Total U.S. Housing Units................................. 111.1 78.1 64.1 4.2 1.8 2.3 5.7

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

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

Use Space Heating Equipment...................... 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

2 to 4 

Units

5 or More 

Units

Mobile 

Homes

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

 OwnerOccupied 

Housing 

Units 

(millions)

Type of Owner-Occupied Housing Unit

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

 OwnerOccupied 

Housing 

Units 

(millions)

Type of Owner-Occupied Housing Unit

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 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 Programmable 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
2 to 4 

Units

5 or More 

Units

Mobile 

Homes

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

 OwnerOccupied 

Housing 

Units 

(millions)

Type of Owner-Occupied Housing Unit

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 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

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

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

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

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

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

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

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

Energy Information Administration

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

Units

5 or More 

Units

Mobile 

Homes

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

 OwnerOccupied 

Housing 

Units 

(millions)

Type of Owner-Occupied Housing Unit

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 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