Total............................................................... 111.1 6.1 27.7 26.0 17.6 10.0 7 7.8 11.6

No Main Space Heating Equipment............. 1.2 N N N N N N N

Have Main Space Heating Equipment.......... 109.8 6.1 27.7 26.0 17.6 10.0 7 7.8 11.6

Use Main Space Heating Equipment........... 109.1 6.1 27.7 26.0 17.6 10.0 7 7.8 11.6

Have Equipment But Do Not Use it.............. 0.8 N NNNNNN

Main Space Heating Usage During 2005

Total Number of Rooms

(Excluding Bathrooms)

None........................................................ 2.1 N Q Q NNNN

1 or 2....................................................... 3.1 1.4 1.3 Q N Q N Q

3............................................................... 8.3 1.4 5.6 0.9 Q N N Q

4............................................................... 16.6 1.7 9.0 3.8 1.1 Q Q Q

5............................................................... 23.3 0.8 7.1 8.9 3.4 1.0 3 0.7 0.9

6............................................................... 22.6 0.5 2.7 7.2 5.8 3.0 1.7 1.5

7............................................................... 16.3 Q 1.4 3.4 3.7 3.0 2 1.9 2.5

8............................................................... 9.7 Q 0.4 1.0 2.4 1.0 6 2.0 2.2

9 or More................................................. 9.1 Q 0.2 0.7 1.3 1.0 4 1.3 4.2

At Home Behavior

Home Used for Business

Yes....................................................... 8.9 Q 1.3 1.4 1.6 1.0 4 0.9 2.0

No........................................................ 102.2 5.9 26.5 24.7 16.0 9.0 3 6.8 9.6

Someone Home All Day

Yes....................................................... 56.4 2.8 12.9 14.1 9.2 5.0 4 4.4 5.9

No........................................................ 54.7 3.3 14.9 12.0 8.4 5.0 3 3.4 5.7

Housing Unit Characteristics Affecting Usage

Climate Zone1

Fewer than 2,000 CDD and--

More than 7,000 HDD........................... 10.9 0.2 2.3 1.9 1.9 1.0 3 1.1 2.2

5,500 to 7,000 HDD.............................. 26.1 1.2 6.9 5.3 4.0 2.0 6 2.1 3.4

4,000 to 5,499 HDD.............................. 27.3 1.5 6.5 6.4 4.5 3.0 1.7 3.5

Less than 4,000 HDD........................... 24.0 1.9 6.5 6.1 3.3 1.0 9 1.5 1.4

2000 CDD or More and--

Less than 4,000 HDD............................... 22.8 1.2 5.6 6.4 3.9 1.0 8 1.4 1.1

Adequacy of Insulation

Well Insulated.......................................... 42.8 1.9 9.1 9.1 7.4 4.0 8 3.6 6.3

Adequately Insulated................................ 46.3 2.4 11.0 11.5 7.5 4.0 6 3.4 4.3

Poorly Insulated....................................... 19.0 1.5 6.5 4.8 2.5 1.0 3 0.7 0.9

No Insulation............................................ 1.4 Q 0.4 0.3 Q N Q N

Don't Know............................................... 1.7 Q 0.6 0.4 QQQQ

Home is Too Drafty During the Winter.....

Never....................................................... 62.9 3.2 14.5 14.3 10.3 6.0 5 4.7 7.5

Some of the Time.................................... 32.4 1.7 8.1 7.8 5.5 3.0 0 2.4 3.0

Most of the Time...................................... 6.1 0.4 2.0 1.6 0.8 0.0 4 0.3 0.5

All of the Time.......................................... 5.6 0.5 1.9 1.5 0.7 0.0 5 Q Q

Don't Know............................................... 4.1 0.3 1.4 0.9 0.4 0.0 3 Q 0.4

2,000 to

2,499

2,500 to

2,999

3,000

or More

Table HC1.3 Heated Floorspace Usage Indicators, 2005

Heated Floorspace (square feet)

Fewer

than 500

500 to

999

1,000 to 

1,499

Housing 

Units 

Usage Indicators (millions)

 Million U.S. Housing Units

1,500 to

1,999

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
2,000 to

2,499

2,500 to

2,999

3,000

or More

Table HC1.3 Heated Floorspace Usage Indicators, 2005

Heated Floorspace (square feet)

Fewer

than 500

500 to

999

1,000 to 

1,499

Housing 

Units 

Usage Indicators (millions)

 Million U.S. Housing Units

1,500 to

1,999

Unusually High Ceilings

Yes.......................................................... 27.2 0.7 3.1 4.6 5.2 4.0 3.2 5.8

No............................................................ 76.9 4.9 21.3 19.3 12.1 6.0 5 4.5 5.7

Not Asked (Mobile Homes)...................... 6.9 0.6 3.3 2.1 0.4 Q Q N

Cathedral Ceilings

(In Housing Units with High Ceilings)

Yes....................................................... 17.1 0.3 1.6 2.8 3.3 2.0 9 1.9 4.1

No........................................................ 10.1 0.4 1.5 1.9 1.9 1.0 2 1.3 1.8

Type of Glass in Windows

Single-pane Glass.................................... 50.7 3.9 16.3 12.6 6.9 3.0 5 2.1 2.9

Double-pane Glass

Without Low-e Coating......................... 50.6 2.0 10.5 12.0 8.6 5.0 7 4.5 6.5

With Low-e Coating.............................. 8.0 Q 0.7 1.2 1.7 1.0 3 1.0 1.8

Triple-pane Glass

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

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

Proportion of Original Windows Replaced

All............................................................. 22.4 1.3 4.6 5.6 3.9 2.0 6 1.7 2.5

Some....................................................... 21.6 0.9 4.4 4.8 4.2 2.0 5 1.6 2.5

None........................................................ 62.3 3.3 16.6 14.7 9.0 5.0 4 4.4 6.4

Don't Know............................................... 4.7 0.5 2.1 1.0 0.5 0.0 2 Q Q

Thermostats

Do Not Have a Thermostat.......................... 15.3 2.4 5.7 2.7 1.5 0.0 6 0.3 0.3

Have a Thermostat...................................... 95.8 3.8 22.0 23.3 16.1 10.0 7.5 11.2

1............................................................... 84.5 3.3 20.6 21.5 14.5 8.0 8 5.8 8.4

2 or More................................................. 11.3 0.4 1.5 1.8 1.6 1.0 4 1.7 2.9

Have a Programmable Thermostat..........

Yes....................................................... 33.1 1.1 4.9 6.7 6.3 4.0 2 3.4 6.0

No........................................................ 62.7 2.7 17.1 16.6 9.8 5.0 9 4.1 5.2

Use of Programmable Thermostats

Reduces Temperature During Day

Yes....................................................... 18.6 0.4 2.6 3.7 3.7 2.0 6 1.9 3.6

No........................................................ 14.5 0.7 2.3 3.0 2.6 1.0 6 1.5 2.5

Reduces Temperature at Night

Yes....................................................... 21.5 0.5 2.9 4.4 4.2 3.0 0 2.1 4.1

No........................................................ 11.6 0.6 2.1 2.3 2.1 1.0 3 1.2 1.9

Winter 2005 Temperature Settings

Lower Temperature Settings

Daytime When No One is at Home

Yes....................................................... 40.5 1.4 8.9 9.6 7.3 4.0 6 3.4 4.9

No........................................................ 59.1 3.2 15.3 14.5 9.2 5.0 7 4.0 6.2

Unknown.............................................. 11.4 1.6 3.5 1.9 1.1 0.0 4 Q 0.4

During Sleeping Hours

Yes....................................................... 40.7 1.3 8.1 9.7 7.2 4.0 5 3.7 5.7

No........................................................ 60.2 3.4 16.4 14.7 9.5 5.0 8 3.8 5.6

Unknown.............................................. 10.2 1.4 3.2 1.6 0.9 0.0 3 Q Q

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
2,000 to

2,499

2,500 to

2,999

3,000

or More

Table HC1.3 Heated Floorspace Usage Indicators, 2005

Heated Floorspace (square feet)

Fewer

than 500

500 to

999

1,000 to 

1,499

Housing 

Units 

Usage Indicators (millions)

 Million U.S. Housing Units

1,500 to

1,999

Daytime Setting When No One is at Home

Heat Turned On....................................... 93.7 4.0 22.3 22.3 15.8 9.0 9 7.3 11.0

63 Degrees or Less.............................. 18.9 1.0 4.5 4.4 3.0 2.0 1.3 2.2

64 to 66 Degrees.................................. 17.4 0.6 3.9 3.8 3.6 2.0 0 1.2 2.2

67 to 69 Degrees.................................. 17.8 0.6 3.2 4.2 2.9 1.0 9 2.1 2.7

70 Degrees........................................... 16.0 0.7 4.8 3.6 2.2 1.0 6 1.0 1.9

71 to 73 Degrees.................................. 10.2 Q 2.5 2.7 1.6 1.0 3 0.8 1.1

74 Degrees or More.............................. 13.5 0.8 3.3 3.6 2.5 1.0 0.9 1.1

Don't Know/No Answer......................... 7.4 1.2 2.8 1.4 0.8 0.0 3 Q 0.4

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

Heat Turned Off....................................... 8.7 1.0 2.6 2.3 1.0 0.0 5 0.3 Q

Daytime Setting When Someone is at Home

Heat Turned On....................................... 101.5 4.8 24.9 24.4 16.8 10.0 5 7.5 11.4

63 Degrees or Less.............................. 4.1 0.4 1.4 0.8 0.7 0.0 3 Q 0.3

64 to 66 Degrees.................................. 8.2 0.4 1.9 2.2 1.2 1.0 0.5 1.0

67 to 69 Degrees.................................. 23.6 0.7 4.3 5.1 4.2 2.0 9 2.3 3.9

70 Degrees........................................... 24.6 1.3 6.6 6.0 3.8 2.0 4 1.5 2.6

71 to 73 Degrees.................................. 17.6 0.5 4.0 4.1 3.1 2.0 0 1.7 2.2

74 Degrees or More.............................. 23.2 1.4 6.7 6.3 3.9 1.0 8 1.3 1.5

Don't Know/No Answer......................... 6.0 1.0 2.4 1.3 0.5 Q Q Q

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

Heat Turned Off....................................... 2.3 0.4 0.5 0.4 QQQQ

Setting During Sleeping Hours

Heat Turned On....................................... 98.1 4.5 23.6 23.6 16.4 10.0 2 7.4 11.3

63 Degrees or Less.............................. 13.0 0.6 3.0 2.9 2.3 1.0 3 1.1 1.5

64 to 66 Degrees.................................. 18.4 0.8 3.8 4.3 3.3 2.0 0 1.5 2.7

67 to 69 Degrees.................................. 20.8 0.7 4.1 4.7 3.3 2.0 5 2.0 3.3

70 Degrees........................................... 18.5 0.9 5.7 4.2 2.9 1.0 8 1.1 1.7

71 to 73 Degrees.................................. 11.1 0.4 2.5 2.9 1.8 1.0 5 0.8 1.2

74 Degrees or More.............................. 16.3 1.1 4.6 4.5 2.9 1.0 0.9 0.9

Don't Know/No Answer......................... 6.4 1.0 2.5 1.4 0.6 Q Q Q

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

Heat Turned Off....................................... 5.4 0.7 1.6 1.1 0.6 Q Q Q

Secondary Heating

Use Any Secondary Heating Equipment..

Yes.......................................................... 34.9 1.1 6.7 7.3 6.2 4.0 3 3.1 5.8

No............................................................ 74.9 5.0 21.0 18.7 11.4 6.0 4 4.6 5.8

Proportion of Heat Provided by................

Secondary Heating Equipment.................

Close to One-Half.................................... 4.4 0.2 0.9 1.0 0.8 0.0 5 0.4 0.6

About One-Quarter................................... 5.8 0.3 1.1 1.0 0.9 0.0 8 0.7 0.9

Very Little or None................................... 24.7 0.5 4.7 5.3 4.5 3.0 0 2.1 4.3

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
2,000 to

2,499

2,500 to

2,999

3,000

or More

Table HC1.3 Heated Floorspace Usage Indicators, 2005

Heated Floorspace (square feet)

Fewer

than 500

500 to

999

1,000 to 

1,499

Housing 

Units 

Usage Indicators (millions)

 Million U.S. Housing Units

1,500 to

1,999

Type of Supplemental Heating Equipment Used

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

Central Warm-Air Furnace....................... 2.3 Q 0.5 0.4 0.4 0.0 4 Q 0.4

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

Built-in Electric Units................................ 2.2 Q 0.4 0.4 0.5 0.0 2 Q 0.4

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

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

Heating Stove.......................................... 2.1 N Q 0.4 0.6 0.0 3 Q 0.5

Portable Electric Heaters......................... 14.3 0.8 3.6 3.5 2.1 1.0 4 1.3 1.5

Portable Kerosene Heaters...................... 0.6 N QQQQQQ

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

Fireplace.................................................. 10.5 Q 1.3 1.9 2.1 1.0 7 1.0 2.4

Fireplace Fuel

Wood....................................................... 6.9 Q 1.0 1.2 1.6 1.0 2 0.7 1.1

Natural Gas.............................................. 2.7 N 0.2 0.5 0.4 0.0 5 Q 0.8

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

Use of Gas Fireplace

During Winter Months

Most Days................................................ 1.2 N Q Q Q Q Q 0.5

About Once a Week................................. 1.3 N Q Q Q 0.0 3 Q 0.5

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

Humidifier Use Each Year

Use a Humidifier.......................................... 14.2 0.3 2.7 2.3 2.4 2.0 1.4 2.9

1 to 3 Months Each Year.......................... 7.1 Q 1.5 1.3 1.1 1.0 0 0.7 1.2

4 to 6 Months Each Year.......................... 5.6 Q 1.0 0.8 1.0 0.0 9 0.5 1.3

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

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

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

Do Not Use a Humidifier.............................. 96.9 5.8 25.1 23.7 15.2 8.0 6 6.3 8.6

 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 Tables