0.7

5................................................................. 23.3 2.8 1.8 3.3 2.4 4.0 3.8 3.3 1.9

6................................................................. 22.6 2.5 1.6 3.4 2.8 3.5 3.7 3.4 1.7

7................................................................. 16.3 2.5 1.0 1.7 2.0 2.6 2.7 2.4 1.4

8................................................................. 9.7 1.4 0.4 0.6 1.0 1.4 1.7 2.0 1.2

9 or More.................................................... 9.1 1.4 0.4 0.5 1.0 1.2 1.4 2.1 1.3

At Home Behavior

Home Used for Business

Yes......................................................... 8.9 1.2 0.3 0.5 0.8 1.5 1.4 2.2 1.1

No........................................................... 102.2 13.5 7.1 12.1 11.6 17.4 17.2 15.1 8.1

Someone Home All Day

Yes......................................................... 56.4 7.7 4.0 7.2 6.6 9.3 8.5 8.4 4.7

No........................................................... 54.7 7.0 3.4 5.4 5.9 9.6 10.1 8.9 4.5

Housing Unit Characteristics Affecting Usage

Adequacy of Insulation

Well Insulated............................................. 42.8 3.9 2.2 4.0 4.4 6.5 7.4 8.8 5.7

Adequately Insulated.................................. 46.3 5.8 3.4 5.4 5.0 8.8 8.1 6.9 2.8

Poorly Insulated.......................................... 19.0 4.2 1.7 2.7 2.7 3.1 2.5 1.5 0.6

No Insulation.............................................. 1.4 0.3 Q 0.3 Q Q 0.2 Q Q

Don't Know................................................. 1.7 0.3 Q Q 0.2 0.3 0.4 Q Q

Home is Too Drafty During the Winter

Never.......................................................... 62.9 5.8 4.0 6.9 6.3 11.0 10.9 11.6 6.5

Some of the Time....................................... 32.4 5.5 2.4 4.0 4.0 5.3 5.5 4.1 1.7

Most of the Time......................................... 6.1 1.5 0.4 0.7 0.7 1.1 0.8 0.5 0.3

All of the Time............................................ 5.6 1.4 0.4 0.6 1.0 0.9 0.7 0.6 Q

Don't Know................................................. 4.1 0.6 Q 0.3 0.4 0.7 0.7 0.7 0.5

1990 to 

1999

2000 to 

Space Heating Usage Indicators 2005

 Million U.S. Housing Units

Table HC5.5 Space Heating Usage Indicators by Year of Construction, 2005

Year of Construction

Housing 

Units 

(millions)

Before 

1940

1940 to 

1949

1950 to 

1959

1960 to 

1969

1970 to 

1979

1980 to 

1989

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
1990 to 

1999

2000 to 

Space Heating Usage Indicators 2005

 Million U.S. Housing Units

Table HC5.5 Space Heating Usage Indicators by Year of Construction, 2005

Year of Construction

Housing 

Units 

(millions)

Before 

1940

1940 to 

1949

1950 to 

1959

1960 to 

1969

1970 to 

1979

1980 to 

1989

Unusually High Ceilings

Yes............................................................. 27.2 3.4 0.9 1.1 1.2 2.6 5.7 7.8 4.6

No.............................................................. 76.9 11.2 6.5 11.3 10.8 14.3 11.0 7.7 4.1

Not Asked (Mobile Homes)......................... 6.9 Q N Q 0.4 2.0 1.9 1.9 0.5

Cathedral Ceilings

(In Housing Units with High Ceilings)

Yes......................................................... 17.1 0.6 0.5 0.4 0.8 1.8 4.1 5.6 3.3

No........................................................... 10.1 2.7 0.5 0.7 0.5 0.8 1.5 2.2 1.2

Type of Glass in Windows

Single-pane Glass...................................... 50.7 7.7 3.7 6.7 7.5 9.7 8.3 4.9 2.3

Double-pane Glass

Without Low-e Coating............................ 50.6 5.8 3.2 4.7 4.3 7.5 9.0 10.9 5.3

With Low-e Coating................................ 8.0 0.9 0.4 0.8 0.6 1.4 1.0 1.4 1.5

Triple-pane Glass

Without Low-e Coating............................ 1.0 QQQQQQQQ

With Low-e Coating................................ 0.3 Q N Q Q Q N Q Q

Proportion of Original Windows Replaced

All............................................................... 22.4 4.6 2.9 3.9 3.4 4.1 2.3 0.7 0.5

Some.......................................................... 21.6 5.0 1.6 3.4 2.8 3.7 3.2 1.6 0.4

None........................................................... 62.3 4.5 2.9 4.7 5.9 9.7 11.9 14.5 8.2

Don't Know................................................. 4.7 0.6 Q 0.5 0.4 1.4 1.1 0.6 Q

Thermostats

Do Not Have a Thermostat........................... 15.3 2.8 1.7 2.3 2.3 2.8 1.8 1.0 0.6

Have a Thermostat....................................... 95.8 11.9 5.7 10.3 10.2 16.1 16.7 16.4 8.6

1................................................................. 84.5 10.3 5.3 9.5 8.8 14.6 14.7 14.1 7.2

2 or More.................................................... 11.3 1.5 0.4 0.8 1.3 1.5 2.1 2.3 1.5

Have a Programmable Thermostat

Yes......................................................... 33.1 3.4 2.1 3.3 3.1 5.1 6.0 5.7 4.4

No........................................................... 62.7 8.4 3.6 7.0 7.0 10.9 10.7 10.7 4.3

Use of Programable Thermostats

Reduces Temperature During Day

Yes......................................................... 18.6 2.1 1.1 2.0 1.7 2.6 3.7 3.2 2.3

No........................................................... 14.5 1.3 1.0 1.3 1.4 2.6 2.3 2.5 2.1

Reduces Temperature at Night

Yes......................................................... 21.5 2.3 1.2 2.1 2.1 3.3 4.2 3.7 2.6

No........................................................... 11.6 1.1 0.8 1.1 1.1 1.9 1.8 2.0 1.8

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
1990 to 

1999

2000 to 

Space Heating Usage Indicators 2005

 Million U.S. Housing Units

Table HC5.5 Space Heating Usage Indicators by Year of Construction, 2005

Year of Construction

Housing 

Units 

(millions)

Before 

1940

1940 to 

1949

1950 to 

1959

1960 to 

1969

1970 to 

1979

1980 to 

1989

Winter 2005 Temperature Settings

Lower Temperature Settings

Daytime When No One is at Home

Yes......................................................... 40.5 5.9 2.5 4.4 4.1 7.0 6.9 6.4 3.4

No........................................................... 59.1 7.5 3.9 7.0 6.5 9.7 9.9 9.5 5.2

Unknown................................................. 11.4 1.3 1.1 1.1 1.9 2.3 1.8 1.5 0.6

During Sleeping Hours

Yes......................................................... 40.7 5.9 2.5 4.7 4.1 6.6 6.9 6.6 3.3

No........................................................... 60.2 7.8 4.0 6.7 6.8 10.2 10.0 9.4 5.3

Unknown................................................. 10.2 1.0 0.9 1.1 1.6 2.0 1.7 1.3 0.6

Daytime Setting When No One is at Home

Heat Turned On.......................................... 93.7 12.9 5.9 10.5 9.7 15.4 15.9 15.2 8.3

63 Degrees or Less................................. 18.9 3.5 1.3 2.3 1.9 3.4 3.1 2.4 1.1

64 to 66 Degrees.................................... 17.4 2.8 1.0 2.3 1.9 2.4 2.9 2.6 1.5

67 to 69 Degrees.................................... 17.8 2.6 1.2 1.9 1.5 3.2 2.8 2.8 1.7

70 Degrees............................................. 16.0 2.0 1.0 1.8 1.7 2.4 2.7 2.8 1.4

71 to 73 Degrees.................................... 10.2 1.0 0.4 1.0 1.4 1.7 1.8 1.8 1.1

74 Degrees or More................................ 13.5 1.0 1.0 1.2 1.2 2.2 2.6 2.7 1.6

Don't Know/No Answer........................... 7.4 1.1 0.8 0.7 1.1 1.3 1.0 0.9 0.5

Do Not Use Space Heating..................... 1.3 N Q Q 0.2 0.4 0.3 0.2 Q

Heat Turned Off.......................................... 8.7 0.7 0.7 1.2 1.4 1.8 1.4 1.1 0.4

Daytime Setting When Someone is at Home

Heat Turned On.......................................... 101.5 13.7 6.6 11.6 10.9 17.0 17.0 16.1 8.7

63 Degrees or Less................................. 4.1 1.2 Q 0.7 0.3 0.7 0.4 0.3 Q

64 to 66 Degrees.................................... 8.2 1.5 0.6 1.3 1.0 1.2 1.3 0.9 0.4

67 to 69 Degrees.................................... 23.6 4.0 1.4 2.7 2.2 4.0 3.7 3.6 2.1

70 Degrees............................................. 24.6 3.2 1.6 2.6 2.7 4.0 4.0 4.4 2.0

71 to 73 Degrees.................................... 17.6 1.9 1.0 1.8 2.2 3.0 3.1 2.9 1.7

74 Degrees or More................................ 23.2 1.9 1.8 2.4 2.4 4.1 4.4 3.9 2.3

Don't Know/No Answer........................... 6.0 0.8 0.5 0.8 1.0 1.0 0.8 0.8 0.4

Do Not Use Space Heating..................... 1.3 N Q Q 0.2 0.4 0.3 0.2 Q

Heat Turned Off.......................................... 2.3 Q Q Q 0.4 0.5 0.5 Q Q

Setting During Sleeping Hours

Heat Turned On.......................................... 98.1 13.5 6.2 10.9 10.5 16.2 16.4 15.8 8.6

63 Degrees or Less................................. 13.0 2.8 0.9 1.6 1.2 2.1 2.3 1.5 0.6

64 to 66 Degrees.................................... 18.4 2.8 1.1 2.7 2.0 2.7 2.7 3.0 1.5

67 to 69 Degrees.................................... 20.8 3.1 1.3 2.3 1.9 3.8 2.9 3.7 1.9

70 Degrees............................................. 18.5 2.6 1.2 1.8 2.1 3.3 3.2 2.8 1.6

71 to 73 Degrees.................................... 11.1 1.0 0.5 1.1 1.4 1.8 2.2 2.1 1.1

74 Degrees or More................................ 16.3 1.3 1.2 1.5 1.9 2.6 3.1 2.8 1.8

Don't Know/No Answer........................... 6.4 0.8 0.6 0.8 0.9 1.1 0.9 0.7 0.4

Do Not Use Space Heating..................... 1.3 N Q Q 0.2 0.4 0.3 0.2 Q

Heat Turned Off.......................................... 5.4 0.4 0.6 0.7 0.8 1.1 1.0 0.6 Q

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
1990 to 

1999

2000 to 

Space Heating Usage Indicators 2005

 Million U.S. Housing Units

Table HC5.5 Space Heating Usage Indicators by Year of Construction, 2005

Year of Construction

Housing 

Units 

(millions)

Before 

1940

1940 to 

1949

1950 to 

1959

1960 to 

1969

1970 to 

1979

1980 to 

1989

Secondary Heating

Use Any Secondary Heating Equipment

Yes............................................................. 34.9 5.1 2.5 3.5 3.9 5.5 5.9 5.8 2.5

No.............................................................. 74.9 9.6 4.8 8.9 8.3 13.0 12.4 11.3 6.6

Proportion of Heat Provided by

Secondary Heating Equipment

Close to One-Half................................... 4.4 0.5 0.4 0.5 0.7 0.7 0.7 0.7 Q

About One-Quarter................................. 5.8 1.0 0.4 0.6 0.6 0.9 1.0 0.9 0.4

Very Little or None.................................. 24.7 3.6 1.8 2.4 2.6 3.9 4.2 4.3 1.9

Type of Supplemental Heating Equipment Used

Heat Pump................................................. 0.6 Q Q N QQQQQ

Central Warm-Air Furnace.......................... 2.3 0.3 Q Q 0.3 0.4 0.4 0.4 Q

Steam/Hot Water System........................... Q Q Q N Q N N Q N

Built-in Electric Units.................................. 2.2 0.4 Q 0.3 Q 0.3 0.3 0.3 Q

Built-in Pipeless Furnace............................ 0.3 Q N Q Q Q N Q Q

Built-in Room Heaters................................ 1.4 0.3 Q Q Q 0.3 0.3 Q Q

Heating Stove............................................. 2.1 0.3 Q 0.3 Q 0.4 0.4 0.3 Q

Portable Electric Heaters............................ 14.3 2.6 1.4 1.7 1.9 2.3 1.9 1.6 0.8

Portable Kerosene Heaters........................ 0.6 QQQQQQQQ

Cooking Stove............................................ 0.5 Q N QQQQQQ

Fireplace.................................................... 10.5 0.9 0.4 0.6 0.8 1.4 2.2 3.0 1.2

Fireplace Fuel

Wood...................................................... 6.9 0.7 0.3 0.4 0.6 1.2 1.4 1.7 0.5

Natural Gas............................................ 2.7 Q Q Q Q Q 0.6 0.9 0.5

Propane.................................................. 0.9 Q N Q N Q Q 0.3 Q

Use of Gas Fireplace

During Winter Months

Most Days........................................... 1.2 Q Q Q Q Q Q 0.5 0.2

About Once a Week............................ 1.3 Q Q Q Q Q Q 0.4 0.4

Less than 4 Times each Month........... 1.1 Q N Q Q Q 0.3 0.3 Q

Humidifier Use Each Year

Use a Humidifier............................................ 14.2 1.9 1.0 1.6 1.2 2.1 2.2 2.8 1.5

1 to 3 Months Each Year............................ 7.1 1.0 0.5 0.7 0.7 1.0 1.2 1.4 0.7

4 to 6 Months Each Year............................ 5.6 0.7 0.4 0.7 0.4 0.8 0.8 1.1 0.6

7 to 9 Months Each Year............................ 0.4 QQQQQQQQ

10 to 11 months.......................................... Q Q N N Q N Q Q N

Turned on All Year Long............................. 1.1 Q Q Q Q 0.3 Q 0.2 Q

Do Not Use a Humidifier................................ 96.9 12.8 6.4 10.9 11.2 16.8 16.4 14.6 7.8

 Q = Data withheld either because the Relative Standard Error (RSE) was greater than 50 percent or fewer than 10 households were sampled.

 N = No cases in reporting sample.

 Notes: ● Because of rounding, data may not sum to totals. ● See Glossary for definition of terms used in these tables.

 Source: Energy Information Administration, Office of Energy Markets and End Use, Forms EIA-457 A, B, C of the 2005 

Residential Energy Consumption Survey.

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Table HC6.5 Space Heating Usage Indicators by Number of Household Members, 2005

Total U.S. Housing Units.................................. 111.1 30.0 34.8 18.4 15.9 12.0

Do Not Have Heating Equpment...................... 1.2 0.3 0.3 Q 0.2 0.2

Have Space Heating Equpment........................ 109.8 29.7 34.5 18.2 15.6 11.8

Use Space Heating Equpment........................ 109.1 29.5 34.4 18.1 15.5 11.6

Have But Do Not Use Equipment.................... 0.8 QQQQQ

Space Heating Usage During 2005

Heated Floorspace (Square Feet)

None............................................................ 3.6 1.0 0.8 0.5 0.5 0.7

1 to 499........................................................ 6.1 3.0 1.6 0.6 0.6 0.3

500 to 999.................................................... 27.7 11.6 8.3 3.6 2.7 1.6

1,000 to 1,499.............................................. 26.0 7.0 8.0 4.6 3.7 2.7

1,500 to 1,999.............................................. 17.6 3.5 5.5 3.3 2.8 2.4

2,000 to 2,499.............................................. 10.7 1.5 4.0 2.0 2.0 1.2

2,500 to 2,999.............................................. 7.7 1.0 2.7 1.6 1.1 1.4

3,000 to 3,499.............................................. 3.8 0.7 1.4 0.7 0.6 0.4

3,500 to 3,999.............................................. 2.6 0.4 0.7 0.4 0.7 0.4

4,000 or More.............................................. 5.2 0.5 1.7 1.1 1.1 0.8

Total Number of Rooms

(Excluding Bathrooms)

0.................................................................. 2.1 0.6 0.5 Q 0.3 0.5

1 or 2........................................................... 3.1 2.1 0.7 Q Q Q

3.................................................................. 8.3 5.0 2.0 0.8 0.4 Q

4.................................................................. 16.6 6.1 5.0 2.4 1.9 1.1

5.................................................................. 23.3 6.3 7.2 4.4 3.2 2.2

6.................................................................. 22.6 5.1 7.7 3.5 3.4 2.8

7.................................................................. 16.3 2.8 5.5 3.1 3.2 1.7

8.................................................................. 9.7 1.3 3.5 1.8 1.6 1.5

9 or More..................................................... 9.1 0.8 2.8 2.0 1.7 1.9

At Home Behavior

Home Used for Business

Yes........................................................... 8.9 1.3 3.3 1.7 1.5 1.0

No............................................................ 102.2 28.7 31.5 16.7 14.4 10.9

Someone Home All Day

Yes........................................................... 56.4 12.9 18.7 9.0 8.0 7.9

No............................................................ 54.7 17.1 16.1 9.4 7.9 4.1

Housing Unit Characteristics Affecting Usage

Adequacy of Insulation

Well Insulated.............................................. 42.8 11.4 14.6 6.9 5.9 4.0

Adequately Insulated................................... 46.3 12.3 14.8 7.4 6.7 5.1

Poorly Insulated........................................... 19.0 5.3 4.7 3.6 2.8 2.5

No Insulation................................................ 1.4 0.3 0.4 0.3 0.2 Q

Don't Know.................................................. 1.7 0.8 0.3 Q 0.2 0.3

Home is Too Drafty During the Winter

Never........................................................... 62.9 18.4 21.7 8.9 7.9 5.9

Some of the Time........................................ 32.4 7.6 9.1 6.3 5.3 4.0

Most of the Time.......................................... 6.1 1.4 1.3 1.3 1.2 0.8

All of the Time.............................................. 5.6 1.4 1.5 1.2 0.9 0.6

Don't Know.................................................. 4.1 1.2 1.1 0.6 0.5 0.6

Number of Households With --

Housing 

Units 

(millions)

1

 Member

2

 Members

3

 Members

4

 Members

5 or More 

Space Heating Usage Indicators Members

 Million U.S. Housing Units

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Table HC6.5 Space Heating Usage Indicators by Number of Household Members, 2005

Number of Households With --

Housing 

Units 

(millions)

1

 Member

2

 Members

3

 Members

4

 Members

5 or More 

Space Heating Usage Indicators Members

 Million U.S. Housing Units

Unusually High Ceilings

Yes.............................................................. 27.2 5.3 9.0 5.0 4.8 3.2

No................................................................ 76.9 22.4 24.2 12.2 10.0 8.1

Not Asked (Mobile Homes).......................... 6.9 2.4 1.7 1.2 1.0 0.7

Cathedral Ceilings

(In Housing Units with High Ceilings)

Yes........................................................... 17.1 3.0 5.6 3.2 3.1 2.2

No............................................................ 10.1 2.3 3.4 1.8 1.8 0.9

Type of Glass in Windows

Single-pane Glass....................................... 50.7 16.1 14.7 8.0 6.5 5.3

Double-pane Glass

Without Low-e Coating............................. 50.6 12.0 16.1 8.5 8.3 5.8

With Low-e Coating.................................. 8.0 1.4 3.5 1.4 0.8 0.9

Triple-pane Glass

Without Low-e Coating............................. 1.0 Q 0.4 Q Q Q

With Low-e Coating.................................. 0.3 QQQQQ

Proportion of Original Windows Replaced

All................................................................ 22.4 6.1 7.5 3.5 3.0 2.4

Some........................................................... 21.6 5.0 7.0 3.8 3.1 2.6

None............................................................ 62.3 17.1 18.9 10.5 9.1 6.7

Don't Know.................................................. 4.7 1.9 1.3 0.6 0.7 0.3

Thermostats

Do Not Have a Thermostat............................ 15.3 4.6 4.1 2.7 2.1 1.8

Have a Thermostat........................................ 95.8 25.5 30.7 15.7 13.8 10.2

1.................................................................. 84.5 23.4 26.3 13.7 12.2 8.8

2 or More..................................................... 11.3 2.0 4.4 1.9 1.6 1.4

Have a Programmable Thermostat

Yes........................................................... 33.1 6.7 10.6 6.1 5.7 4.0

No............................................................ 62.7 18.8 20.0 9.5 8.1 6.2

Use of Programable Thermostats

Reduces Temperature During Day

Yes........................................................... 18.6 3.1 6.1 3.4 3.5 2.5

No............................................................ 14.5 3.5 4.5 2.8 2.2 1.5

Reduces Temperature at Night

Yes........................................................... 21.5 4.0 6.8 4.0 4.0 2.8

No............................................................ 11.6 2.7 3.9 2.2 1.7 1.2

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Table HC6.5 Space Heating Usage Indicators by Number of Household Members, 2005

Number of Households With --

Housing 

Units 

(millions)

1

 Member

2

 Members

3

 Members

4

 Members

5 or More 

Space Heating Usage Indicators Members

 Million U.S. Housing Units

Winter 2005 Temperature Settings

Lower Temperature Settings

Daytime When No One is at Home

Yes........................................................... 40.5 9.7 13.1 7.2 6.4 4.1

No............................................................ 59.1 16.6 19.2 9.2 7.8 6.4

Unknown.................................................. 11.4 3.7 2.5 2.0 1.7 1.5

During Sleeping Hours

Yes........................................................... 40.7 10.5 14.2 7.0 5.3 3.7

No............................................................ 60.2 16.2 18.4 9.6 9.1 7.0

Unknown.................................................. 10.2 3.3 2.3 1.8 1.4 1.3

Daytime Setting When No One is at Home

Heat Turned On........................................... 93.7 24.9 30.1 15.6 13.2 9.8

63 Degrees or Less.................................. 18.9 5.4 6.0 3.2 2.5 1.8

64 to 66 Degrees...................................... 17.4 5.0 5.4 3.2 2.1 1.7

67 to 69 Degrees...................................... 17.8 3.7 6.5 3.0 2.7 1.9

70 Degrees.............................................. 16.0 4.3 5.2 2.4 2.4 1.7

71 to 73 Degrees...................................... 10.2 2.9 3.3 1.6 1.6 0.9

74 Degrees or More................................. 13.5 3.8 3.8 2.2 1.9 1.8

Don't Know/No Answer............................. 7.4 2.5 1.7 1.1 1.0 1.0

Do Not Use Space Heating...................... 1.3 0.3 0.3 Q 0.3 0.2

Heat Turned Off........................................... 8.7 2.3 2.7 1.4 1.4 0.9

Daytime Setting When Someone is at Home

Heat Turned On........................................... 101.5 26.9 32.7 16.7 14.6 10.7

63 Degrees or Less.................................. 4.1 1.5 1.3 0.7 0.3 0.3

64 to 66 Degrees...................................... 8.2 2.8 2.5 1.3 0.8 0.8

67 to 69 Degrees...................................... 23.6 5.2 8.3 4.2 3.4 2.5

70 Degrees.............................................. 24.6 6.4 8.0 3.9 3.6 2.8

71 to 73 Degrees...................................... 17.6 5.0 5.8 2.8 2.7 1.3

74 Degrees or More................................. 23.2 6.0 6.7 3.8 3.6 3.0

Don't Know/No Answer............................. 6.0 2.1 1.5 1.0 0.7 0.8

Do Not Use Space Heating...................... 1.3 0.3 0.3 Q 0.3 0.2

Heat Turned Off........................................... 2.3 0.8 0.4 0.6 0.3 0.3

Setting During Sleeping Hours

Heat Turned On........................................... 98.1 26.1 31.2 16.2 14.1 10.5

63 Degrees or Less.................................. 13.0 3.9 4.7 2.0 1.4 1.0

64 to 66 Degrees...................................... 18.4 5.2 6.5 3.0 1.9 1.9

67 to 69 Degrees...................................... 20.8 5.0 7.1 3.7 3.3 1.7

70 Degrees.............................................. 18.5 5.0 5.2 2.9 3.0 2.3

71 to 73 Degrees...................................... 11.1 2.8 3.5 1.9 1.8 1.1

74 Degrees or More................................. 16.3 4.1 4.3 2.7 2.7 2.5

Don't Know/No Answer............................. 6.4 2.1 1.5 1.1 0.8 0.8

Do Not Use Space Heating...................... 1.3 0.3 0.3 Q 0.3 0.2

Heat Turned Off........................................... 5.4 1.5 1.8 0.9 0.7 0.5

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Table HC6.5 Space Heating Usage Indicators by Number of Household Members, 2005

Number of Households With --

Housing 

Units 

(millions)

1

 Member

2

 Members

3

 Members

4

 Members

5 or More 

Space Heating Usage Indicators Members

 Million U.S. Housing Units

Secondary Heating

Use Any Secondary Heating Equipment

Yes.............................................................. 34.9 7.5 12.4 6.8 5.1 3.2

No................................................................ 74.9 22.2 22.1 11.4 10.5 8.6

Proportion of Heat Provided by

Secondary Heating Equipment

Close to One-Half..................................... 4.4 0.9 1.4 1.0 0.5 0.5

About One-Quarter................................... 5.8 1.4 1.8 1.2 0.8 0.6

Very Little or None................................... 24.7 5.2 9.1 4.5 3.7 2.1

Type of Supplemental Heating Equipment Used

Heat Pump................................................... 0.6 QQQQQ

Central Warm-Air Furnace........................... 2.3 0.4 0.7 0.5 0.4 0.3

Steam/Hot Water System............................ Q N Q N Q N

Built-in Electric Units.................................... 2.2 0.4 0.9 0.4 0.3 Q

Built-in Pipeless Furnace............................. 0.3 QQQQQ

Built-in Room Heaters.................................. 1.4 0.4 0.6 Q Q Q

Heating Stove.............................................. 2.1 0.4 0.8 0.5 0.3 Q

Portable Electric Heaters............................. 14.3 3.6 4.5 2.7 2.0 1.5

Portable Kerosene Heaters.......................... 0.6 QQQQQ

Cooking Stove............................................. 0.5 QQQQQ

Fireplace...................................................... 10.5 1.7 4.1 2.1 1.7 0.8

Fireplace Fuel

Wood....................................................... 6.9 1.2 2.5 1.5 1.2 0.5

Natural Gas.............................................. 2.7 0.4 1.2 0.5 0.3 0.3

Propane................................................... 0.9 Q 0.4 Q Q Q

Use of Gas Fireplace

During Winter Months

Most Days............................................ 1.2 Q 0.4 Q Q Q

About Once a Week............................. 1.3 Q 0.7 0.3 Q Q

Less than 4 Times each Month............. 1.1 Q 0.5 Q Q Q

Humidifier Use Each Year

Use a Humidifier.............................................. 14.2 2.5 4.8 2.9 2.4 1.6

1 to 3 Months Each Year............................. 7.1 1.1 2.1 1.6 1.4 0.8

4 to 6 Months Each Year............................. 5.6 1.1 2.1 1.1 0.7 0.5

7 to 9 Months Each Year............................. 0.4 Q 0.3 Q N Q

10 to 11 months........................................... Q N N Q Q Q

Turned on All Year Long.............................. 1.1 Q 0.3 Q 0.3 Q

Do Not Use a Humidifier.................................. 96.9 27.5 30.0 15.5 13.4 10.4

 Q = Data withheld either because the Relative Standard Error (RSE) was greater than 50 percent or fewer than 10 households were 

sampled.

 N = No cases in reporting sample.

 Notes: ● Because of rounding, data may not sum to totals. ● See Glossary for definition of terms used in these tables.

 Source: Energy Information Administration, Office of Energy Markets and End Use, Forms EIA-457 A, B, C of the 2005 

Residential Energy Consumption Survey.

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Total U.S. Housing Units............................. 111.1 26.7 28.8 20.6 13.1 22.0 16.6 38.6

Do Not Have Heating Equpment................. 1.2 0.5 0.3 0.2 Q 0.2 0.3 0.6

Have Space Heating Equpment.................. 109.8 26.2 28.5 20.4 13.0 21.8 16.3 37.9

Use Space Heating Equpment................... 109.1 25.9 28.1 20.3 12.9 21.8 16.0 37.3

Have But Do Not Use Equipment............... 0.8 0.3 0.3 Q Q N 0.4 0.6

Space Heating Usage During 2005

Heated Floorspace (Square Feet)

None...................................................... 3.6 1.2 1.2 0.4 0.3 0.5 0.9 1.9

1 to 499.................................................. 6.1 2.9 1.7 0.8 0.3 0.5 1.7 3.5

500 to 999.............................................. 27.7 11.7 8.5 4.1 1.7 1.6 7.2 14.4

1,000 to 1,499........................................ 26.0 6.3 7.8 5.7 2.8 3.4 4.0 9.4

1,500 to 1,999........................................ 17.6 2.5 4.8 3.9 2.6 3.8 1.4 4.9

2,000 to 2,499........................................ 10.7 0.9 2.1 2.3 2.1 3.4 0.6 1.8

2,500 to 2,999........................................ 7.7 0.5 1.3 1.6 1.6 2.8 0.3 1.1

3,000 to 3,499........................................ 3.8 0.4 0.6 0.7 0.5 1.7 0.3 0.5

3,500 to 3,999........................................ 2.6 Q 0.4 Q 0.5 1.4 Q 0.2

4,000 or More......................................... 5.2 0.4 0.4 0.9 0.7 2.9 Q 0.7

Total Number of Rooms

(Excluding Bathrooms)

0............................................................. 2.1 0.6 0.8 Q Q 0.3 0.5 1.1

1 or 2...................................................... 3.1 1.7 0.7 0.3 Q Q 0.9 1.9

3............................................................. 8.3 4.3 2.5 0.8 0.3 0.4 2.4 4.8

4............................................................. 16.6 6.5 5.1 2.7 1.2 1.0 4.1 8.5

5............................................................. 23.3 6.9 7.2 4.5 2.3 2.3 4.5 9.7

6............................................................. 22.6 3.1 6.9 5.0 3.5 4.1 2.0 6.2

7............................................................. 16.3 2.3 3.1 3.9 3.0 4.1 1.4 3.6

8............................................................. 9.7 0.7 1.7 2.1 1.1 4.1 0.5 1.7

9 or More................................................ 9.1 0.5 0.9 1.1 1.3 5.4 0.3 1.0

At Home Behavior

Home Used for Business

Yes..................................................... 8.9 0.8 1.6 1.8 1.3 3.4 0.6 1.5

No....................................................... 102.2 25.9 27.2 18.8 11.8 18.5 16.1 37.1

Someone Home All Day

Yes..................................................... 56.4 16.6 15.3 9.3 6.4 8.8 10.9 24.0

No....................................................... 54.7 10.1 13.5 11.2 6.7 13.2 5.8 14.5

Housing Unit Characteristics Affecting Usage

Adequacy of Insulation

Well Insulated........................................ 42.8 9.0 11.0 8.2 5.1 9.5 4.8 13.1

Adequately Insulated.............................. 46.3 10.4 11.4 8.8 6.0 9.8 6.5 14.9

Poorly Insulated..................................... 19.0 6.0 5.5 3.3 1.8 2.4 4.5 8.7

No Insulation.......................................... 1.4 0.7 0.3 Q Q Q 0.5 0.9

Don't Know............................................. 1.7 0.7 0.6 Q Q Q 0.4 1.0

Home is Too Drafty During the Winter

Never..................................................... 62.9 14.3 16.5 11.7 7.4 13.1 8.2 20.1

Some of the Time................................... 32.4 7.6 7.7 6.4 4.2 6.5 5.0 11.2

Most of the Time.................................... 6.1 2.0 1.5 1.1 0.6 1.0 1.4 2.8

All of the Time........................................ 5.6 1.9 1.7 0.8 0.5 0.7 1.4 2.8

Don't Know............................................. 4.1 1.0 1.3 0.7 0.4 0.7 0.7 1.7

Table HC7.5 Space Heating Usage Indicators by Household Income, 2005

Space Heating Usage Indicators

Below 

Poverty 

Line

Eligible for 

Federal 

Assistance1

 Million U.S. Housing Units

2005 Household Income

Housing 

Units 

(millions)

Less than 

$20,000

$20,000 to 

$39,999

$40,000 to 

$59,999

$60,000 to 

$79,999

$80,000 or 

More

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Table HC7.5 Space Heating Usage Indicators by Household Income, 2005

Space Heating Usage Indicators

Below 

Poverty 

Line

Eligible for 

Federal 

Assistance1

 Million U.S. Housing Units

2005 Household Income

Housing 

Units 

(millions)

Less than 

$20,000

$20,000 to 

$39,999

$40,000 to 

$59,999

$60,000 to 

$79,999

$80,000 or 

More

Unusually High Ceilings

Yes......................................................... 27.2 2.3 4.9 5.2 4.5 10.3 1.4 4.2

No.......................................................... 76.9 21.4 21.4 14.6 8.2 11.4 13.3 30.5

Not Asked (Mobile Homes)..................... 6.9 3.0 2.5 0.8 0.4 0.3 1.9 3.9

Cathedral Ceilings

(In Housing Units with High Ceilings)

Yes..................................................... 17.1 0.9 2.7 3.0 2.9 7.5 0.5 2.0

No....................................................... 10.1 1.4 2.2 2.2 1.6 2.8 0.9 2.2

Type of Glass in Windows

Single-pane Glass.................................. 50.7 16.1 14.1 9.1 4.5 6.9 10.4 21.5

Double-pane Glass

Without Low-e Coating....................... 50.6 9.8 12.5 9.8 6.8 11.7 5.8 15.6

With Low-e Coating............................ 8.0 0.5 1.6 1.4 1.6 2.9 0.2 1.0

Triple-pane Glass

Without Low-e Coating....................... 1.0 Q 0.3 Q Q Q Q 0.3

With Low-e Coating............................ 0.3 N Q Q N 0.2 N Q

Proportion of Original Windows Replaced

All........................................................... 22.4 5.1 6.2 3.7 3.4 4.0 3.0 7.9

Some..................................................... 21.6 4.7 5.1 4.2 2.5 5.2 2.9 6.9

None...................................................... 62.3 15.3 16.1 11.9 6.8 12.2 9.7 21.5

Don't Know............................................. 4.7 1.6 1.4 0.8 0.3 0.6 1.0 2.2

Thermostats

Do Not Have a Thermostat...................... 15.3 6.9 4.4 1.8 1.0 1.2 4.9 9.1

Have a Thermostat................................... 95.8 19.9 24.4 18.7 12.1 20.7 11.7 29.5

1............................................................. 84.5 18.7 22.8 16.8 10.4 15.7 11.0 27.7

2 or More................................................ 11.3 1.1 1.6 1.9 1.7 5.0 0.7 1.8

Have a Programmable Thermostat

Yes..................................................... 33.1 4.2 6.5 6.5 5.5 10.4 2.6 6.7

No....................................................... 62.7 15.6 17.9 12.2 6.6 10.3 9.2 22.8

Use of Programable Thermostats

Reduces Temperature During Day

Yes..................................................... 18.6 1.9 3.3 4.0 3.1 6.2 1.2 3.2

No....................................................... 14.5 2.3 3.1 2.5 2.4 4.2 1.3 3.5

Reduces Temperature at Night

Yes..................................................... 21.5 2.4 4.0 4.3 3.6 7.2 1.5 4.0

No....................................................... 11.6 1.8 2.4 2.3 1.8 3.3 1.0 2.7

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Table HC7.5 Space Heating Usage Indicators by Household Income, 2005

Space Heating Usage Indicators

Below 

Poverty 

Line

Eligible for 

Federal 

Assistance1

 Million U.S. Housing Units

2005 Household Income

Housing 

Units 

(millions)

Less than 

$20,000

$20,000 to 

$39,999

$40,000 to 

$59,999

$60,000 to 

$79,999

$80,000 or 

More

Winter 2005 Temperature Settings

Lower Temperature Settings

Daytime When No One is at Home

Yes..................................................... 40.5 7.2 9.1 8.5 5.5 10.2 4.0 10.9

No....................................................... 59.1 15.0 16.5 10.8 6.4 10.4 9.5 21.8

Unknown............................................. 11.4 4.5 3.1 1.2 1.2 1.4 3.1 5.9

During Sleeping Hours

Yes..................................................... 40.7 7.5 9.5 8.0 5.2 10.5 4.2 10.8

No....................................................... 60.2 15.1 16.4 11.5 6.8 10.4 9.6 22.4

Unknown............................................. 10.2 4.2 2.8 1.1 1.0 1.0 2.9 5.4

Daytime Setting When No One is at Home

Heat Turned On...................................... 93.7 20.8 24.1 18.3 11.3 19.2 12.5 30.9

63 Degrees or Less............................ 18.9 4.0 4.7 3.4 2.6 4.2 2.5 6.0

64 to 66 Degrees................................ 17.4 3.1 4.5 3.6 2.1 4.1 1.9 4.7

67 to 69 Degrees................................ 17.8 2.9 4.4 4.1 2.2 4.2 1.5 4.6

70 Degrees......................................... 16.0 4.5 4.0 2.9 1.7 2.9 3.0 6.2

71 to 73 Degrees................................ 10.2 2.1 2.6 2.1 1.2 2.2 1.1 3.3

74 Degrees or More............................ 13.5 4.1 4.1 2.2 1.4 1.7 2.6 6.0

Don't Know/No Answer....................... 7.4 3.2 2.2 0.7 0.6 0.8 2.2 4.1

Do Not Use Space Heating................. 1.3 0.5 0.3 0.2 Q 0.2 0.3 0.7

Heat Turned Off..................................... 8.7 2.2 2.2 1.4 1.1 1.8 1.6 2.9

Daytime Setting When Someone is at Home

Heat Turned On...................................... 101.5 22.7 26.2 19.6 12.1 20.9 14.0 33.3

63 Degrees or Less............................ 4.1 1.0 1.3 0.8 0.5 0.5 0.8 1.6

64 to 66 Degrees................................ 8.2 2.0 2.2 1.6 0.8 1.7 1.1 3.0

67 to 69 Degrees................................ 23.6 3.2 6.0 4.9 3.1 6.4 1.8 4.9

70 Degrees......................................... 24.6 6.4 5.8 4.3 2.9 5.3 4.0 9.0

71 to 73 Degrees................................ 17.6 3.3 4.2 3.7 2.3 4.1 1.7 4.9

74 Degrees or More............................ 23.2 6.8 6.7 4.4 2.4 2.9 4.4 9.9

Don't Know/No Answer....................... 6.0 2.9 1.8 0.5 0.4 0.4 1.9 3.7

Do Not Use Space Heating................. 1.3 0.5 0.3 0.2 Q 0.2 0.3 0.7

Heat Turned Off..................................... 2.3 0.6 0.4 Q 0.5 0.4 0.5 0.8

Setting During Sleeping Hours

Heat Turned On...................................... 98.1 21.8 25.3 18.9 11.8 20.2 13.3 32.4

63 Degrees or Less............................ 13.0 2.7 3.7 2.0 1.5 3.1 1.7 4.0

64 to 66 Degrees................................ 18.4 3.8 4.0 4.0 2.4 4.3 2.0 5.1

67 to 69 Degrees................................ 20.8 3.3 5.5 4.2 2.6 5.2 1.7 5.2

70 Degrees......................................... 18.5 4.9 4.8 3.5 2.0 3.2 3.5 7.2

71 to 73 Degrees................................ 11.1 2.3 2.9 2.0 1.5 2.4 1.3 3.5

74 Degrees or More............................ 16.3 4.9 4.4 3.2 1.8 2.0 3.0 7.2

Don't Know/No Answer....................... 6.4 3.0 1.9 0.6 0.5 0.5 2.0 3.8

Do Not Use Space Heating................. 1.3 0.5 0.3 0.2 Q 0.2 0.3 0.7

Heat Turned Off..................................... 5.4 1.4 1.2 0.9 0.7 1.1 1.1 1.8

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Table HC7.5 Space Heating Usage Indicators by Household Income, 2005

Space Heating Usage Indicators

Below 

Poverty 

Line

Eligible for 

Federal 

Assistance1

 Million U.S. Housing Units

2005 Household Income

Housing 

Units 

(millions)

Less than 

$20,000

$20,000 to 

$39,999

$40,000 to 

$59,999

$60,000 to 

$79,999

$80,000 or 

More

Secondary Heating

Use Any Secondary Heating Equipment

Yes......................................................... 34.9 5.9 8.4 6.6 4.4 9.5 3.7 9.0

No.......................................................... 74.9 20.3 20.0 13.8 8.5 12.2 12.7 28.9

Proportion of Heat Provided by

Secondary Heating Equipment

Close to One-Half............................... 4.4 0.9 1.1 0.7 0.5 1.2 0.6 1.3

About One-Quarter............................. 5.8 0.9 1.4 1.0 1.2 1.5 0.8 1.4

Very Little or None.............................. 24.7 4.2 5.9 4.9 2.8 6.9 2.3 6.3

Type of Supplemental Heating Equipment Used

Heat Pump............................................. 0.6 Q Q Q Q 0.4 Q Q

Central Warm-Air Furnace..................... 2.3 0.4 0.6 0.3 0.3 0.6 0.3 0.6

Steam/Hot Water System....................... Q N Q Q N Q N Q

Built-in Electric Units.............................. 2.2 0.3 0.5 0.3 0.5 0.6 Q 0.4

Built-in Pipeless Furnace........................ 0.3 Q Q Q Q QQ Q

Built-in Room Heaters............................ 1.4 0.2 0.4 0.3 Q Q Q 0.3

Heating Stove......................................... 2.1 0.2 0.6 0.4 0.3 0.6 0.1 0.5

Portable Electric Heaters........................ 14.3 3.2 3.9 2.9 1.5 2.8 2.1 4.8

Portable Kerosene Heaters.................... 0.6 0.2 Q Q Q Q Q 0.3

Cooking Stove........................................ 0.5 0.3 Q Q N Q 0.2 0.4

Fireplace................................................ 10.5 1.0 1.9 2.0 1.5 4.1 0.4 1.5

Fireplace Fuel

Wood.................................................. 6.9 0.9 1.2 1.6 1.0 2.2 0.3 1.2

Natural Gas........................................ 2.7 Q 0.4 0.4 0.5 1.4 Q Q

Propane.............................................. 0.9 Q Q Q Q 0.5 N Q

Use of Gas Fireplace

During Winter Months

Most Days....................................... 1.2 Q Q Q Q 0.7 Q Q

About Once a Week........................ 1.3 N Q Q Q 0.8 N N

Less than 4 Times each Month....... 1.1 Q 0.3 Q Q 0.4 Q Q

Humidifier Use Each Year

Use a Humidifier........................................ 14.2 2.3 3.2 2.5 1.9 4.3 1.4 3.9

1 to 3 Months Each Year........................ 7.1 1.0 1.8 1.4 1.0 1.9 0.6 2.1

4 to 6 Months Each Year........................ 5.6 1.1 0.8 1.0 0.8 1.8 0.5 1.4

7 to 9 Months Each Year........................ 0.4 Q Q Q Q QQ Q

10 to 11 months..................................... Q N Q N N Q N Q

Turned on All Year Long......................... 1.1 Q 0.4 Q Q 0.3 Q 0.3

Do Not Use a Humidifier............................ 96.9 24.4 25.6 18.0 11.1 17.7 15.2 34.7

 Q = Data withheld either because the Relative Standard Error (RSE) was greater than 50 percent or fewer than 10 households were sampled.

 N = No cases in reporting sample.

 Notes: ● Because of rounding, data may not sum to totals. ● See Glossary for definition of terms used in these tables.

 Source: Energy Information Administration, Office of Energy Markets and End Use, Forms EIA-457 A, B, C of the 2005 

Residential Energy Consumption Survey.

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Total U.S. Housing Units........................................ 111.1 47.1 19.0 22.7 22.3

Do Not Have Heating Equpment............................ 1.2 0.7 Q 0.2 Q

Have Space Heating Equpment............................. 109.8 46.3 18.9 22.5 22.1

Use Space Heating Equpment.............................. 109.1 45.6 18.8 22.5 22.1

Have But Do Not Use Equipment.......................... 0.8 0.7 Q N N

Space Heating Usage During 2005

Heated Floorspace (Square Feet)

None................................................................. 3.6 2.4 0.3 0.4 0.4

1 to 499............................................................. 6.1 3.9 0.9 0.5 0.8

500 to 999......................................................... 27.7 14.3 5.0 4.1 4.4

1,000 to 1,499................................................... 26.0 11.8 4.5 4.5 5.2

1,500 to 1,999................................................... 17.6 6.8 3.3 3.2 4.3

2,000 to 2,499................................................... 10.7 3.1 2.1 3.2 2.3

2,500 to 2,999................................................... 7.7 2.2 1.1 2.9 1.5

3,000 to 3,499................................................... 3.8 0.9 0.6 1.3 1.0

3,500 to 3,999................................................... 2.6 0.7 0.3 0.8 0.7

4,000 or More.................................................... 5.2 1.0 0.7 1.7 1.7

Total Number of Rooms

(Excluding Bathrooms)

0........................................................................ 2.1 1.4 0.2 Q Q

1 or 2................................................................ 3.1 1.9 0.6 0.5 Q

3........................................................................ 8.3 5.2 1.2 1.0 0.9

4........................................................................ 16.6 8.5 3.2 2.1 2.9

5........................................................................ 23.3 10.1 4.3 3.8 5.1

6........................................................................ 22.6 9.5 3.6 4.1 5.3

7........................................................................ 16.3 5.5 3.1 4.0 3.7

8........................................................................ 9.7 2.8 1.2 3.2 2.4

9 or More.......................................................... 9.1 2.2 1.6 3.7 1.7

At Home Behavior

Home Used for Business

Yes................................................................ 8.9 2.5 1.3 2.4 2.7

No................................................................. 102.2 44.6 17.7 20.3 19.6

Someone Home All Day

Yes................................................................ 56.4 22.3 10.4 11.1 12.6

No................................................................. 54.7 24.9 8.6 11.5 9.7

Housing Unit Characteristics Affecting Usage

Adequacy of Insulation

Well Insulated................................................... 42.8 16.0 7.1 9.4 10.3

Adequately Insulated......................................... 46.3 20.3 8.0 9.5 8.5

Poorly Insulated................................................ 19.0 9.0 3.2 3.4 3.4

No Insulation..................................................... 1.4 0.8 0.2 0.2 Q

Don't Know........................................................ 1.7 1.0 0.5 Q Q

Home is Too Drafty During the Winter

Never................................................................ 62.9 25.7 10.6 13.1 13.6

Some of the Time............................................. 32.4 14.0 5.2 6.5 6.7

Most of the Time............................................... 6.1 3.0 1.2 1.1 0.9

All of the Time................................................... 5.6 2.7 1.0 1.0 0.9

Don't Know........................................................ 4.1 1.8 0.9 1.0 0.3

 Million U.S. Housing Units

Housing

Units 

(millions)

Table HC8.5 Space Heating Usage Indicators by Urban/Rural Location, 2005

Space Heating Usage Indicators

Urban/Rural Location

(as Self-Reported)

City Town Surburbs Rural

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
 Million U.S. Housing Units

Housing

Units 

(millions)

Table HC8.5 Space Heating Usage Indicators by Urban/Rural Location, 2005

Space Heating Usage Indicators

Urban/Rural Location

(as Self-Reported)

City Town Surburbs Rural

Unusually High Ceilings

Yes................................................................... 27.2 9.7 3.8 8.3 5.3

No..................................................................... 76.9 35.5 14.4 13.7 13.3

Not Asked (Mobile Homes)............................... 6.9 1.9 0.8 0.6 3.7

Cathedral Ceilings

(In Housing Units with High Ceilings)

Yes................................................................ 17.1 5.7 2.2 5.8 3.4

No................................................................. 10.1 4.0 1.7 2.5 1.9

Type of Glass in Windows

Single-pane Glass............................................. 50.7 25.8 8.6 7.9 8.3

Double-pane Glass

Without Low-e Coating.................................. 50.6 18.7 9.1 11.8 11.0

With Low-e Coating....................................... 8.0 2.0 1.0 2.4 2.5

Triple-pane Glass

Without Low-e Coating.................................. 1.0 0.3 Q 0.3 Q

With Low-e Coating....................................... 0.3 QQQQ

Proportion of Original Windows Replaced

All...................................................................... 22.4 9.2 4.3 4.4 4.5

Some................................................................ 21.6 8.4 3.8 4.6 4.8

None................................................................. 62.3 27.2 9.7 12.7 12.7

Don't Know........................................................ 4.7 2.3 1.1 1.0 0.4

Thermostats

Do Not Have a Thermostat................................. 15.3 7.7 2.1 1.3 4.2

Have a Thermostat.............................................. 95.8 39.5 16.8 21.3 18.2

1........................................................................ 84.5 36.3 14.9 17.8 15.4

2 or More.......................................................... 11.3 3.1 1.9 3.5 2.8

Have a Programmable Thermostat

Yes................................................................ 33.1 13.8 5.4 8.5 5.4

No................................................................. 62.7 25.7 11.4 12.8 12.8

Use of Programable Thermostats

Reduces Temperature During Day

Yes................................................................ 18.6 7.4 3.3 5.2 2.7

No................................................................. 14.5 6.4 2.1 3.3 2.7

Reduces Temperature at Night

Yes................................................................ 21.5 8.5 3.6 6.0 3.4

No................................................................. 11.6 5.3 1.8 2.6 2.0

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
 Million U.S. Housing Units

Housing

Units 

(millions)

Table HC8.5 Space Heating Usage Indicators by Urban/Rural Location, 2005

Space Heating Usage Indicators

Urban/Rural Location

(as Self-Reported)

City Town Surburbs Rural

Winter 2005 Temperature Settings

Lower Temperature Settings

Daytime When No One is at Home

Yes................................................................ 40.5 15.4 7.3 9.4 8.4

No................................................................. 59.1 25.4 9.9 11.7 12.1

Unknown....................................................... 11.4 6.4 1.7 1.5 1.9

During Sleeping Hours

Yes................................................................ 40.7 15.2 7.6 9.3 8.6

No................................................................. 60.2 26.3 10.0 11.9 12.0

Unknown....................................................... 10.2 5.7 1.4 1.4 1.7

Daytime Setting When No One is at Home

Heat Turned On................................................ 93.7 37.1 16.6 20.2 19.9

63 Degrees or Less....................................... 18.9 7.0 3.7 4.1 4.1

64 to 66 Degrees........................................... 17.4 6.7 3.3 4.0 3.4

67 to 69 Degrees........................................... 17.8 6.3 3.0 4.4 3.9

70 Degrees.................................................... 16.0 6.8 2.9 2.9 3.4

71 to 73 Degrees........................................... 10.2 4.0 1.4 2.4 2.3

74 Degrees or More....................................... 13.5 6.3 2.2 2.3 2.8

Don't Know/No Answer.................................. 7.4 3.9 1.1 1.0 1.3

Do Not Use Space Heating............................ 1.3 0.8 Q 0.2 Q

Heat Turned Off................................................ 8.7 5.2 1.2 1.3 0.9

Daytime Setting When Someone is at Home

Heat Turned On................................................ 101.5 41.8 17.5 21.5 20.7

63 Degrees or Less....................................... 4.1 1.8 0.9 0.6 0.8

64 to 66 Degrees........................................... 8.2 3.3 1.7 1.8 1.4

67 to 69 Degrees........................................... 23.6 8.2 3.9 5.9 5.6

70 Degrees.................................................... 24.6 10.3 4.1 5.2 5.0

71 to 73 Degrees........................................... 17.6 7.1 3.1 3.9 3.5

74 Degrees or More....................................... 23.2 11.1 3.8 3.9 4.5

Don't Know/No Answer.................................. 6.0 3.1 0.9 0.7 1.3

Do Not Use Space Heating............................ 1.3 0.8 Q 0.2 Q

Heat Turned Off................................................ 2.3 1.4 0.5 0.3 Q

Setting During Sleeping Hours

Heat Turned On................................................ 98.1 39.7 17.3 20.7 20.3

63 Degrees or Less....................................... 13.0 5.1 2.6 2.6 2.7

64 to 66 Degrees........................................... 18.4 6.4 3.7 4.4 4.0

67 to 69 Degrees........................................... 20.8 7.3 3.5 5.2 4.8

70 Degrees.................................................... 18.5 8.7 3.1 2.9 3.9

71 to 73 Degrees........................................... 11.1 4.6 1.7 2.6 2.2

74 Degrees or More....................................... 16.3 7.7 2.8 3.0 2.8

Don't Know/No Answer.................................. 6.4 3.3 0.9 0.9 1.3

Do Not Use Space Heating............................ 1.3 0.8 Q 0.2 Q

Heat Turned Off................................................ 5.4 3.4 0.7 0.8 0.6

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
 Million U.S. Housing Units

Housing

Units 

(millions)

Table HC8.5 Space Heating Usage Indicators by Urban/Rural Location, 2005

Space Heating Usage Indicators

Urban/Rural Location

(as Self-Reported)

City Town Surburbs Rural

Secondary Heating

Use Any Secondary Heating Equipment

Yes................................................................... 34.9 11.7 5.1 7.3 10.8

No..................................................................... 74.9 34.6 13.8 15.1 11.4

Proportion of Heat Provided by

Secondary Heating Equipment

Close to One-Half.......................................... 4.4 1.5 0.7 0.7 1.5

About One-Quarter........................................ 5.8 1.7 0.9 1.1 2.2

Very Little or None......................................... 24.7 8.6 3.5 5.5 7.1

Type of Supplemental Heating Equipment Used

Heat Pump........................................................ 0.6 QQQQ

Central Warm-Air Furnace................................ 2.3 0.5 0.5 0.4 1.0

Steam/Hot Water System................................. Q N Q Q Q

Built-in Electric Units......................................... 2.2 0.8 Q 0.5 0.7

Built-in Pipeless Furnace.................................. 0.3 QQQQ

Built-in Room Heaters....................................... 1.4 Q Q Q 0.8

Heating Stove................................................... 2.1 0.3 0.2 0.3 1.3

Portable Electric Heaters.................................. 14.3 5.7 2.5 2.8 3.3

Portable Kerosene Heaters............................... 0.6 Q Q Q 0.3

Cooking Stove................................................... 0.5 0.3 Q Q Q

Fireplace........................................................... 10.5 3.4 1.3 2.8 2.9

Fireplace Fuel

Wood............................................................. 6.9 2.4 1.0 1.4 2.1

Natural Gas................................................... 2.7 0.9 0.3 1.1 0.4

Propane......................................................... 0.9 Q Q Q 0.5

Use of Gas Fireplace

During Winter Months

Most Days.................................................. 1.2 0.4 Q 0.4 0.4

About Once a Week.................................. 1.3 0.3 Q 0.6 Q

Less than 4 Times each Month.................. 1.1 0.4 Q 0.4 0.3

Humidifier Use Each Year

Use a Humidifier................................................... 14.2 4.0 2.6 4.1 3.6

1 to 3 Months Each Year................................... 7.1 1.9 1.3 2.0 1.8

4 to 6 Months Each Year................................... 5.6 1.5 0.9 1.6 1.6

7 to 9 Months Each Year................................... 0.4 QQQQ

10 to 11 months................................................ Q Q N Q N

Turned on All Year Long................................... 1.1 0.4 Q 0.3 Q

Do Not Use a Humidifier....................................... 96.9 43.1 16.4 18.6 18.7

 Q = Data withheld either because the Relative Standard Error (RSE) was greater than 50 percent or fewer than 10 households

were sampled.

 N = No cases in reporting sample.

 Notes: ● Because of rounding, data may not sum to totals. ● See Glossary for definition of terms used in these tables.

 Source: Energy Information Administration, Office of Energy Markets and End Use, Forms EIA-457 A, B, C of the 2005 

Residential Energy Consumption Survey.

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
 Million U.S. Housing Units

Total U.S. Housing Units........................................ 111.1 10.9 26.1 27.3 24.0 22.8

Do Not Have Heating Equpment............................ 1.2 Q Q N 0.3 0.8

Have Space Heating Equpment.............................. 109.8 10.9 26.0 27.3 23.7 22.0

Use Space Heating Equpment.............................. 109.1 10.9 26.0 27.3 23.2 21.7

Have But Do Not Use Equipment.......................... 0.8 N N Q 0.5 Q

Space Heating Usage During 2005

Heated Floorspace (Square Feet)

None.................................................................. 3.6 Q 0.5 Q 1.4 1.4

1 to 499............................................................. 6.1 0.2 1.2 1.5 1.9 1.2

500 to 999.......................................................... 27.7 2.3 6.9 6.5 6.5 5.6

1,000 to 1,499.................................................... 26.0 1.9 5.3 6.4 6.1 6.4

1,500 to 1,999.................................................... 17.6 1.9 4.0 4.5 3.3 3.9

2,000 to 2,499.................................................... 10.7 1.3 2.6 3.1 1.9 1.8

2,500 to 2,999.................................................... 7.7 1.1 2.1 1.6 1.5 1.4

3,000 to 3,499.................................................... 3.8 0.6 1.2 1.1 0.5 0.4

3,500 to 3,999.................................................... 2.6 0.6 0.9 0.7 Q Q

4,000 or More.................................................... 5.2 1.0 1.3 1.7 0.6 0.6

Total Number of Rooms

(Excluding Bathrooms)

0........................................................................ 2.1 Q 0.5 Q 0.9 0.4

1 or 2................................................................. 3.1 0.2 0.9 0.8 0.5 0.6

3........................................................................ 8.3 0.5 1.9 2.2 1.9 1.8

4........................................................................ 16.6 1.6 3.6 4.2 3.4 3.7

5........................................................................ 23.3 2.0 5.6 5.4 5.2 5.0

6........................................................................ 22.6 2.4 4.7 5.3 5.1 5.0

7........................................................................ 16.3 1.7 3.7 4.1 3.5 3.3

8........................................................................ 9.7 1.2 2.4 2.7 1.8 1.7

9 or More........................................................... 9.1 1.2 2.7 2.4 1.5 1.3

At Home Behavior

Home Used for Business

Yes................................................................ 8.9 1.5 1.5 2.1 1.9 1.9

No.................................................................. 102.2 9.5 24.6 25.2 22.0 20.9

Someone Home All Day

Yes................................................................ 56.4 5.0 13.3 13.8 12.4 12.0

No.................................................................. 54.7 6.0 12.8 13.6 11.6 10.8

Housing Unit Characteristics Affecting Usage

Adequacy of Insulation

Well Insulated.................................................... 42.8 5.0 10.2 10.9 8.7 8.1

Adequately Insulated......................................... 46.3 4.3 10.8 11.0 10.2 10.0

Poorly Insulated................................................. 19.0 1.5 4.3 4.8 4.5 3.9

No Insulation...................................................... 1.4 Q 0.2 Q 0.4 0.5

Don't Know........................................................ 1.7 Q 0.5 0.4 Q 0.4

Home is Too Drafty During the Winter

Never................................................................. 62.9 6.0 13.3 14.5 13.7 15.5

Some of the Time.............................................. 32.4 3.4 7.9 8.8 7.4 4.8

Most of the Time................................................ 6.1 0.7 1.7 1.6 1.3 0.8

All of the Time................................................... 5.6 0.2 2.0 1.6 1.2 0.7

Don't Know........................................................ 4.1 0.5 1.1 0.9 0.5 1.0

Housing 

Units 

(millions)

Climate Zone1

Table HC9.5 Space Heating Usage Indicators by Climate Zone, 2005

2,000 CDD 

or More

and Less 

than 4,000 

Space Heating Usage Indicators HDD

Less than 2,000 CDD and --

Greater than 

7,000 HDD

5,500 to 

7,000 HDD

4,000 to 

5,499 HDD

Less than 

4,000 HDD

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
 Million U.S. Housing Units

Housing 

Units 

(millions)

Climate Zone1

Table HC9.5 Space Heating Usage Indicators by Climate Zone, 2005

2,000 CDD 

or More

and Less 

than 4,000 

Space Heating Usage Indicators HDD

Less than 2,000 CDD and --

Greater than 

7,000 HDD

5,500 to 

7,000 HDD

4,000 to 

5,499 HDD

Less than 

4,000 HDD

Unusually High Ceilings

Yes.................................................................... 27.2 3.0 5.6 5.6 6.4 6.7

No...................................................................... 76.9 7.3 19.3 20.4 15.8 14.2

Not Asked (Mobile Homes)................................ 6.9 0.7 1.2 1.3 1.8 2.0

Cathedral Ceilings

(In Housing Units with High Ceilings)

Yes................................................................ 17.1 2.2 3.3 3.2 4.1 4.4

No.................................................................. 10.1 0.8 2.3 2.4 2.3 2.3

Type of Glass in Windows

Single-pane Glass............................................. 50.7 3.1 9.1 9.5 13.7 15.2

Double-pane Glass

Without Low-e Coating................................... 50.6 5.9 14.0 15.7 8.8 6.3

With Low-e Coating........................................ 8.0 1.7 2.3 1.7 1.3 1.0

Triple-pane Glass

Without Low-e Coating................................... 1.0 Q 0.4 Q Q Q

With Low-e Coating........................................ 0.3 Q Q Q Q Q

Proportion of Original Windows Replaced

All...................................................................... 22.4 2.4 7.0 7.0 4.0 2.0

Some................................................................. 21.6 2.7 5.5 5.6 4.0 3.8

None.................................................................. 62.3 5.4 12.4 13.4 15.0 16.0

Don't Know........................................................ 4.7 0.4 1.2 1.2 0.9 1.0

Thermostats

Do Not Have a Thermostat.................................. 15.3 0.7 2.6 4.3 3.8 3.8

Have a Thermostat.............................................. 95.8 10.2 23.4 23.0 20.1 19.0

1........................................................................ 84.5 8.4 20.4 19.9 18.3 17.5

2 or More........................................................... 11.3 1.8 3.1 3.1 1.9 1.5

Have a Programmable Thermostat

Yes................................................................ 33.1 3.3 8.3 7.2 8.3 6.0

No.................................................................. 62.7 6.9 15.2 15.8 11.8 13.0

Use of Programable Thermostats

Reduces Temperature During Day

Yes................................................................ 18.6 2.0 5.1 4.0 4.3 3.1

No.................................................................. 14.5 1.3 3.2 3.2 4.1 2.9

Reduces Temperature at Night

Yes................................................................ 21.5 2.2 5.6 4.7 5.2 3.7

No.................................................................. 11.6 1.1 2.7 2.5 3.1 2.2

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
 Million U.S. Housing Units

Housing 

Units 

(millions)

Climate Zone1

Table HC9.5 Space Heating Usage Indicators by Climate Zone, 2005

2,000 CDD 

or More

and Less 

than 4,000 

Space Heating Usage Indicators HDD

Less than 2,000 CDD and --

Greater than 

7,000 HDD

5,500 to 

7,000 HDD

4,000 to 

5,499 HDD

Less than 

4,000 HDD

Winter 2005 Temperature Settings

Lower Temperature Settings

Daytime When No One is at Home

Yes................................................................ 40.5 6.0 11.7 10.0 6.8 5.9

No.................................................................. 59.1 4.6 13.2 15.3 13.0 13.1

Unknown........................................................ 11.4 0.3 1.2 2.0 4.2 3.8

During Sleeping Hours

Yes................................................................ 40.7 6.1 11.0 9.9 7.9 5.9

No.................................................................. 60.2 4.6 14.1 15.7 12.7 13.1

Unknown........................................................ 10.2 0.3 1.0 1.7 3.4 3.7

Daytime Setting When No One is at Home

Heat Turned On................................................. 93.7 10.6 24.7 25.0 16.1 17.4

63 Degrees or Less........................................ 18.9 3.3 5.8 4.8 3.1 2.0

64 to 66 Degrees............................................ 17.4 2.6 4.9 4.8 2.7 2.3

67 to 69 Degrees............................................ 17.8 2.2 5.6 4.7 3.0 2.3

70 Degrees.................................................... 16.0 1.4 4.0 5.4 2.7 2.5

71 to 73 Degrees............................................ 10.2 0.8 2.2 3.0 1.9 2.3

74 Degrees or More....................................... 13.5 0.3 2.1 2.4 2.7 5.9

Don't Know/No Answer................................... 7.4 Q 1.0 1.9 2.4 1.8

Do Not Use Space Heating............................ 1.3 Q Q N 0.3 0.8

Heat Turned Off................................................. 8.7 Q 0.3 0.4 5.2 2.8

Daytime Setting When Someone is at Home

Heat Turned On................................................. 101.5 10.7 25.1 25.6 21.0 19.1

63 Degrees or Less........................................ 4.1 0.4 1.2 1.4 0.8 0.3

64 to 66 Degrees............................................ 8.2 1.5 2.1 2.5 1.3 0.8

67 to 69 Degrees............................................ 23.6 3.5 7.7 5.4 4.5 2.6

70 Degrees.................................................... 24.6 2.8 6.5 6.8 5.1 3.4

71 to 73 Degrees............................................ 17.6 1.7 3.9 5.3 3.4 3.3

74 Degrees or More....................................... 23.2 0.9 3.6 4.2 5.8 8.7

Don't Know/No Answer................................... 6.0 Q 0.8 1.6 1.6 1.8

Do Not Use Space Heating............................ 1.3 Q Q N 0.3 0.8

Heat Turned Off................................................. 2.3 N Q Q 1.2 1.0

Setting During Sleeping Hours

Heat Turned On................................................. 98.1 10.7 24.9 25.5 18.6 18.5

63 Degrees or Less........................................ 13.0 2.5 3.8 3.3 2.6 0.9

64 to 66 Degrees............................................ 18.4 3.1 5.3 4.8 2.8 2.4

67 to 69 Degrees............................................ 20.8 2.7 6.4 5.2 3.8 2.6

70 Degrees.................................................... 18.5 1.3 4.3 5.7 3.7 3.5

71 to 73 Degrees............................................ 11.1 0.6 2.5 3.3 2.1 2.5

74 Degrees or More....................................... 16.3 0.5 2.6 3.1 3.6 6.5

Don't Know/No Answer................................... 6.4 Q 0.9 1.7 1.8 1.8

Do Not Use Space Heating............................ 1.3 Q Q N 0.3 0.8

Heat Turned Off................................................. 5.4 N Q Q 3.3 1.7

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
 Million U.S. Housing Units

Housing 

Units 

(millions)

Climate Zone1

Table HC9.5 Space Heating Usage Indicators by Climate Zone, 2005

2,000 CDD 

or More

and Less 

than 4,000 

Space Heating Usage Indicators HDD

Less than 2,000 CDD and --

Greater than 

7,000 HDD

5,500 to 

7,000 HDD

4,000 to 

5,499 HDD

Less than 

4,000 HDD

Secondary Heating

Use Any Secondary Heating Equipment

Yes.................................................................... 34.9 4.6 8.0 8.7 8.8 4.9

No...................................................................... 74.9 6.3 18.0 18.6 14.9 17.0

Proportion of Heat Provided by

Secondary Heating Equipment

Close to One-Half........................................... 4.4 0.5 1.1 1.1 1.2 0.5

About One-Quarter......................................... 5.8 0.9 1.3 1.4 1.5 0.8

Very Little or None......................................... 24.7 3.2 5.7 6.2 6.0 3.6

Type of Supplemental Heating Equipment Used

Heat Pump........................................................ 0.6 Q Q 0.3 Q Q

Central Warm-Air Furnace................................. 2.3 0.4 0.4 0.7 0.6 0.3

Steam/Hot Water System.................................. QQQQ NN

Built-in Electric Units.......................................... 2.2 0.6 0.6 0.5 0.3 Q

Built-in Pipeless Furnace................................... 0.3 Q Q Q Q Q

Built-in Room Heaters........................................ 1.4 0.2 0.5 Q Q Q

Heating Stove.................................................... 2.1 0.5 0.7 0.4 0.3 Q

Portable Electric Heaters................................... 14.3 1.0 3.7 3.6 3.8 2.2

Portable Kerosene Heaters................................ 0.6 Q Q Q Q N

Cooking Stove................................................... 0.5 Q Q Q Q Q

Fireplace............................................................ 10.5 1.5 1.9 2.4 2.9 1.8

Fireplace Fuel

Wood............................................................. 6.9 1.0 1.0 1.6 2.0 1.4

Natural Gas.................................................... 2.7 0.5 0.7 0.4 0.8 0.3

Propane......................................................... 0.9 Q Q 0.3 Q Q

Use of Gas Fireplace

During Winter Months

Most Days.................................................. 1.2 0.2 Q Q 0.4 Q

About Once a Week................................... 1.3 Q 0.4 0.3 Q Q

Less than 4 Times each Month................... 1.1 Q 0.3 Q 0.3 Q

Humidifier Use Each Year

Use a Humidifier.................................................... 14.2 2.6 5.2 3.9 1.6 0.9

1 to 3 Months Each Year................................... 7.1 1.3 2.4 1.9 0.9 0.6

4 to 6 Months Each Year................................... 5.6 1.1 2.4 1.5 0.4 Q

7 to 9 Months Each Year................................... 0.4 Q Q Q N Q

10 to 11 months................................................. Q N Q Q N Q

Turned on All Year Long.................................... 1.1 Q 0.2 0.4 0.2 Q

Do Not Use a Humidifier........................................ 96.9 8.3 20.8 23.4 22.4 22.0

 1. One of five climatically distinct areas, determined according to the 30-year average (1971-2000) of the annual heating and cooling 

degree-days. A household is assigned to a climate zone according to the 30-year average annual degree-days for an appropriate nearby 

weather station.

 Q = Data withheld either because the Relative Standard Error (RSE) was greater than 50 percent or fewer than 10 households were 

sampled.

 N = No cases in reporting sample.

 Notes: ● Because of rounding, data may not sum to totals. ● See Glossary for definition of terms used in these tables.

 Source: Energy Information Administration, Office of Energy Markets and End Use, Forms EIA-457 A, B, C of the 2005 

Residential Energy Consumption Survey.

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Total U.S. Housing Units........................................ 111.1 20.6 25.6 40.7 24.2

Do Not Have Heating Equpment............................ 1.2 Q Q Q 0.7

Have Space Heating Equpment............................. 109.8 20.5 25.6 40.3 23.4

Use Space Heating Equpment.............................. 109.1 20.5 25.6 40.1 22.9

Have But Do Not Use Equipment.......................... 0.8 N N Q 0.6

Space Heating Usage During 2005

Heated Floorspace (Square Feet)

None................................................................. 3.6 Q 0.5 0.8 2.1

1 to 499............................................................. 6.1 1.3 0.9 1.9 2.1

500 to 999......................................................... 27.7 5.6 5.7 10.5 6.0

1,000 to 1,499................................................... 26.0 4.3 5.2 11.3 5.2

1,500 to 1,999................................................... 17.6 3.0 3.9 6.8 3.9

2,000 to 2,499................................................... 10.7 2.2 2.8 3.7 2.0

2,500 to 2,999................................................... 7.7 1.6 2.2 2.3 1.6

3,000 to 3,499................................................... 3.8 0.8 1.5 1.0 0.4

3,500 to 3,999................................................... 2.6 0.6 1.1 0.6 0.3

4,000 or More.................................................... 5.2 1.0 1.9 1.7 0.6

Total Number of Rooms

(Excluding Bathrooms)

0........................................................................ 2.1 Q 0.5 0.3 1.1

1 or 2................................................................ 3.1 0.9 0.8 0.6 0.8

3........................................................................ 8.3 1.9 1.3 3.2 1.9

4........................................................................ 16.6 3.3 3.2 6.5 3.5

5........................................................................ 23.3 3.8 5.5 9.1 5.0

6........................................................................ 22.6 3.8 5.2 8.8 4.8

7........................................................................ 16.3 2.9 3.8 6.0 3.6

8........................................................................ 9.7 1.8 2.6 3.3 2.0

9 or More.......................................................... 9.1 2.1 2.6 2.9 1.5

At Home Behavior

Home Used for Business

Yes................................................................ 8.9 1.2 2.0 3.0 2.6

No................................................................. 102.2 19.3 23.6 37.7 21.6

Someone Home All Day

Yes................................................................ 56.4 10.8 12.7 19.8 13.0

No................................................................. 54.7 9.8 12.9 20.9 11.2

Housing Unit Characteristics Affecting Usage

Adequacy of Insulation

Well Insulated................................................... 42.8 8.2 10.6 16.1 7.9

Adequately Insulated......................................... 46.3 8.1 10.6 17.0 10.6

Poorly Insulated................................................ 19.0 3.7 3.7 6.8 4.9

No Insulation..................................................... 1.4 Q Q 0.3 0.6

Don't Know........................................................ 1.7 0.5 0.5 0.5 0.2

Home is Too Drafty During the Winter

Never................................................................ 62.9 10.2 14.1 25.8 12.9

Some of the Time............................................. 32.4 7.2 7.0 10.4 7.8

Most of the Time............................................... 6.1 1.4 1.5 1.7 1.5

All of the Time................................................... 5.6 1.0 1.7 1.5 1.4

Don't Know........................................................ 4.1 0.8 1.3 1.3 0.7

Housing

Units 

(millions)

 Million U.S. Housing Units

Table HC10.5 Space Heating Usage Indicators by U.S. Census Region, 2005

Space Heating Usage Indicators

U.S. Census Region

Northeast Midwest South West

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Housing

Units 

(millions)

 Million U.S. Housing Units

Table HC10.5 Space Heating Usage Indicators by U.S. Census Region, 2005

Space Heating Usage Indicators

U.S. Census Region

Northeast Midwest South West

Unusually High Ceilings

Yes................................................................... 27.2 3.8 6.1 9.9 7.5

No..................................................................... 76.9 16.4 18.8 27.0 14.8

Not Asked (Mobile Homes)............................... 6.9 0.4 0.8 3.8 2.0

Cathedral Ceilings

(In Housing Units with High Ceilings)

Yes................................................................ 17.1 2.0 3.6 6.4 5.1

No................................................................. 10.1 1.7 2.5 3.5 2.4

Type of Glass in Windows

Single-pane Glass............................................. 50.7 6.8 8.5 23.6 11.8

Double-pane Glass

Without Low-e Coating.................................. 50.6 12.1 13.6 14.9 10.1

With Low-e Coating....................................... 8.0 1.3 2.9 1.7 2.0

Triple-pane Glass

Without Low-e Coating.................................. 1.0 Q 0.5 Q Q

With Low-e Coating....................................... 0.3 QQQQ

Proportion of Original Windows Replaced

All...................................................................... 22.4 7.1 6.1 5.3 4.0

Some................................................................ 21.6 4.6 5.4 6.3 5.4

None................................................................. 62.3 8.3 13.1 27.4 13.5

Don't Know........................................................ 4.7 0.7 1.0 1.8 1.3

Thermostats

Do Not Have a Thermostat................................. 15.3 3.7 1.9 5.5 4.2

Have a Thermostat.............................................. 95.8 16.9 23.7 35.2 20.0

1........................................................................ 84.5 13.5 21.3 31.7 18.0

2 or More.......................................................... 11.3 3.4 2.5 3.5 2.0

Have a Programmable Thermostat

Yes................................................................ 33.1 5.8 8.3 9.9 9.1

No................................................................. 62.7 11.1 15.4 25.3 10.9

Use of Programable Thermostats

Reduces Temperature During Day

Yes................................................................ 18.6 3.8 4.7 5.2 4.8

No................................................................. 14.5 1.9 3.6 4.7 4.4

Reduces Temperature at Night

Yes................................................................ 21.5 4.2 5.4 6.0 5.9

No................................................................. 11.6 1.6 2.9 3.9 3.2

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Housing

Units 

(millions)

 Million U.S. Housing Units

Table HC10.5 Space Heating Usage Indicators by U.S. Census Region, 2005

Space Heating Usage Indicators

U.S. Census Region

Northeast Midwest South West

Winter 2005 Temperature Settings

Lower Temperature Settings

Daytime When No One is at Home

Yes................................................................ 40.5 8.6 11.7 11.9 8.2

No................................................................. 59.1 10.9 13.0 24.1 11.1

Unknown....................................................... 11.4 1.1 0.9 4.6 4.9

During Sleeping Hours

Yes................................................................ 40.7 9.1 11.0 11.5 9.1

No................................................................. 60.2 10.5 13.8 24.9 11.1

Unknown....................................................... 10.2 1.0 0.8 4.3 4.1

Daytime Setting When No One is at Home

Heat Turned On................................................ 93.7 19.3 24.7 34.3 15.4

63 Degrees or Less....................................... 18.9 5.3 4.7 4.3 4.6

64 to 66 Degrees........................................... 17.4 4.2 5.0 5.0 3.3

67 to 69 Degrees........................................... 17.8 3.8 5.5 5.9 2.5

70 Degrees.................................................... 16.0 3.3 4.2 6.1 2.4

71 to 73 Degrees........................................... 10.2 1.3 3.1 4.8 1.0

74 Degrees or More....................................... 13.5 1.3 2.2 8.3 1.6

Don't Know/No Answer.................................. 7.4 1.0 0.8 3.1 2.5

Do Not Use Space Heating............................ 1.3 Q Q 0.4 0.7

Heat Turned Off................................................ 8.7 Q Q 2.8 5.6

Daytime Setting When Someone is at Home

Heat Turned On................................................ 101.5 19.6 24.9 36.5 20.5

63 Degrees or Less....................................... 4.1 1.5 0.8 0.8 1.1

64 to 66 Degrees........................................... 8.2 2.4 1.9 2.0 1.9

67 to 69 Degrees........................................... 23.6 5.5 6.8 6.4 4.9

70 Degrees.................................................... 24.6 5.3 6.1 8.0 5.3

71 to 73 Degrees........................................... 17.6 2.5 5.2 7.0 3.0

74 Degrees or More....................................... 23.2 2.4 4.2 12.3 4.4

Don't Know/No Answer.................................. 6.0 0.9 0.6 2.9 1.6

Do Not Use Space Heating............................ 1.3 Q Q 0.4 0.7

Heat Turned Off................................................ 2.3 Q N 0.9 1.3

Setting During Sleeping Hours

Heat Turned On................................................ 98.1 19.5 24.8 35.9 17.9

63 Degrees or Less....................................... 13.0 3.8 2.8 2.4 4.0

64 to 66 Degrees........................................... 18.4 4.7 5.2 4.8 3.7

67 to 69 Degrees........................................... 20.8 4.2 6.8 6.5 3.2

70 Degrees.................................................... 18.5 3.6 4.3 7.4 3.3

71 to 73 Degrees........................................... 11.1 1.4 3.0 5.5 1.2

74 Degrees or More....................................... 16.3 1.8 2.8 9.3 2.5

Don't Know/No Answer.................................. 6.4 0.9 0.7 2.8 1.9

Do Not Use Space Heating............................ 1.3 Q Q 0.4 0.7

Heat Turned Off................................................ 5.4 Q N 1.6 3.7

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Housing

Units 

(millions)

 Million U.S. Housing Units

Table HC10.5 Space Heating Usage Indicators by U.S. Census Region, 2005

Space Heating Usage Indicators

U.S. Census Region

Northeast Midwest South West

Secondary Heating

Use Any Secondary Heating Equipment

Yes................................................................... 34.9 4.4 9.4 11.8 9.3

No..................................................................... 74.9 16.1 16.2 28.5 14.1

Proportion of Heat Provided by

Secondary Heating Equipment

Close to One-Half.......................................... 4.4 0.5 0.9 1.3 1.6

About One-Quarter........................................ 5.8 0.8 1.5 2.0 1.5

Very Little or None......................................... 24.7 3.2 6.9 8.5 6.1

Type of Supplemental Heating Equipment Used

Heat Pump........................................................ 0.6 N Q 0.4 Q

Central Warm-Air Furnace................................ 2.3 Q 0.9 0.7 0.6

Steam/Hot Water System................................. Q Q Q N Q

Built-in Electric Units......................................... 2.2 0.4 0.6 0.4 0.7

Built-in Pipeless Furnace.................................. 0.3 QQQQ

Built-in Room Heaters....................................... 1.4 0.3 0.4 0.6 Q

Heating Stove................................................... 2.1 0.6 0.4 0.4 0.6

Portable Electric Heaters.................................. 14.3 2.0 3.8 4.8 3.7

Portable Kerosene Heaters............................... 0.6 Q Q 0.3 N

Cooking Stove................................................... 0.5 QQQQ

Fireplace........................................................... 10.5 0.7 2.7 3.9 3.2

Fireplace Fuel

Wood............................................................. 6.9 0.4 1.8 2.7 2.0

Natural Gas................................................... 2.7 Q 0.8 0.6 1.1

Propane......................................................... 0.9 Q Q 0.6 Q

Use of Gas Fireplace

During Winter Months

Most Days.................................................. 1.2 Q 0.4 0.4 0.3

About Once a Week.................................. 1.3 Q 0.4 0.4 0.4

Less than 4 Times each Month.................. 1.1 Q Q 0.4 0.4

Humidifier Use Each Year

Use a Humidifier................................................... 14.2 3.0 6.0 3.2 1.9

1 to 3 Months Each Year................................... 7.1 1.4 2.6 1.8 1.2

4 to 6 Months Each Year................................... 5.6 1.2 3.0 1.0 0.4

7 to 9 Months Each Year................................... 0.4 QQQQ

10 to 11 months................................................ Q N Q Q Q

Turned on All Year Long................................... 1.1 0.3 0.3 0.3 0.2

Do Not Use a Humidifier....................................... 96.9 17.5 19.6 37.5 22.2

 Q = Data withheld either because the Relative Standard Error (RSE) was greater than 50 percent or fewer than 10 households

were sampled.

 N = No cases in reporting sample.

 Notes: ● Because of rounding, data may not sum to totals. ● See Glossary for definition of terms used in these tables.

 Source: Energy Information Administration, Office of Energy Markets and End Use, Forms EIA-457 A, B, C of the 2005 

Residential Energy Consumption Survey.

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Total U.S. Housing Units........................................ 111.1 20.6 15.1 5.5

Do Not Have Heating Equpment............................ 1.2 Q Q Q

Have Space Heating Equpment............................. 109.8 20.5 15.1 5.4

Use Space Heating Equpment.............................. 109.1 20.5 15.1 5.4

Have But Do Not Use Equipment.......................... 0.8 N N N

Space Heating Usage During 2005

Heated Floorspace (Square Feet)

None................................................................. 3.6 Q Q Q

1 to 499............................................................. 6.1 1.3 0.9 0.4

500 to 999......................................................... 27.7 5.6 4.2 1.4

1,000 to 1,499................................................... 26.0 4.3 3.3 1.1

1,500 to 1,999................................................... 17.6 3.0 2.3 0.7

2,000 to 2,499................................................... 10.7 2.2 1.5 0.7

2,500 to 2,999................................................... 7.7 1.6 1.1 0.5

3,000 to 3,499................................................... 3.8 0.8 0.6 0.2

3,500 to 3,999................................................... 2.6 0.6 0.4 0.2

4,000 or More.................................................... 5.2 1.0 0.8 0.2

Total Number of Rooms

(Excluding Bathrooms)

0........................................................................ 2.1 Q N Q

1 or 2................................................................ 3.1 0.9 0.6 0.3

3........................................................................ 8.3 1.9 1.4 0.4

4........................................................................ 16.6 3.3 2.3 1.1

5........................................................................ 23.3 3.8 2.9 0.9

6........................................................................ 22.6 3.8 2.7 1.1

7........................................................................ 16.3 2.9 2.3 0.6

8........................................................................ 9.7 1.8 1.4 0.4

9 or More.......................................................... 9.1 2.1 1.6 0.6

At Home Behavior

Home Used for Business

Yes................................................................ 8.9 1.2 0.9 0.3

No................................................................. 102.2 19.3 14.2 5.1

Someone Home All Day

Yes................................................................ 56.4 10.8 8.4 2.4

No................................................................. 54.7 9.8 6.7 3.0

Housing Unit Characteristics Affecting Usage

Adequacy of Insulation

Well Insulated................................................... 42.8 8.2 5.9 2.3

Adequately Insulated......................................... 46.3 8.1 6.1 2.0

Poorly Insulated................................................ 19.0 3.7 2.7 1.0

No Insulation..................................................... 1.4 Q Q Q

Don't Know........................................................ 1.7 0.5 Q 0.2

Home is Too Drafty During the Winter

Never................................................................ 62.9 10.2 7.5 2.7

Some of the Time............................................. 32.4 7.2 5.5 1.7

Most of the Time............................................... 6.1 1.4 1.0 0.4

All of the Time................................................... 5.6 1.0 0.7 0.3

Don't Know........................................................ 4.1 0.8 0.5 0.2

 Million U.S. Housing Units

Table HC11.5 Space Heating Usage Indicators by Northeast Census Region, 2005

Space Heating Usage Indicators Middle Atlantic New England

Northeast Census Region

U.S.

Housing

Units

(millions)

Census Division

Total

Northeast

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
 Million U.S. Housing Units

Table HC11.5 Space Heating Usage Indicators by Northeast Census Region, 2005

Space Heating Usage Indicators Middle Atlantic New England

Northeast Census Region

U.S.

Housing

Units

(millions)

Census Division

Total

Northeast

Unusually High Ceilings

Yes................................................................... 27.2 3.8 2.7 1.1

No..................................................................... 76.9 16.4 12.1 4.2

Not Asked (Mobile Homes)............................... 6.9 0.4 0.3 0.2

Cathedral Ceilings

(In Housing Units with High Ceilings)

Yes................................................................ 17.1 2.0 1.4 0.6

No................................................................. 10.1 1.7 1.3 0.4

Type of Glass in Windows

Single-pane Glass............................................. 50.7 6.8 4.7 2.1

Double-pane Glass

Without Low-e Coating.................................. 50.6 12.1 9.4 2.8

With Low-e Coating....................................... 8.0 1.3 0.9 0.4

Triple-pane Glass

Without Low-e Coating.................................. 1.0 Q Q Q

With Low-e Coating....................................... 0.3 Q N Q

Proportion of Original Windows Replaced

All...................................................................... 22.4 7.1 5.3 1.8

Some................................................................ 21.6 4.6 3.5 1.1

None................................................................. 62.3 8.3 5.9 2.4

Don't Know........................................................ 4.7 0.7 0.4 0.3

Thermostats

Do Not Have a Thermostat................................. 15.3 3.7 3.2 0.5

Have a Thermostat.............................................. 95.8 16.9 11.9 4.9

1........................................................................ 84.5 13.5 9.9 3.6

2 or More.......................................................... 11.3 3.4 2.1 1.3

Have a Programmable Thermostat

Yes................................................................ 33.1 5.8 4.5 1.2

No................................................................. 62.7 11.1 7.4 3.7

Use of Programable Thermostats

Reduces Temperature During Day

Yes................................................................ 18.6 3.8 2.9 0.9

No................................................................. 14.5 1.9 1.6 0.3

Reduces Temperature at Night

Yes................................................................ 21.5 4.2 3.3 0.9

No................................................................. 11.6 1.6 1.3 0.3

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
 Million U.S. Housing Units

Table HC11.5 Space Heating Usage Indicators by Northeast Census Region, 2005

Space Heating Usage Indicators Middle Atlantic New England

Northeast Census Region

U.S.

Housing

Units

(millions)

Census Division

Total

Northeast

Winter 2005 Temperature Settings

Lower Temperature Settings

Daytime When No One is at Home

Yes................................................................ 40.5 8.6 6.1 2.5

No................................................................. 59.1 10.9 8.2 2.6

Unknown....................................................... 11.4 1.1 0.8 Q

During Sleeping Hours

Yes................................................................ 40.7 9.1 6.5 2.6

No................................................................. 60.2 10.5 7.9 2.6

Unknown....................................................... 10.2 1.0 0.7 Q

Daytime Setting When No One is at Home

Heat Turned On................................................ 93.7 19.3 14.2 5.1

63 Degrees or Less....................................... 18.9 5.3 3.6 1.8

64 to 66 Degrees........................................... 17.4 4.2 3.0 1.2

67 to 69 Degrees........................................... 17.8 3.8 2.8 1.1

70 Degrees.................................................... 16.0 3.3 2.7 0.7

71 to 73 Degrees........................................... 10.2 1.3 1.0 0.3

74 Degrees or More....................................... 13.5 1.3 1.1 0.2

Don't Know/No Answer.................................. 7.4 1.0 0.7 Q

Do Not Use Space Heating............................ 1.3 Q Q Q

Heat Turned Off................................................ 8.7 Q Q Q

Daytime Setting When Someone is at Home

Heat Turned On................................................ 101.5 19.6 14.4 5.2

63 Degrees or Less....................................... 4.1 1.5 1.1 0.4

64 to 66 Degrees........................................... 8.2 2.4 1.5 0.9

67 to 69 Degrees........................................... 23.6 5.5 3.8 1.7

70 Degrees.................................................... 24.6 5.3 4.0 1.3

71 to 73 Degrees........................................... 17.6 2.5 2.0 0.5

74 Degrees or More....................................... 23.2 2.4 2.0 0.4

Don't Know/No Answer.................................. 6.0 0.9 0.7 Q

Do Not Use Space Heating............................ 1.3 Q Q Q

Heat Turned Off................................................ 2.3 Q Q N

Setting During Sleeping Hours

Heat Turned On................................................ 98.1 19.5 14.3 5.2

63 Degrees or Less....................................... 13.0 3.8 2.3 1.5

64 to 66 Degrees........................................... 18.4 4.7 3.4 1.3

67 to 69 Degrees........................................... 20.8 4.2 3.0 1.2

70 Degrees.................................................... 18.5 3.6 2.9 0.6

71 to 73 Degrees........................................... 11.1 1.4 1.1 0.3

74 Degrees or More....................................... 16.3 1.8 1.5 0.3

Don't Know/No Answer.................................. 6.4 0.9 0.7 Q

Do Not Use Space Heating............................ 1.3 Q Q Q

Heat Turned Off................................................ 5.4 Q Q Q

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
 Million U.S. Housing Units

Table HC11.5 Space Heating Usage Indicators by Northeast Census Region, 2005

Space Heating Usage Indicators Middle Atlantic New England

Northeast Census Region

U.S.

Housing

Units

(millions)

Census Division

Total

Northeast

Secondary Heating

Use Any Secondary Heating Equipment

Yes................................................................... 34.9 4.4 3.0 1.4

No..................................................................... 74.9 16.1 12.0 4.0

Proportion of Heat Provided by

Secondary Heating Equipment

Close to One-Half.......................................... 4.4 0.5 0.3 Q

About One-Quarter........................................ 5.8 0.8 0.5 0.3

Very Little or None......................................... 24.7 3.2 2.2 1.0

Type of Supplemental Heating Equipment Used

Heat Pump........................................................ 0.6 N N N

Central Warm-Air Furnace................................ 2.3 Q Q Q

Steam/Hot Water System................................. QQQQ

Built-in Electric Units......................................... 2.2 0.4 Q 0.2

Built-in Pipeless Furnace.................................. 0.3 Q Q Q

Built-in Room Heaters....................................... 1.4 0.3 Q Q

Heating Stove................................................... 2.1 0.6 0.3 0.3

Portable Electric Heaters.................................. 14.3 2.0 1.4 0.5

Portable Kerosene Heaters............................... 0.6 Q Q Q

Cooking Stove................................................... 0.5 Q Q Q

Fireplace........................................................... 10.5 0.7 0.5 0.2

Fireplace Fuel

Wood............................................................. 6.9 0.4 Q Q

Natural Gas................................................... 2.7 Q Q Q

Propane......................................................... 0.9 Q Q Q

Use of Gas Fireplace

During Winter Months

Most Days.................................................. 1.2 Q Q Q

About Once a Week.................................. 1.3 Q Q N

Less than 4 Times each Month.................. 1.1 Q Q Q

Humidifier Use Each Year

Use a Humidifier................................................... 14.2 3.0 2.0 1.1

1 to 3 Months Each Year................................... 7.1 1.4 0.8 0.6

4 to 6 Months Each Year................................... 5.6 1.2 0.8 0.4

7 to 9 Months Each Year................................... 0.4 Q Q Q

10 to 11 months................................................ Q N N N

Turned on All Year Long................................... 1.1 0.3 Q Q

Do Not Use a Humidifier....................................... 96.9 17.5 13.2 4.4

 Q = Data withheld either because the Relative Standard Error (RSE) was greater than 50 percent or fewer than 10 households were 

sampled.

 N = No cases in reporting sample.

 Notes: ● Because of rounding, data may not sum to totals. ● See Glossary for definition of terms used in these tables.

 Source: Energy Information Administration, Office of Energy Markets and End Use, Forms EIA-457 A, B, C of the 2005 

Residential Energy Consumption Survey.

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Total U.S. Housing Units........................................ 111.1 25.6 17.7 7.9

Do Not Have Heating Equpment............................ 1.2 Q Q N

Have Space Heating Equpment............................. 109.8 25.6 17.7 7.9

Use Space Heating Equpment.............................. 109.1 25.6 17.7 7.9

Have But Do Not Use Equipment.......................... 0.8 N N N

Space Heating Usage During 2005

Heated Floorspace (Square Feet)

None................................................................. 3.6 0.5 Q Q

1 to 499............................................................. 6.1 0.9 0.6 0.2

500 to 999......................................................... 27.7 5.7 3.6 2.1

1,000 to 1,499................................................... 26.0 5.2 3.9 1.3

1,500 to 1,999................................................... 17.6 3.9 2.7 1.2

2,000 to 2,499................................................... 10.7 2.8 1.8 1.0

2,500 to 2,999................................................... 7.7 2.2 1.6 0.6

3,000 to 3,499................................................... 3.8 1.5 1.0 0.6

3,500 to 3,999................................................... 2.6 1.1 0.7 0.3

4,000 or More.................................................... 5.2 1.9 1.4 0.5

Total Number of Rooms

(Excluding Bathrooms)

0........................................................................ 2.1 0.5 Q Q

1 or 2................................................................ 3.1 0.8 0.6 Q

3........................................................................ 8.3 1.3 0.7 0.6

4........................................................................ 16.6 3.2 2.2 1.0

5........................................................................ 23.3 5.5 3.9 1.6

6........................................................................ 22.6 5.2 3.3 1.9

7........................................................................ 16.3 3.8 2.8 1.0

8........................................................................ 9.7 2.6 1.8 0.8

9 or More.......................................................... 9.1 2.6 1.9 0.8

At Home Behavior

Home Used for Business

Yes................................................................ 8.9 2.0 1.2 0.8

No................................................................. 102.2 23.6 16.5 7.1

Someone Home All Day

Yes................................................................ 56.4 12.7 8.6 4.1

No................................................................. 54.7 12.9 9.1 3.7

Housing Unit Characteristics Affecting Usage

Adequacy of Insulation

Well Insulated................................................... 42.8 10.6 7.2 3.4

Adequately Insulated......................................... 46.3 10.6 7.5 3.1

Poorly Insulated................................................ 19.0 3.7 2.6 1.1

No Insulation..................................................... 1.4 Q Q Q

Don't Know........................................................ 1.7 0.5 0.3 Q

Home is Too Drafty During the Winter

Never................................................................ 62.9 14.1 9.5 4.6

Some of the Time............................................. 32.4 7.0 4.9 2.1

Most of the Time............................................... 6.1 1.5 1.3 0.2

All of the Time................................................... 5.6 1.7 1.4 0.3

Don't Know........................................................ 4.1 1.3 0.7 0.6

 Million U.S. Housing Units

Table HC12.5 Space Heating Usage Indicators by Midwest Census Region, 2005

Space Heating Usage Indicators East North Central West North Central

Midwest Census Region

U.S.

Housing

Units

(millions)

Census Division

Total

Midwest

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
 Million U.S. Housing Units

Table HC12.5 Space Heating Usage Indicators by Midwest Census Region, 2005

Space Heating Usage Indicators East North Central West North Central

Midwest Census Region

U.S.

Housing

Units

(millions)

Census Division

Total

Midwest

Unusually High Ceilings

Yes................................................................... 27.2 6.1 4.1 2.0

No..................................................................... 76.9 18.8 13.2 5.5

Not Asked (Mobile Homes)............................... 6.9 0.8 0.4 0.3

Cathedral Ceilings

(In Housing Units with High Ceilings)

Yes................................................................ 17.1 3.6 2.5 1.1

No................................................................. 10.1 2.5 1.6 0.9

Type of Glass in Windows

Single-pane Glass............................................. 50.7 8.5 5.6 2.9

Double-pane Glass

Without Low-e Coating.................................. 50.6 13.6 9.7 3.9

With Low-e Coating....................................... 8.0 2.9 2.0 0.9

Triple-pane Glass

Without Low-e Coating.................................. 1.0 0.5 0.4 Q

With Low-e Coating....................................... 0.3 Q Q Q

Proportion of Original Windows Replaced

All...................................................................... 22.4 6.1 5.1 1.0

Some................................................................ 21.6 5.4 3.8 1.6

None................................................................. 62.3 13.1 8.3 4.8

Don't Know........................................................ 4.7 1.0 0.6 0.4

Thermostats

Do Not Have a Thermostat................................. 15.3 1.9 1.1 0.7

Have a Thermostat.............................................. 95.8 23.7 16.6 7.1

1........................................................................ 84.5 21.3 15.1 6.1

2 or More.......................................................... 11.3 2.5 1.5 1.0

Have a Programmable Thermostat

Yes................................................................ 33.1 8.3 6.0 2.3

No................................................................. 62.7 15.4 10.6 4.8

Use of Programable Thermostats

Reduces Temperature During Day

Yes................................................................ 18.6 4.7 3.5 1.2

No................................................................. 14.5 3.6 2.5 1.1

Reduces Temperature at Night

Yes................................................................ 21.5 5.4 3.9 1.5

No................................................................. 11.6 2.9 2.1 0.8

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
 Million U.S. Housing Units

Table HC12.5 Space Heating Usage Indicators by Midwest Census Region, 2005

Space Heating Usage Indicators East North Central West North Central

Midwest Census Region

U.S.

Housing

Units

(millions)

Census Division

Total

Midwest

Winter 2005 Temperature Settings

Lower Temperature Settings

Daytime When No One is at Home

Yes................................................................ 40.5 11.7 8.1 3.6

No................................................................. 59.1 13.0 9.1 3.9

Unknown....................................................... 11.4 0.9 0.5 0.3

During Sleeping Hours

Yes................................................................ 40.7 11.0 7.5 3.5

No................................................................. 60.2 13.8 9.8 4.0

Unknown....................................................... 10.2 0.8 0.5 0.3

Daytime Setting When No One is at Home

Heat Turned On................................................ 93.7 24.7 17.2 7.5

63 Degrees or Less....................................... 18.9 4.7 3.6 1.2

64 to 66 Degrees........................................... 17.4 5.0 3.2 1.7

67 to 69 Degrees........................................... 17.8 5.5 4.0 1.5

70 Degrees.................................................... 16.0 4.2 2.6 1.5

71 to 73 Degrees........................................... 10.2 3.1 2.4 0.7

74 Degrees or More....................................... 13.5 2.2 1.4 0.8

Don't Know/No Answer.................................. 7.4 0.8 0.5 0.3

Do Not Use Space Heating............................ 1.3 Q Q N

Heat Turned Off................................................ 8.7 Q Q N

Daytime Setting When Someone is at Home

Heat Turned On................................................ 101.5 24.9 17.4 7.5

63 Degrees or Less....................................... 4.1 0.8 0.5 Q

64 to 66 Degrees........................................... 8.2 1.9 1.4 0.5

67 to 69 Degrees........................................... 23.6 6.8 4.8 2.0

70 Degrees.................................................... 24.6 6.1 4.2 1.9

71 to 73 Degrees........................................... 17.6 5.2 3.6 1.5

74 Degrees or More....................................... 23.2 4.2 2.8 1.4

Don't Know/No Answer.................................. 6.0 0.6 0.3 0.3

Do Not Use Space Heating............................ 1.3 Q Q N

Heat Turned Off................................................ 2.3 N N N

Setting During Sleeping Hours

Heat Turned On................................................ 98.1 24.8 17.3 7.5

63 Degrees or Less....................................... 13.0 2.8 1.8 1.0

64 to 66 Degrees........................................... 18.4 5.2 3.6 1.5

67 to 69 Degrees........................................... 20.8 6.8 5.0 1.9

70 Degrees.................................................... 18.5 4.3 2.9 1.3

71 to 73 Degrees........................................... 11.1 3.0 2.1 0.9

74 Degrees or More....................................... 16.3 2.8 1.8 0.9

Don't Know/No Answer.................................. 6.4 0.7 0.4 0.3

Do Not Use Space Heating............................ 1.3 Q Q N

Heat Turned Off................................................ 5.4 N N N

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
 Million U.S. Housing Units

Table HC12.5 Space Heating Usage Indicators by Midwest Census Region, 2005

Space Heating Usage Indicators East North Central West North Central

Midwest Census Region

U.S.

Housing

Units

(millions)

Census Division

Total

Midwest

Secondary Heating

Use Any Secondary Heating Equipment

Yes................................................................... 34.9 9.4 6.3 3.0

No..................................................................... 74.9 16.2 11.3 4.8

Proportion of Heat Provided by

Secondary Heating Equipment

Close to One-Half.......................................... 4.4 0.9 0.7 Q

About One-Quarter........................................ 5.8 1.5 0.9 0.6

Very Little or None......................................... 24.7 6.9 4.7 2.2

Type of Supplemental Heating Equipment Used

Heat Pump........................................................ 0.6 Q Q Q

Central Warm-Air Furnace................................ 2.3 0.9 0.5 0.3

Steam/Hot Water System................................. Q Q Q N

Built-in Electric Units......................................... 2.2 0.6 0.4 0.3

Built-in Pipeless Furnace.................................. 0.3 Q N Q

Built-in Room Heaters....................................... 1.4 0.4 0.3 Q

Heating Stove................................................... 2.1 0.4 Q Q

Portable Electric Heaters.................................. 14.3 3.8 2.9 0.9

Portable Kerosene Heaters............................... 0.6 Q Q Q

Cooking Stove................................................... 0.5 Q Q Q

Fireplace........................................................... 10.5 2.7 1.6 1.1

Fireplace Fuel

Wood............................................................. 6.9 1.8 1.0 0.7

Natural Gas................................................... 2.7 0.8 0.4 0.4

Propane......................................................... 0.9 Q Q N

Use of Gas Fireplace

During Winter Months

Most Days.................................................. 1.2 0.4 Q Q

About Once a Week.................................. 1.3 0.4 Q Q

Less than 4 Times each Month.................. 1.1 Q Q Q

Humidifier Use Each Year

Use a Humidifier................................................... 14.2 6.0 4.3 1.7

1 to 3 Months Each Year................................... 7.1 2.6 1.7 0.9

4 to 6 Months Each Year................................... 5.6 3.0 2.3 0.7

7 to 9 Months Each Year................................... 0.4 Q Q Q

10 to 11 months................................................ Q Q Q N

Turned on All Year Long................................... 1.1 0.3 Q Q

Do Not Use a Humidifier....................................... 96.9 19.6 13.4 6.1

 Q = Data withheld either because the Relative Standard Error (RSE) was greater than 50 percent or fewer than 10 households were 

sampled.

 N = No cases in reporting sample.

 Notes: ● Because of rounding, data may not sum to totals. ● See Glossary for definition of terms used in these tables.

 Source: Energy Information Administration, Office of Energy Markets and End Use, Forms EIA-457 A, B, C of the 2005 

Residential Energy Consumption Survey.

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Total U.S. Housing Units........................................ 111.1 40.7 21.7 6.9 12.1

Do Not Have Heating Equpment............................ 1.2 Q Q N Q

Have Space Heating Equpment............................. 109.8 40.3 21.4 6.9 12.0

Use Space Heating Equpment.............................. 109.1 40.1 21.2 6.9 12.0

Have But Do Not Use Equipment.......................... 0.8 Q Q N N

Space Heating Usage During 2005

Heated Floorspace (Square Feet)

None................................................................. 3.6 0.8 0.7 Q Q

1 to 499............................................................. 6.1 1.9 0.9 0.2 0.8

500 to 999......................................................... 27.7 10.5 4.9 1.7 3.9

1,000 to 1,499................................................... 26.0 11.3 6.2 2.1 3.1

1,500 to 1,999................................................... 17.6 6.8 3.5 1.3 2.0

2,000 to 2,499................................................... 10.7 3.7 2.0 0.7 1.0

2,500 to 2,999................................................... 7.7 2.3 1.4 0.3 0.6

3,000 to 3,499................................................... 3.8 1.0 0.6 0.2 Q

3,500 to 3,999................................................... 2.6 0.6 0.4 Q Q

4,000 or More.................................................... 5.2 1.7 1.1 0.2 0.4

Total Number of Rooms

(Excluding Bathrooms)

0........................................................................ 2.1 0.3 Q Q N

1 or 2................................................................ 3.1 0.6 Q Q 0.3

3........................................................................ 8.3 3.2 1.7 0.4 1.1

4........................................................................ 16.6 6.5 3.3 1.4 1.7

5........................................................................ 23.3 9.1 4.9 1.5 2.7

6........................................................................ 22.6 8.8 4.3 1.7 2.8

7........................................................................ 16.3 6.0 3.2 0.9 1.9

8........................................................................ 9.7 3.3 1.9 0.5 0.8

9 or More.......................................................... 9.1 2.9 1.7 0.4 0.8

At Home Behavior

Home Used for Business

Yes................................................................ 8.9 3.0 1.9 0.5 0.6

No................................................................. 102.2 37.7 19.8 6.4 11.5

Someone Home All Day

Yes................................................................ 56.4 19.8 10.4 3.3 6.2

No................................................................. 54.7 20.9 11.3 3.6 6.0

Housing Unit Characteristics Affecting Usage

Adequacy of Insulation

Well Insulated................................................... 42.8 16.1 9.1 2.5 4.5

Adequately Insulated......................................... 46.3 17.0 9.1 3.2 4.7

Poorly Insulated................................................ 19.0 6.8 3.1 1.1 2.6

No Insulation..................................................... 1.4 0.3 Q Q Q

Don't Know........................................................ 1.7 0.5 Q Q Q

Home is Too Drafty During the Winter

Never................................................................ 62.9 25.8 14.0 4.3 7.5

Some of the Time............................................. 32.4 10.4 5.6 1.7 3.0

Most of the Time............................................... 6.1 1.7 0.8 0.3 0.6

All of the Time................................................... 5.6 1.5 0.6 0.3 0.6

Don't Know........................................................ 4.1 1.3 0.7 0.2 0.4

Table HC13.5 Space Heating Usage Indicators by South Census Region, 2005

Space Heating Usage Indicators South Atlantic East South 

Central

West South 

Central

South Census Region

U.S.

Housing

Units

(millions)

Census Division

Total 

South

 Million U.S. Housing Units

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Table HC13.5 Space Heating Usage Indicators by South Census Region, 2005

Space Heating Usage Indicators South Atlantic East South 

Central

West South 

Central

South Census Region

U.S.

Housing

Units

(millions)

Census Division

Total 

South

 Million U.S. Housing Units

Unusually High Ceilings

Yes................................................................... 27.2 9.9 4.7 1.5 3.7

No..................................................................... 76.9 27.0 15.0 4.7 7.3

Not Asked (Mobile Homes)............................... 6.9 3.8 2.0 0.7 1.1

Cathedral Ceilings

(In Housing Units with High Ceilings)

Yes................................................................ 17.1 6.4 3.1 1.0 2.2

No................................................................. 10.1 3.5 1.6 0.5 1.4

Type of Glass in Windows

Single-pane Glass............................................. 50.7 23.6 12.3 3.4 8.0

Double-pane Glass

Without Low-e Coating.................................. 50.6 14.9 7.9 3.1 3.8

With Low-e Coating....................................... 8.0 1.7 1.1 0.3 0.3

Triple-pane Glass

Without Low-e Coating.................................. 1.0 QQQQ

With Low-e Coating....................................... 0.3 Q Q Q N

Proportion of Original Windows Replaced

All...................................................................... 22.4 5.3 3.7 0.8 0.8

Some................................................................ 21.6 6.3 2.9 1.3 2.0

None................................................................. 62.3 27.4 14.2 4.6 8.6

Don't Know........................................................ 4.7 1.8 0.9 0.2 0.7

Thermostats

Do Not Have a Thermostat................................. 15.3 5.5 2.1 1.0 2.4

Have a Thermostat.............................................. 95.8 35.2 19.6 5.9 9.7

1........................................................................ 84.5 31.7 17.3 5.3 9.1

2 or More.......................................................... 11.3 3.5 2.3 0.5 0.7

Have a Programmable Thermostat

Yes................................................................ 33.1 9.9 5.9 1.1 2.9

No................................................................. 62.7 25.3 13.7 4.8 6.8

Use of Programable Thermostats

Reduces Temperature During Day

Yes................................................................ 18.6 5.2 3.2 0.4 1.6

No................................................................. 14.5 4.7 2.7 0.6 1.3

Reduces Temperature at Night

Yes................................................................ 21.5 6.0 3.5 0.6 1.9

No................................................................. 11.6 3.9 2.4 0.4 1.1

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Table HC13.5 Space Heating Usage Indicators by South Census Region, 2005

Space Heating Usage Indicators South Atlantic East South 

Central

West South 

Central

South Census Region

U.S.

Housing

Units

(millions)

Census Division

Total 

South

 Million U.S. Housing Units

Winter 2005 Temperature Settings

Lower Temperature Settings

Daytime When No One is at Home

Yes................................................................ 40.5 11.9 6.4 1.8 3.7

No................................................................. 59.1 24.1 12.7 4.5 6.9

Unknown....................................................... 11.4 4.6 2.6 0.6 1.5

During Sleeping Hours

Yes................................................................ 40.7 11.5 5.8 1.9 3.8

No................................................................. 60.2 24.9 13.6 4.4 6.9

Unknown....................................................... 10.2 4.3 2.4 0.6 1.4

Daytime Setting When No One is at Home

Heat Turned On................................................ 93.7 34.3 18.5 6.2 9.7

63 Degrees or Less....................................... 18.9 4.3 2.5 0.7 1.1

64 to 66 Degrees........................................... 17.4 5.0 2.6 0.8 1.6

67 to 69 Degrees........................................... 17.8 5.9 3.2 1.2 1.5

70 Degrees.................................................... 16.0 6.1 3.3 1.0 1.8

71 to 73 Degrees........................................... 10.2 4.8 2.6 0.9 1.2

74 Degrees or More....................................... 13.5 8.3 4.3 1.6 2.4

Don't Know/No Answer.................................. 7.4 3.1 1.5 0.5 1.2

Do Not Use Space Heating............................ 1.3 0.4 Q N Q

Heat Turned Off................................................ 8.7 2.8 1.5 0.3 1.1

Daytime Setting When Someone is at Home

Heat Turned On................................................ 101.5 36.5 19.3 6.3 10.8

63 Degrees or Less....................................... 4.1 0.8 0.4 Q 0.3

64 to 66 Degrees........................................... 8.2 2.0 1.2 0.3 0.5

67 to 69 Degrees........................................... 23.6 6.4 3.3 1.4 1.7

70 Degrees.................................................... 24.6 8.0 4.4 1.3 2.3

71 to 73 Degrees........................................... 17.6 7.0 3.8 1.2 2.0

74 Degrees or More....................................... 23.2 12.3 6.2 2.0 4.1

Don't Know/No Answer.................................. 6.0 2.9 1.3 0.5 1.1

Do Not Use Space Heating............................ 1.3 0.4 Q N Q

Heat Turned Off................................................ 2.3 0.9 0.8 Q Q

Setting During Sleeping Hours

Heat Turned On................................................ 98.1 35.9 19.1 6.3 10.4

63 Degrees or Less....................................... 13.0 2.4 1.3 0.4 0.7

64 to 66 Degrees........................................... 18.4 4.8 2.5 0.8 1.5

67 to 69 Degrees........................................... 20.8 6.5 3.4 1.4 1.8

70 Degrees.................................................... 18.5 7.4 3.9 1.1 2.4

71 to 73 Degrees........................................... 11.1 5.5 3.1 1.0 1.4

74 Degrees or More....................................... 16.3 9.3 4.9 1.6 2.8

Don't Know/No Answer.................................. 6.4 2.8 1.3 0.4 1.1

Do Not Use Space Heating............................ 1.3 0.4 Q N Q

Heat Turned Off................................................ 5.4 1.6 1.0 Q 0.5

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Table HC13.5 Space Heating Usage Indicators by South Census Region, 2005

Space Heating Usage Indicators South Atlantic East South 

Central

West South 

Central

South Census Region

U.S.

Housing

Units

(millions)

Census Division

Total 

South

 Million U.S. Housing Units

Secondary Heating

Use Any Secondary Heating Equipment

Yes................................................................... 34.9 11.8 5.9 2.8 3.1

No..................................................................... 74.9 28.5 15.5 4.1 8.9

Proportion of Heat Provided by

Secondary Heating Equipment

Close to One-Half.......................................... 4.4 1.3 0.9 Q Q

About One-Quarter........................................ 5.8 2.0 1.1 0.4 0.5

Very Little or None......................................... 24.7 8.5 3.9 2.2 2.4

Type of Supplemental Heating Equipment Used

Heat Pump........................................................ 0.6 0.4 0.3 Q N

Central Warm-Air Furnace................................ 2.3 0.7 0.3 0.2 Q

Steam/Hot Water System................................. Q NNNN

Built-in Electric Units......................................... 2.2 0.4 0.3 Q N

Built-in Pipeless Furnace.................................. 0.3 Q Q N Q

Built-in Room Heaters....................................... 1.4 0.6 Q Q Q

Heating Stove................................................... 2.1 0.4 Q Q Q

Portable Electric Heaters.................................. 14.3 4.8 2.2 1.2 1.5

Portable Kerosene Heaters............................... 0.6 0.3 Q Q N

Cooking Stove................................................... 0.5 QQQQ

Fireplace........................................................... 10.5 3.9 2.1 0.9 1.0

Fireplace Fuel

Wood............................................................. 6.9 2.7 1.4 0.5 0.8

Natural Gas................................................... 2.7 0.6 Q 0.2 Q

Propane......................................................... 0.9 0.6 0.4 Q Q

Use of Gas Fireplace

During Winter Months

Most Days.................................................. 1.2 0.4 Q Q Q

About Once a Week.................................. 1.3 0.4 Q Q Q

Less than 4 Times each Month.................. 1.1 0.4 Q Q Q

Humidifier Use Each Year

Use a Humidifier................................................... 14.2 3.2 1.9 0.7 0.6

1 to 3 Months Each Year................................... 7.1 1.8 0.9 0.4 0.5

4 to 6 Months Each Year................................... 5.6 1.0 0.7 0.2 Q

7 to 9 Months Each Year................................... 0.4 Q Q N Q

10 to 11 months................................................ Q Q N Q N

Turned on All Year Long................................... 1.1 0.3 Q Q Q

Do Not Use a Humidifier....................................... 96.9 37.5 19.8 6.2 11.5

 Q = Data withheld either because the Relative Standard Error (RSE) was greater than 50 percent or fewer than 10 households

were sampled.

 N = No cases in reporting sample.

 Notes: ● Because of rounding, data may not sum to totals. ● See Glossary for definition of terms used in these tables.

 Source: Energy Information Administration, Office of Energy Markets and End Use, Forms EIA-457 A, B, C of the 2005 

Residential Energy Consumption Survey.

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Total U.S. Housing Units........................................ 111.1 24.2 7.6 16.6

Do Not Have Heating Equpment............................ 1.2 0.7 Q 0.7

Have Space Heating Equpment............................. 109.8 23.4 7.5 16.0

Use Space Heating Equpment.............................. 109.1 22.9 7.4 15.4

Have But Do Not Use Equipment.......................... 0.8 0.6 Q 0.5

Space Heating Usage During 2005

Heated Floorspace (Square Feet)

None................................................................. 3.6 2.1 Q 1.9

1 to 499............................................................. 6.1 2.1 0.4 1.7

500 to 999......................................................... 27.7 6.0 1.6 4.4

1,000 to 1,499................................................... 26.0 5.2 1.8 3.4

1,500 to 1,999................................................... 17.6 3.9 1.7 2.2

2,000 to 2,499................................................... 10.7 2.0 0.7 1.3

2,500 to 2,999................................................... 7.7 1.6 0.7 0.9

3,000 to 3,499................................................... 3.8 0.4 Q 0.2

3,500 to 3,999................................................... 2.6 0.3 Q Q

4,000 or More.................................................... 5.2 0.6 0.3 0.3

Total Number of Rooms

(Excluding Bathrooms)

0........................................................................ 2.1 1.1 Q 1.0

1 or 2................................................................ 3.1 0.8 0.3 0.6

3........................................................................ 8.3 1.9 0.3 1.5

4........................................................................ 16.6 3.5 1.0 2.5

5........................................................................ 23.3 5.0 1.7 3.3

6........................................................................ 22.6 4.8 1.6 3.1

7........................................................................ 16.3 3.6 1.2 2.4

8........................................................................ 9.7 2.0 0.8 1.2

9 or More.......................................................... 9.1 1.5 0.6 0.9

At Home Behavior

Home Used for Business

Yes................................................................ 8.9 2.6 1.0 1.6

No................................................................. 102.2 21.6 6.5 15.1

Someone Home All Day

Yes................................................................ 56.4 13.0 4.1 8.9

No................................................................. 54.7 11.2 3.4 7.8

Housing Unit Characteristics Affecting Usage

Adequacy of Insulation

Well Insulated................................................... 42.8 7.9 2.8 5.1

Adequately Insulated......................................... 46.3 10.6 3.3 7.3

Poorly Insulated................................................ 19.0 4.9 1.3 3.5

No Insulation..................................................... 1.4 0.6 Q 0.5

Don't Know........................................................ 1.7 0.2 Q 0.2

Home is Too Drafty During the Winter

Never................................................................ 62.9 12.9 3.8 9.0

Some of the Time............................................. 32.4 7.8 2.5 5.2

Most of the Time............................................... 6.1 1.5 0.5 1.0

All of the Time................................................... 5.6 1.4 0.4 1.0

Don't Know........................................................ 4.1 0.7 0.3 0.4

 Million U.S. Housing Units

Table HC14.5 Space Heating Usage Indicators by West Census Region, 2005

Space Heating Usage Indicators Mountain Pacific

West Census Region

U.S.

Housing

Units

(millions)

Census Division

Total

West

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
 Million U.S. Housing Units

Table HC14.5 Space Heating Usage Indicators by West Census Region, 2005

Space Heating Usage Indicators Mountain Pacific

West Census Region

U.S.

Housing

Units

(millions)

Census Division

Total

West

Unusually High Ceilings

Yes................................................................... 27.2 7.5 2.8 4.6

No..................................................................... 76.9 14.8 3.8 11.0

Not Asked (Mobile Homes)............................... 6.9 2.0 0.9 1.0

Cathedral Ceilings

(In Housing Units with High Ceilings)

Yes................................................................ 17.1 5.1 2.0 3.0

No................................................................. 10.1 2.4 0.8 1.6

Type of Glass in Windows

Single-pane Glass............................................. 50.7 11.8 2.8 8.9

Double-pane Glass

Without Low-e Coating.................................. 50.6 10.1 3.6 6.4

With Low-e Coating....................................... 8.0 2.0 0.9 1.1

Triple-pane Glass

Without Low-e Coating.................................. 1.0 Q Q Q

With Low-e Coating....................................... 0.3 Q Q Q

Proportion of Original Windows Replaced

All...................................................................... 22.4 4.0 0.8 3.1

Some................................................................ 21.6 5.4 1.8 3.7

None................................................................. 62.3 13.5 4.7 8.8

Don't Know........................................................ 4.7 1.3 0.3 1.0

Thermostats

Do Not Have a Thermostat................................. 15.3 4.2 0.8 3.4

Have a Thermostat.............................................. 95.8 20.0 6.8 13.2

1........................................................................ 84.5 18.0 5.9 12.1

2 or More.......................................................... 11.3 2.0 0.9 1.1

Use a Programmable Thermostat

Yes................................................................ 33.1 9.1 2.6 6.5

No................................................................. 62.7 10.9 4.2 6.7

Use of Programable Thermostats

Reduces Temperature During Day

Yes................................................................ 18.6 4.8 1.7 3.1

No................................................................. 14.5 4.4 0.9 3.4

Reduces Temperature at Night

Yes................................................................ 21.5 5.9 1.9 3.9

No................................................................. 11.6 3.2 0.7 2.6

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
 Million U.S. Housing Units

Table HC14.5 Space Heating Usage Indicators by West Census Region, 2005

Space Heating Usage Indicators Mountain Pacific

West Census Region

U.S.

Housing

Units

(millions)

Census Division

Total

West

Winter 2005 Temperature Settings

Lower Temperature Settings

Daytime When No One is at Home

Yes................................................................ 40.5 8.2 3.4 4.8

No................................................................. 59.1 11.1 3.5 7.5

Unknown....................................................... 11.4 4.9 0.6 4.3

During Sleeping Hours

Yes................................................................ 40.7 9.1 3.5 5.6

No................................................................. 60.2 11.1 3.4 7.7

Unknown....................................................... 10.2 4.1 0.6 3.4

Daytime Setting When No One is at Home

Heat Turned On................................................ 93.7 15.4 6.3 9.0

63 Degrees or Less....................................... 18.9 4.6 1.8 2.8

64 to 66 Degrees........................................... 17.4 3.3 1.5 1.8

67 to 69 Degrees........................................... 17.8 2.5 1.0 1.5

70 Degrees.................................................... 16.0 2.4 1.1 1.3

71 to 73 Degrees........................................... 10.2 1.0 0.2 0.8

74 Degrees or More....................................... 13.5 1.6 0.8 0.8

Don't Know/No Answer.................................. 7.4 2.5 0.4 2.1

Do Not Use Space Heating............................ 1.3 0.7 Q 0.7

Heat Turned Off................................................ 8.7 5.6 0.8 4.8

Daytime Setting When Someone is at Home

Heat Turned On................................................ 101.5 20.5 6.9 13.6

63 Degrees or Less....................................... 4.1 1.1 0.3 0.8

64 to 66 Degrees........................................... 8.2 1.9 0.7 1.2

67 to 69 Degrees........................................... 23.6 4.9 1.8 3.1

70 Degrees.................................................... 24.6 5.3 1.8 3.5

71 to 73 Degrees........................................... 17.6 3.0 0.9 2.0

74 Degrees or More....................................... 23.2 4.4 1.5 2.9

Don't Know/No Answer.................................. 6.0 1.6 0.4 1.2

Do Not Use Space Heating............................ 1.3 0.7 Q 0.7

Heat Turned Off................................................ 2.3 1.3 Q 1.2

Setting During Sleeping Hours

Heat Turned On................................................ 98.1 17.9 6.6 11.2

63 Degrees or Less....................................... 13.0 4.0 1.4 2.6

64 to 66 Degrees........................................... 18.4 3.7 1.6 2.1

67 to 69 Degrees........................................... 20.8 3.2 1.2 2.0

70 Degrees.................................................... 18.5 3.3 1.1 2.2

71 to 73 Degrees........................................... 11.1 1.2 0.3 0.9

74 Degrees or More....................................... 16.3 2.5 1.1 1.5

Don't Know/No Answer.................................. 6.4 1.9 0.4 1.5

Do Not Use Space Heating............................ 1.3 0.7 Q 0.7

Heat Turned Off................................................ 5.4 3.7 0.5 3.2

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
 Million U.S. Housing Units

Table HC14.5 Space Heating Usage Indicators by West Census Region, 2005

Space Heating Usage Indicators Mountain Pacific

West Census Region

U.S.

Housing

Units

(millions)

Census Division

Total

West

Secondary Heating

Use Any Secondary Heating Equipment

Yes................................................................... 34.9 9.3 3.1 6.2

No..................................................................... 74.9 14.1 4.4 9.8

Proportion of Heat Provided by

Secondary Heating Equipment

Close to One-Half.......................................... 4.4 1.6 0.6 1.0

About One-Quarter........................................ 5.8 1.5 0.5 1.0

Very Little or None......................................... 24.7 6.1 2.0 4.1

Type of Supplemental Heating Equipment Used

Heat Pump........................................................ 0.6 Q N Q

Central Warm-Air Furnace................................ 2.3 0.6 Q 0.5

Steam/Hot Water System................................. Q Q N Q

Built-in Electric Units......................................... 2.2 0.7 Q 0.5

Built-in Pipeless Furnace.................................. 0.3 Q Q Q

Built-in Room Heaters....................................... 1.4 Q Q N

Heating Stove................................................... 2.1 0.6 0.3 0.3

Portable Electric Heaters.................................. 14.3 3.7 1.1 2.5

Portable Kerosene Heaters............................... 0.6 N N N

Cooking Stove................................................... 0.5 Q Q Q

Fireplace........................................................... 10.5 3.2 1.1 2.1

Fireplace Fuel

Wood............................................................. 6.9 2.0 0.6 1.4

Natural Gas................................................... 2.7 1.1 0.4 0.7

Propane......................................................... 0.9 Q Q Q

Use of Gas Fireplace

During Winter Months

Most Days.................................................. 1.2 0.3 Q 0.3

About Once a Week.................................. 1.3 0.4 Q Q

Less than 4 Times each Month.................. 1.1 0.4 Q Q

Humidifier Use Each Year

Use a Humidifier................................................... 14.2 1.9 1.1 0.8

1 to 3 Months Each Year................................... 7.1 1.2 0.7 0.6

4 to 6 Months Each Year................................... 5.6 0.4 0.3 Q

7 to 9 Months Each Year................................... 0.4 Q Q N

10 to 11 months................................................ Q Q Q N

Turned on All Year Long................................... 1.1 0.2 Q Q

Do Not Use a Humidifier....................................... 96.9 22.2 6.4 15.8

 Q = Data withheld either because the Relative Standard Error (RSE) was greater than 50 percent or fewer than 10 households were 

sampled.

 N = No cases in reporting sample.

 Notes: ● Because of rounding, data may not sum to totals. ● See Glossary for definition of terms used in these tables.

 Source: Energy Information Administration, Office of Energy Markets and End Use, Forms EIA-457 A, B, C of the 2005 

Residential Energy Consumption Survey.

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Total U.S. Housing Units............................................ 111.1 7.1 7.0 8.0 12.1

Do Not Have Heating Equpment................................ 1.2 Q Q Q 0.2

Have Space Heating Equpment................................. 109.8 7.1 6.8 7.9 11.9

Use Space Heating Equpment.................................. 109.1 7.1 6.6 7.9 11.4

Have But Do Not Use Equipment.............................. 0.8 N Q N 0.5

Space Heating Usage During 2005

Heated Floorspace (Square Feet)

None...................................................................... 3.6 Q 0.7 Q 1.3

1 to 499................................................................. 6.1 0.5 0.4 0.5 1.4

500 to 999............................................................. 27.7 2.7 1.4 2.4 3.4

1,000 to 1,499....................................................... 26.0 1.4 2.2 1.6 2.5

1,500 to 1,999....................................................... 17.6 0.7 1.3 1.4 1.5

2,000 to 2,499....................................................... 10.7 0.5 0.4 0.8 0.8

2,500 to 2,999....................................................... 7.7 0.4 0.4 0.4 0.8

3,000 to 3,499....................................................... 3.8 Q Q Q Q

3,500 to 3,999....................................................... 2.6 Q Q Q Q

4,000 or More........................................................ 5.2 0.4 Q 0.4 Q

Total Number of Rooms

(Excluding Bathrooms)

0............................................................................ 2.1 N Q N 0.9

1 or 2..................................................................... 3.1 0.4 Q Q 0.4

3............................................................................ 8.3 1.3 0.5 0.8 1.1

4............................................................................ 16.6 1.2 1.4 1.1 1.9

5............................................................................ 23.3 1.4 1.8 1.6 2.5

6............................................................................ 22.6 1.1 1.1 1.7 2.2

7............................................................................ 16.3 0.8 0.9 1.3 1.7

8............................................................................ 9.7 0.5 0.6 0.6 0.8

9 or More............................................................... 9.1 0.6 0.4 0.7 0.5

At Home Behavior

Home Used for Business

Yes.................................................................... 8.9 0.5 0.7 0.4 1.0

No...................................................................... 102.2 6.6 6.4 7.6 11.1

Someone Home All Day

Yes.................................................................... 56.4 3.9 3.7 4.1 6.4

No...................................................................... 54.7 3.2 3.3 3.8 5.7

Housing Unit Characteristics Affecting Usage

Adequacy of Insulation

Well Insulated........................................................ 42.8 3.1 2.7 3.0 3.5

Adequately Insulated............................................. 46.3 2.7 3.1 3.1 5.2

Poorly Insulated..................................................... 19.0 1.1 0.9 1.5 2.8

No Insulation......................................................... 1.4 Q Q Q 0.4

Don't Know............................................................ 1.7 Q Q Q Q

Home is Too Drafty During the Winter

Never..................................................................... 62.9 3.6 5.4 5.3 6.5

Some of the Time.................................................. 32.4 2.6 1.0 1.9 3.9

Most of the Time.................................................... 6.1 0.5 Q Q 0.7

All of the Time....................................................... 5.6 Q Q Q 0.8

Don't Know............................................................ 4.1 Q Q 0.3 Q

Housing

Units 

(millions)

 Million U.S. Housing Units

Table HC15.5 Space Heating Usage Indicators by Four Most Populated States, 2005

Space Heating Usage Indicators

Four Most Populated States

New York Florida Texas California

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Housing

Units 

(millions)

 Million U.S. Housing Units

Table HC15.5 Space Heating Usage Indicators by Four Most Populated States, 2005

Space Heating Usage Indicators

Four Most Populated States

New York Florida Texas California

Unusually High Ceilings

Yes........................................................................ 27.2 1.1 1.3 3.1 3.5

No......................................................................... 76.9 5.9 5.3 4.4 8.0

Not Asked (Mobile Homes).................................... 6.9 Q Q 0.5 0.5

Cathedral Ceilings

(In Housing Units with High Ceilings)

Yes.................................................................... 17.1 0.6 1.0 1.9 2.2

No...................................................................... 10.1 0.5 Q 1.2 1.4

Type of Glass in Windows

Single-pane Glass................................................. 50.7 2.2 5.4 5.1 7.6

Double-pane Glass

Without Low-e Coating....................................... 50.6 4.2 1.3 2.5 3.7

With Low-e Coating............................................ 8.0 0.6 Q Q 0.7

Triple-pane Glass

Without Low-e Coating....................................... 1.0 Q N Q Q

With Low-e Coating............................................ 0.3 N N N Q

Proportion of Original Windows Replaced

All.......................................................................... 22.4 2.5 0.9 0.4 2.4

Some..................................................................... 21.6 1.6 0.7 1.4 2.6

None...................................................................... 62.3 2.8 5.0 5.6 6.5

Don't Know............................................................ 4.7 Q 0.3 0.6 0.6

Thermostats

Do Not Have a Thermostat...................................... 15.3 2.2 0.7 1.4 2.3

Have a Thermostat.................................................. 95.8 4.9 6.3 6.6 9.8

1............................................................................ 84.5 3.8 5.9 6.1 9.3

2 or More............................................................... 11.3 1.1 0.4 0.5 0.5

Have a Programmable Thermostat

Yes.................................................................... 33.1 2.0 1.9 2.4 5.3

No...................................................................... 62.7 2.9 4.4 4.2 4.5

Use of Programable Thermostats

Reduces Temperature During Day

Yes.................................................................... 18.6 1.2 0.8 1.4 2.4

No...................................................................... 14.5 0.8 1.1 1.0 2.9

Reduces Temperature at Night

Yes.................................................................... 21.5 1.4 1.0 1.7 3.2

No...................................................................... 11.6 0.6 0.9 0.7 2.1

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Housing

Units 

(millions)

 Million U.S. Housing Units

Table HC15.5 Space Heating Usage Indicators by Four Most Populated States, 2005

Space Heating Usage Indicators

Four Most Populated States

New York Florida Texas California

Winter 2005 Temperature Settings

Lower Temperature Settings

Daytime When No One is at Home

Yes.................................................................... 40.5 2.9 1.3 2.5 3.1

No...................................................................... 59.1 3.6 4.2 4.4 5.7

Unknown............................................................ 11.4 0.6 1.6 1.1 3.3

During Sleeping Hours

Yes.................................................................... 40.7 3.2 1.0 2.3 3.6

No...................................................................... 60.2 3.3 4.5 4.6 5.9

Unknown............................................................ 10.2 0.6 1.5 1.1 2.6

Daytime Setting When No One is at Home

Heat Turned On..................................................... 93.7 6.4 5.2 6.3 5.6

63 Degrees or Less............................................ 18.9 2.0 0.5 0.6 1.5

64 to 66 Degrees............................................... 17.4 1.2 0.5 1.0 1.2

67 to 69 Degrees............................................... 17.8 1.0 0.6 0.9 1.0

70 Degrees........................................................ 16.0 1.3 0.6 1.0 0.8

71 to 73 Degrees............................................... 10.2 0.4 0.8 0.9 0.5

74 Degrees or More........................................... 13.5 0.5 2.1 1.8 0.6

Don't Know/No Answer...................................... 7.4 0.5 0.5 0.9 1.7

Do Not Use Space Heating................................ 1.3 Q Q Q 0.2

Heat Turned Off..................................................... 8.7 Q 1.1 0.7 4.6

Daytime Setting When Someone is at Home

Heat Turned On..................................................... 101.5 6.5 5.5 7.0 9.9

63 Degrees or Less............................................ 4.1 0.6 Q Q 0.5

64 to 66 Degrees............................................... 8.2 0.8 Q Q 0.7

67 to 69 Degrees............................................... 23.6 1.7 0.6 0.9 2.1

70 Degrees........................................................ 24.6 1.9 0.8 1.3 2.5

71 to 73 Degrees............................................... 17.6 0.6 1.0 1.4 1.6

74 Degrees or More........................................... 23.2 0.9 2.8 3.0 2.5

Don't Know/No Answer...................................... 6.0 0.5 0.5 0.8 0.8

Do Not Use Space Heating................................ 1.3 Q Q Q 0.2

Heat Turned Off..................................................... 2.3 Q 0.7 Q 1.2

Setting During Sleeping Hours

Heat Turned On..................................................... 98.1 6.5 5.4 6.8 7.6

63 Degrees or Less............................................ 13.0 1.4 Q 0.4 1.5

64 to 66 Degrees............................................... 18.4 1.6 0.5 0.8 1.2

67 to 69 Degrees............................................... 20.8 1.1 0.6 1.0 1.4

70 Degrees........................................................ 18.5 1.5 1.0 1.4 1.6

71 to 73 Degrees............................................... 11.1 0.3 0.9 1.1 0.7

74 Degrees or More........................................... 16.3 0.6 2.4 2.1 1.2

Don't Know/No Answer...................................... 6.4 0.5 0.5 0.8 1.2

Do Not Use Space Heating................................ 1.3 Q Q Q 0.2

Heat Turned Off..................................................... 5.4 Q 0.9 Q 3.1

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics
Housing

Units 

(millions)

 Million U.S. Housing Units

Table HC15.5 Space Heating Usage Indicators by Four Most Populated States, 2005

Space Heating Usage Indicators

Four Most Populated States

New York Florida Texas California

Secondary Heating

Use Any Secondary Heating Equipment

Yes........................................................................ 34.9 1.2 0.7 2.0 4.1

No......................................................................... 74.9 5.9 6.1 5.9 7.8

Proportion of Heat Provided by

Secondary Heating Equipment

Close to One-Half.............................................. 4.4 Q Q Q 0.7

About One-Quarter............................................ 5.8 Q Q Q 0.7

Very Little or None............................................. 24.7 0.8 0.4 1.5 2.7

Type of Supplemental Heating Equipment Used

Heat Pump............................................................ 0.6 N N N Q

Central Warm-Air Furnace..................................... 2.3 Q Q Q 0.3

Steam/Hot Water System...................................... Q N N N N

Built-in Electric Units............................................. 2.2 Q Q N 0.3

Built-in Pipeless Furnace....................................... 0.3 N N Q Q

Built-in Room Heaters........................................... 1.4 Q N Q N

Heating Stove........................................................ 2.1 Q N Q Q

Portable Electric Heaters....................................... 14.3 0.5 0.4 0.7 1.7

Portable Kerosene Heaters................................... 0.6 N N N N

Cooking Stove....................................................... 0.5 Q N Q Q

Fireplace............................................................... 10.5 Q Q 0.8 1.4

Fireplace Fuel

Wood................................................................. 6.9 Q Q 0.6 1.0

Natural Gas........................................................ 2.7 N Q Q 0.4

Propane............................................................. 0.9 Q Q Q N

Use of Gas Fireplace

During Winter Months

Most Days...................................................... 1.2 N Q Q Q

About Once a Week....................................... 1.3 Q Q Q Q

Less than 4 Times each Month...................... 1.1 N N Q Q

Humidifier Use Each Year

Use a Humidifier....................................................... 14.2 0.7 Q 0.4 0.6

1 to 3 Months Each Year....................................... 7.1 Q N 0.3 0.5

4 to 6 Months Each Year....................................... 5.6 0.3 N N Q

7 to 9 Months Each Year....................................... 0.4 Q N Q N

10 to 11 months..................................................... Q N N N N

Turned on All Year Long........................................ 1.1 Q Q Q Q

Do Not Use a Humidifier............................................ 96.9 6.4 7.0 7.6 11.5

 Q = Data withheld either because the Relative Standard Error (RSE) was greater than 50 percent or fewer than 10 households were 

sampled.

 N = No cases in reporting sample.

 Notes: ● Because of rounding, data may not sum to totals. ● See Glossary for definition of terms used in these tables.

 Source: Energy Information Administration, Office of Energy Markets and End Use, Forms EIA-457 A, B, C of the 2005 

Residential Energy Consumption Survey.

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics