Total................................................................... 111.1 72.1 7.6 7.8 16.7 6.9

Do Not Have Space Heating Equipment.......... 1.2 0.4 Q Q 0.4 Q

Have Main Space Heating Equipment............. 109.8 71.7 7.5 7.6 16.3 6.8

Use Main Space Heating Equipment............... 109.1 71.5 7.4 7.4 16.0 6.7

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

Main Heating Fuel and Equipment

Natural Gas..................................................... 58.2 39.8 4.9 4.4 7.2 1.9

Central Warm-Air Furnace........................... 44.7 33.1 3.7 2.3 3.9 1.6

For One Housing Unit.............................. 42.9 32.8 3.5 2.0 3.0 1.6

For Two Housing Units............................. 1.8 0.3 Q 0.4 0.9 N

Steam or Hot Water System........................ 8.2 3.4 0.8 1.5 2.5 N

For One Housing Unit.............................. 5.1 3.4 0.6 0.7 0.4 N

For Two Housing Units............................. 3.1 N Q 0.8 2.2 N

Floor, Wall or Pipeless Furnace................... 2.3 1.2 Q 0.3 0.4 Q

Room Heater............................................... 2.0 1.4 Q Q 0.3 Q

Other Equipment......................................... 0.9 0.6 QQQQ

Electricity........................................................ 33.7 18.7 2.1 2.3 7.7 2.9

Built-in Electric Units................................... 5.0 1.8 0.5 0.3 2.3 Q

Central Warm-Air Furnace........................... 16.0 7.9 1.0 1.4 3.9 1.9

For One Housing Unit.............................. 81.5 72.1 7.6 N N 1.9

For Two Housing Units............................. 18.1 N N 1.4 16.7 N

Heat Pump.................................................. 9.2 7.4 0.3 Q 0.7 0.5

Other Equipment......................................... 1.3 0.6 Q Q Q N

Fuel Oil........................................................... 7.7 5.5 0.4 0.8 0.9 0.2

Steam or Hot Water System........................ 4.7 2.9 Q 0.7 0.8 N

For One Housing Unit.............................. 3.3 2.9 Q Q Q N

For Two Housing Units............................. 1.4 Q Q 0.5 0.8 N

Central Warm-Air Furnace........................... 2.8 2.4 Q Q Q 0.2

Other Equipment......................................... Q Q NNNN

Wood.............................................................. 2.9 2.5 Q Q Q 0.3

Heating Stove.............................................. 2.0 1.7 Q Q N Q

Other Equipment......................................... 0.9 0.8 N Q Q Q

Propane/LPG.................................................. 6.0 4.6 Q Q Q 1.3

Central Warm-Air Furnace........................... 4.1 3.2 Q N Q 0.9

Room Heater............................................... 0.9 0.7 N Q N Q

Other Equipment......................................... 0.3 Q N N N Q

Kerosene......................................................... 7.7 5.5 0.4 0.8 0.9 0.2

Other Fuel....................................................... 0.6 0.3 N Q 0.3 Q

Housing Units Served by

Main Heating Equipment

One Housing Unit............................................ 101.0 71.0 7.1 5.4 10.8 6.7

Two or More Housing Units............................. 8.8 0.7 0.4 2.2 5.5 Q

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

Type of Housing Unit

Table HC2.4 Space Heating Characteristics by Type of Housing Unit, 2005

 Million U.S. Housing Units

Space Heating Characteristics Attached 2 to 4 Units 5 or More 

Units

Mobile 

Homes

Apartments in Buildings 

With-- Housing 

Units 

(millions)

Single-Family Units

Detached

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Type of Housing Unit

Table HC2.4 Space Heating Characteristics by Type of Housing Unit, 2005

 Million U.S. Housing Units

Space Heating Characteristics Attached 2 to 4 Units 5 or More 

Units

Mobile 

Homes

Apartments in Buildings 

With-- Housing 

Units 

(millions)

Single-Family Units

Detached

Age of Main Heating Equipment

Used by One Housing Unit

Less than 2 Years....................................... 11.7 8.6 0.8 0.7 0.8 0.8

2 to 4 Years................................................. 13.8 10.1 0.8 0.5 1.2 1.2

5 to 9 Years................................................. 20.6 16.0 1.1 0.7 1.2 1.7

10 to 19 Years............................................. 24.8 18.2 1.8 0.9 2.3 1.7

20 Years or More......................................... 21.5 14.7 1.7 1.1 3.1 0.9

Don't Know.................................................. 8.6 3.5 1.0 1.5 2.2 0.6

Used by Two or More Housing Units

Less than 2 Years....................................... 0.3 QQQQN

2 to 4 Years................................................. 0.4 Q Q Q 0.2 N

5 to 9 Years................................................. 0.6 Q Q Q 0.3 N

10 to 19 Years............................................. 1.1 Q Q Q 0.5 N

20 Years or More......................................... 2.7 Q Q 0.7 1.7 Q

Don't Know.................................................. 3.7 Q Q 1.0 2.5 N

Proportion of Heat Provided by

Main Heating Equipment

All or Almost All.................................................. 100.9 63.6 7.3 7.5 16.1 6.4

About Three-Fourths........................................... 5.8 5.0 Q Q 0.2 0.4

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

Secondary Heating Fuel and Equipment

(More than one may apply)

No................................................................... 76.2 43.2 6.1 6.6 15.1 5.2

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

Natural Gas.............................................. 5.0 4.3 0.3 Q Q Q

Fireplace.............................................. 2.8 2.4 0.2 Q Q N

Room Heater........................................ 0.6 0.6 Q N N N

Central Warm-Air Furnace................... 1.1 1.0 N Q N Q

Other Equipment.................................. 0.4 0.3 N N N Q

Electricity................................................. 19.7 15.5 0.9 0.8 1.4 1.1

Portable Heater.................................... 16.0 12.4 0.8 0.7 1.1 0.9

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

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

Other Equipment.................................. 0.4 0.3 N N Q Q

Fuel Oil.................................................... 0.4 0.4 NNNN

Wood....................................................... 8.9 8.1 Q Q Q 0.3

Fireplace.............................................. 6.7 6.0 QQQQ

Heating Stove....................................... 2.2 2.1 Q N N Q

Other Equipment.................................. Q Q NNNN

Propane/LPG........................................... 2.3 2.2 N N N Q

Kerosene................................................. 2.3 2.2 N N N Q

Other Fuel................................................ 0.2 Q Q N N N

 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
Table HC3.4 Space Heating Characteristics by Owner-Occupied Housing Unit, 2005

 Million U.S. Housing Units

Total................................................................ 111.1 78.1 64.1 4.2 1.8 2.3 5.7

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

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

Use Main Space Heating Equipment............ 109.1 77.2 63.6 4.2 1.8 2.1 5.6

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

Main Heating Fuel and Equipment

Natural Gas.................................................. 58.2 41.8 35.3 2.8 1.2 1.0 1.6

Central Warm-Air Furnace........................ 44.7 34.8 29.7 2.3 0.7 0.6 1.4

For One Housing Unit........................... 42.9 34.3 29.5 2.3 0.6 0.6 1.4

For Two Housing Units.......................... 1.8 0.4 Q N Q Q N

Steam or Hot Water System..................... 8.2 4.2 3.1 0.4 0.5 Q N

For One Housing Unit........................... 5.1 3.8 3.1 0.4 0.3 Q N

For Two Housing Units.......................... 3.1 0.5 N Q Q Q N

Floor, Wall or Pipeless Furnace................ 2.3 1.0 0.8 Q N Q Q

Room Heater............................................ 2.0 1.1 1.0 Q Q N Q

Other Equipment...................................... 0.9 0.6 0.5 N Q N Q

Electricity...................................................... 33.7 21.3 16.5 0.9 0.3 1.1 2.4

Built-in Electric Units................................. 5.0 1.9 1.6 Q N Q Q

Central Warm-Air Furnace........................ 16.0 9.4 6.7 0.4 Q 0.6 1.5

For One Housing Unit........................... 81.5 69.7 64.1 4.2 N N 1.5

For Two Housing Units.......................... 18.1 2.5 N N Q 2.3 N

Heat Pump............................................... 9.2 8.2 7.1 Q Q Q 0.5

Other Equipment...................................... 1.3 0.5 0.4 N N Q N

Fuel Oil......................................................... 7.7 5.8 5.0 0.3 0.3 Q Q

Steam or Hot Water System..................... 4.7 3.1 2.6 Q Q Q N

For One Housing Unit........................... 3.3 2.9 2.6 Q Q N N

For Two Housing Units.......................... 1.4 0.2 QQQQN

Central Warm-Air Furnace........................ 2.8 2.4 2.2 Q Q N Q

Other Equipment...................................... Q Q Q NNNN

Wood........................................................... 2.9 2.6 2.3 Q N N Q

Heating Stove........................................... 2.0 1.7 1.5 Q N N Q

Other Equipment...................................... 0.9 0.8 0.8 N N N Q

Propane/LPG............................................... 6.0 5.2 4.1 Q N Q 1.0

Central Warm-Air Furnace........................ 4.1 3.6 2.8 Q N Q 0.7

Room Heater............................................ 0.9 0.8 0.6 N N N Q

Other Equipment...................................... 0.3 0.3 Q N N N Q

Kerosene...................................................... 7.7 5.8 5.0 0.3 0.3 Q Q

Other Fuel.................................................... 0.6 0.3 0.3 N N N Q

Housing Units Served by

Main Heating Equipment

One Housing Unit......................................... 101.0 76.0 63.2 4.1 1.3 1.8 5.6

Two or More Housing Units.......................... 8.8 1.4 0.5 Q 0.5 0.4 N

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

Single-Family Units Apartments in 

Buildings With--

5 or More 

Units

Mobile 

Homes Space Heating Characteristics Detached Attached 2 to 4 Units

 OwnerOccupied 

Housing 

Units 

(millions)

Type of Owner-Occupied Housing Unit

U.S.

Housing 

Units 

(millions

Energy Information Administration

2005 Resdiential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Table HC3.4 Space Heating Characteristics by Owner-Occupied Housing Unit, 2005

 Million U.S. Housing Units

Single-Family Units Apartments in 

Buildings With--

5 or More 

Units

Mobile 

Homes Space Heating Characteristics Detached Attached 2 to 4 Units

 OwnerOccupied 

Housing 

Units 

(millions)

Type of Owner-Occupied Housing Unit

U.S.

Housing 

Units 

(millions

Age of Main Heating Equipment

Used by One Housing Unit

Less than 2 Years..................................... 11.7 9.1 7.8 0.5 Q Q 0.7

2 to 4 Years.............................................. 13.8 11.1 9.1 0.5 Q Q 1.0

5 to 9 Years.............................................. 20.6 17.5 14.9 0.7 0.3 Q 1.4

10 to 19 Years.......................................... 24.8 20.1 16.5 1.2 0.3 0.7 1.4

20 Years or More...................................... 21.5 15.4 13.0 1.0 0.3 0.5 0.7

Don't Know............................................... 8.6 2.9 2.0 Q Q Q 0.4

Used by Two or More Housing Units

Less than 2 Years..................................... 0.3 Q Q N Q N N

2 to 4 Years.............................................. 0.4 Q Q N Q N N

5 to 9 Years.............................................. 0.6 QQQQNN

10 to 19 Years.......................................... 1.1 0.5 QQQQN

20 Years or More...................................... 2.7 0.5 QQQQN

Don't Know............................................... 3.7 Q N N Q Q N

Proportion of Heat Provided by

Main Heating Equipment

All or Almost All................................................ 100.9 69.6 56.3 3.9 1.8 2.3 5.3

About Three-Fourths........................................ 5.8 5.0 4.6 Q Q N 0.3

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

Secondary Heating Fuel and Equipment

(More than one may apply)

No................................................................ 76.2 48.4 37.4 3.2 1.5 2.2 4.2

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

Natural Gas.............................................. 5.0 4.6 4.1 0.3 Q Q Q

Fireplace............................................... 2.8 2.6 2.3 Q Q Q N

Room Heater......................................... 0.6 0.6 0.6 Q N N N

Central Warm-Air Furnace.................... 1.1 1.0 1.0 N N N Q

Other Equipment................................... 0.4 0.4 0.3 N N N Q

Electricity.................................................. 19.7 15.7 14.0 0.5 0.2 Q 0.9

Portable Heater..................................... 16.0 12.5 11.0 0.4 0.2 Q 0.8

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

Heat Pump............................................ 0.6 0.6 0.6 NNNN

Other Equipment................................... 0.4 0.3 0.3 N N N Q

Fuel Oil..................................................... 0.4 0.4 0.4 NNNN

Wood........................................................ 8.9 8.2 7.6 Q Q Q 0.3

Fireplace............................................... 6.7 6.2 5.7 QQQQ

Heating Stove....................................... 2.2 2.1 2.0 Q N N Q

Other Equipment................................... Q Q Q NNNN

Propane/LPG............................................ 2.3 2.2 2.1 N N N Q

Kerosene.................................................. 2.3 2.2 2.1 N N N Q

Other Fuel................................................. 0.2 0.2 Q Q N N N

 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 Resdiential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Table HC4.4 Space Heating Characteristics by Renter-Occupied Housing Unit, 2005

 Million U.S. Housing Units

Total................................................................ 111.1 33.0 8.0 3.4 5.9 14.4 1.2

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

Have Main Space Heating Equipment.......... 109.8 32.3 8.0 3.3 5.8 14.1 1.1

Use Main Space Heating Equipment............ 109.1 31.8 8.0 3.2 5.6 13.9 1.1

Have Equipment But Do Not Use It.............. 0.8 0.5 N QQQQ

Main Heating Fuel and Equipment

Natural Gas.................................................. 58.2 16.4 4.5 2.1 3.2 6.2 0.3

Central Warm-Air Furnace........................ 44.7 10.0 3.3 1.4 1.6 3.3 0.3

For One Housing Unit........................... 42.9 8.6 3.3 1.2 1.4 2.4 0.3

For Two Housing Units.......................... 1.8 1.4 Q Q 0.2 0.9 N

Steam or Hot Water System..................... 8.2 3.9 0.3 0.4 1.0 2.3 N

For One Housing Unit........................... 5.1 1.3 0.3 0.2 0.5 0.3 N

For Two Housing Units.......................... 3.1 2.6 N Q 0.5 2.0 N

Floor, Wall or Pipeless Furnace................ 2.3 1.3 0.4 Q 0.3 0.4 Q

Room Heater............................................ 2.0 0.9 0.4 Q Q 0.3 Q

Other Equipment...................................... 0.9 0.3 QQQQN

Electricity...................................................... 33.7 12.4 2.2 1.1 1.9 6.6 0.5

Built-in Electric Units................................. 5.0 3.1 0.3 0.3 0.3 2.2 Q

Central Warm-Air Furnace........................ 16.0 6.7 1.3 0.6 1.2 3.2 0.4

For One Housing Unit........................... 81.5 11.8 8.0 3.4 N N 0.4

For Two Housing Units.......................... 18.1 15.6 N N 1.2 14.4 N

Heat Pump............................................... 9.2 0.9 0.3 Q Q 0.4 Q

Other Equipment...................................... 1.3 0.7 QQQQN

Fuel Oil......................................................... 7.7 1.9 0.5 Q 0.5 0.8 Q

Steam or Hot Water System..................... 4.7 1.6 0.3 Q 0.5 0.8 N

For One Housing Unit........................... 3.3 0.4 0.3 Q Q Q N

For Two Housing Units.......................... 1.4 1.1 Q N 0.4 0.7 N

Central Warm-Air Furnace........................ 2.8 0.3 0.2 QQQQ

Other Equipment...................................... Q NNNNNN

Wood........................................................... 2.9 0.3 Q N Q Q Q

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

Other Equipment...................................... 0.9 Q Q N Q Q Q

Propane/LPG............................................... 6.0 0.8 0.5 N Q Q 0.2

Central Warm-Air Furnace........................ 4.1 0.5 0.3 N N Q Q

Room Heater............................................ 0.9 Q Q N Q N Q

Other Equipment...................................... 0.3 Q Q NNNN

Kerosene...................................................... 7.7 1.9 0.5 Q 0.5 0.8 Q

Other Fuel.................................................... 0.6 0.3 N N Q 0.3 N

Housing Units Served by

Main Heating Equipment

One Housing Unit......................................... 101.0 25.0 7.8 3.0 4.1 9.0 1.1

Two or More Housing Units.......................... 8.8 7.4 Q 0.4 1.7 5.1 Q

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

Single-Family Units Apartments in 

Buildings With--

5 or More 

Units

Mobile 

Homes Space Heating Characteristics Detached Attached 2 to 4 Units

 RenterOccupied 

Housing 

Units 

(millions)

Type of Renter-Occupied Housing Unit

U.S.

Housing 

Units 

(millions

Energy Information Administration

2005 Resdiential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Table HC4.4 Space Heating Characteristics by Renter-Occupied Housing Unit, 2005

 Million U.S. Housing Units

Single-Family Units Apartments in 

Buildings With--

5 or More 

Units

Mobile 

Homes Space Heating Characteristics Detached Attached 2 to 4 Units

 RenterOccupied 

Housing 

Units 

(millions)

Type of Renter-Occupied Housing Unit

U.S.

Housing 

Units 

(millions

Age of Main Heating Equipment

Used by One Housing Unit

Less than 2 Years..................................... 11.7 2.5 0.9 0.3 0.6 0.6 Q

2 to 4 Years.............................................. 13.8 2.7 1.0 0.2 0.4 1.0 Q

5 to 9 Years.............................................. 20.6 3.2 1.1 0.3 0.4 1.1 0.3

10 to 19 Years.......................................... 24.8 4.7 1.7 0.6 0.5 1.6 0.2

20 Years or More...................................... 21.5 6.2 1.8 0.7 0.8 2.7 0.2

Don't Know............................................... 8.6 5.7 1.4 0.7 1.4 2.0 Q

Used by Two or More Housing Units

Less than 2 Years..................................... 0.3 0.3 N Q Q Q N

2 to 4 Years.............................................. 0.4 0.3 Q Q Q 0.2 N

5 to 9 Years.............................................. 0.6 0.4 Q N Q 0.3 N

10 to 19 Years.......................................... 1.1 0.6 N Q Q 0.4 N

20 Years or More...................................... 2.7 2.1 Q Q 0.5 1.5 Q

Don't Know............................................... 3.7 3.6 Q Q 0.9 2.5 N

Proportion of Heat Provided by

Main Heating Equipment

All or Almost All................................................ 100.9 31.3 7.3 3.4 5.7 13.8 1.1

About Three-Fourths........................................ 5.8 0.8 0.4 Q Q 0.2 Q

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

Secondary Heating Fuel and Equipment

(More than one may apply)

No................................................................ 76.2 27.8 5.8 2.9 5.1 12.9 1.0

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

Natural Gas.............................................. 5.0 0.4 QQQQN

Fireplace............................................... 2.8 0.2 QQQQN

Room Heater......................................... 0.6 Q Q NNNN

Central Warm-Air Furnace.................... 1.1 Q Q N Q N N

Other Equipment................................... 0.4 NNNNNN

Electricity.................................................. 19.7 4.0 1.5 0.4 0.5 1.3 0.2

Portable Heater..................................... 16.0 3.5 1.4 0.4 0.5 1.1 Q

Built-in Electric Units............................. 2.2 0.4 QQQQQ

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

Other Equipment................................... 0.4 Q N N N Q N

Fuel Oil..................................................... 0.4 NNNNNN

Wood........................................................ 8.9 0.7 0.4 QQQQ

Fireplace............................................... 6.7 0.5 0.3 QQQQ

Heating Stove....................................... 2.2 Q Q NNNN

Other Equipment................................... Q NNNNNN

Propane/LPG............................................ 2.3 Q Q NNNN

Kerosene.................................................. 2.3 Q Q NNNN

Other Fuel................................................. 0.2 NNNNNN

 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 Resdiential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Total................................................................. 111.1 14.7 7.4 12.5 12.5 18.9 18.6 17.3 9.2

Do Not Have Space Heating Equipment........ 1.2 N Q Q 0.2 0.4 0.2 0.2 Q

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

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

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

Main Heating Fuel and Equipment

Natural Gas................................................... 58.2 9.2 4.9 7.8 7.1 8.8 8.4 7.8 4.2

Central Warm-Air Furnace......................... 44.7 5.2 3.1 5.6 5.2 7.1 7.4 7.3 3.9

For One Housing Unit............................. 42.9 4.8 2.9 5.5 5.0 6.8 7.1 7.0 3.8

For Two Housing Units........................... 1.8 0.4 Q Q Q 0.3 0.3 0.3 Q

Steam or Hot Water System...................... 8.2 2.9 0.9 1.1 1.2 1.0 0.5 0.4 Q

For One Housing Unit............................. 5.1 2.1 0.5 0.7 0.8 0.4 0.2 Q Q

For Two Housing Units........................... 3.1 0.8 0.4 0.4 0.4 0.6 0.3 Q Q

Floor, Wall or Pipeless Furnace................. 2.3 0.5 0.3 0.4 0.3 0.3 0.3 Q Q

Room Heater............................................. 2.0 0.2 0.3 0.6 0.4 0.3 Q N Q

Other Equipment........................................ 0.9 0.3 QQQQQQQ

Electricity....................................................... 33.7 1.2 0.9 2.4 3.3 6.9 7.8 7.3 4.0

Built-in Electric Units.................................. 5.0 0.3 Q 0.5 0.8 1.2 1.1 0.6 Q

Central Warm-Air Furnace......................... 16.0 0.4 0.3 0.9 1.3 3.7 3.7 3.7 2.0

For One Housing Unit............................. 81.5 10.8 6.0 10.7 9.2 12.1 12.3 13.2 7.2

For Two Housing Units........................... 18.1 1.4 1.0 1.1 2.2 4.5 3.9 2.5 1.5

Heat Pump................................................. 9.2 Q Q 0.4 0.7 1.4 2.5 2.6 1.4

Other Equipment........................................ 1.3 QQQQQQQQ

Fuel Oil.......................................................... 7.7 2.6 0.9 1.4 0.9 0.9 0.4 0.3 0.2

Steam or Hot Water System...................... 4.7 1.7 0.7 0.8 0.5 0.6 0.2 0.2 Q

For One Housing Unit............................. 3.3 1.1 0.4 0.5 0.4 0.5 Q 0.2 Q

For Two Housing Units........................... 1.4 0.6 0.3 QQQQNN

Central Warm-Air Furnace......................... 2.8 0.9 0.2 0.6 0.3 0.3 0.2 Q Q

Other Equipment........................................ Q N N Q N QQQQ

Wood............................................................. 2.9 0.7 Q 0.3 0.4 0.7 0.4 0.3 Q

Heating Stove............................................ 2.0 0.4 Q Q Q 0.4 0.3 Q Q

Other Equipment........................................ 0.9 QQQQQQQN

Propane/LPG................................................. 6.0 0.8 0.5 0.4 0.3 0.9 1.1 1.4 0.7

Central Warm-Air Furnace......................... 4.1 0.5 Q 0.3 Q 0.5 0.8 1.1 0.6

Room Heater............................................. 0.9 0.2 QQQQQQQ

Other Equipment........................................ 0.3 QQQQQQQN

Kerosene....................................................... 7.7 2.6 0.9 1.4 0.9 0.9 0.4 0.3 0.2

Other Fuel..................................................... 0.6 QQQQQQQQ

Housing Units Served by

Main Heating Equipment

One Housing Unit.......................................... 101.0 12.6 6.5 11.5 11.1 16.9 17.0 16.3 8.9

Two or More Housing Units........................... 8.8 2.0 0.8 0.9 1.1 1.6 1.3 0.8 0.3

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

Table HC5.4 Space Heating Characteristics by Year of Construction, 2005

 Million U.S. Housing Units

Year of Construction

Housing 

Units 

(millions)

Before 

1940

1940 to 

1949

1950 to 

1959

1960 to 

1969

1970 to 

1979

1980 to 

1989

1990 to 

1999

2000 to 

Space Heating Characteristics 2005

Energy Information Administration

2005 Resdiential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Table HC5.4 Space Heating Characteristics by Year of Construction, 2005

 Million U.S. Housing Units

Year of Construction

Housing 

Units 

(millions)

Before 

1940

1940 to 

1949

1950 to 

1959

1960 to 

1969

1970 to 

1979

1980 to 

1989

1990 to 

1999

2000 to 

Space Heating Characteristics 2005

Age of Main Heating Equipment

Used by One Housing Unit

Less than 2 Years...................................... 11.7 1.0 0.7 1.4 1.0 1.5 1.7 0.8 3.6

2 to 4 Years............................................... 13.8 1.4 0.8 1.3 1.3 2.0 1.8 0.7 4.4

5 to 9 Years............................................... 20.6 1.6 1.4 2.0 1.8 3.2 2.0 8.1 0.4

10 to 19 Years........................................... 24.8 2.9 1.3 2.7 2.4 2.8 7.0 5.7 Q

20 Years or More....................................... 21.5 4.3 1.8 3.1 3.3 5.9 3.0 Q Q

Don't Know................................................ 8.6 1.5 0.6 0.9 1.2 1.5 1.6 1.0 0.3

Used by Two or More Housing Units

Less than 2 Years...................................... 0.3 Q N QQQQNQ

2 to 4 Years............................................... 0.4 Q Q N Q Q Q N Q

5 to 9 Years............................................... 0.6 QQQQQQQN

10 to 19 Years........................................... 1.1 QQQQQQQN

20 Years or More....................................... 2.7 0.6 Q 0.4 0.4 0.5 0.5 N N

Don't Know................................................ 3.7 0.9 0.5 0.3 0.4 0.8 0.4 0.3 Q

Proportion of Heat Provided by

Main Heating Equipment

All or Almost All................................................. 100.9 13.2 6.7 11.4 11.1 17.3 16.9 15.8 8.5

About Three-Fourths......................................... 5.8 1.0 0.4 0.6 0.6 0.9 1.0 0.9 0.4

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

Secondary Heating Fuel and Equipment

(More than one may apply)

No................................................................. 76.2 9.6 4.9 9.0 8.5 13.4 12.7 11.5 6.7

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

Natural Gas............................................... 5.0 0.5 0.4 0.5 0.5 0.5 0.8 1.2 0.7

Fireplace................................................ 2.8 Q Q Q Q Q 0.6 0.9 0.5

Room Heater.......................................... 0.6 QQQQQQQQ

Central Warm-Air Furnace..................... 1.1 QQQQQQQQ

Other Equipment.................................... 0.4 QQQQQQQN

Electricity................................................... 19.7 3.3 1.8 2.1 2.4 3.1 3.1 2.7 1.2

Portable Heater...................................... 16.0 2.9 1.6 1.8 2.0 2.4 2.4 2.0 0.9

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

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

Other Equipment.................................... 0.4 N N N QQQQQ

Fuel Oil...................................................... 0.4 QQQQQQQN

Wood......................................................... 8.9 1.1 0.4 0.7 0.8 1.5 1.8 2.0 0.6

Fireplace................................................ 6.7 0.7 0.3 0.4 0.6 1.1 1.4 1.7 0.5

Heating Stove........................................ 2.2 0.4 Q 0.3 Q 0.4 0.4 0.3 Q

Other Equipment.................................... Q Q NNNNQQN

Propane/LPG............................................. 2.3 0.4 Q Q Q 0.4 0.4 0.6 0.3

Kerosene................................................... 2.3 0.4 Q Q Q 0.4 0.4 0.6 0.3

Other Fuel.................................................. 0.2 Q N Q Q Q N Q N

 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 Resdiential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Table HC6.4 Space Heating Characteristics by Number of Household Members, 2005

Total..................................................................... 111.1 30.0 34.8 18.4 15.9 12.0

Do Not Have Space Heating Equipment............ 1.2 0.3 0.3 Q 0.2 0.2

Have Main Space Heating Equipment............... 109.8 29.7 34.5 18.2 15.6 11.8

Use Main Space Heating Equipment................. 109.1 29.5 34.4 18.1 15.5 11.6

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

Main Heating Fuel and Equipment

Natural Gas....................................................... 58.2 15.6 18.0 9.5 8.4 6.7

Central Warm-Air Furnace............................. 44.7 10.7 14.3 7.6 6.9 5.2

For One Housing Unit................................ 42.9 10.1 13.8 7.3 6.5 5.2

For Two Housing Units............................... 1.8 0.6 0.5 0.4 0.3 Q

Steam or Hot Water System.......................... 8.2 3.0 2.3 1.0 1.0 0.9

For One Housing Unit................................ 5.1 1.4 1.6 0.6 0.7 0.7

For Two Housing Units............................... 3.1 1.5 0.7 0.3 0.3 Q

Floor, Wall or Pipeless Furnace..................... 2.3 0.9 0.6 0.4 Q 0.2

Room Heater................................................. 2.0 0.7 0.5 0.3 0.3 0.2

Other Equipment........................................... 0.9 0.3 0.2 0.2 Q Q

Electricity.......................................................... 33.7 9.9 10.1 5.4 4.7 3.5

Built-in Electric Units...................................... 5.0 1.9 1.7 0.7 0.4 0.4

Central Warm-Air Furnace............................. 16.0 4.8 4.0 2.8 2.5 1.9

For One Housing Unit................................ 81.5 17.8 27.2 13.8 12.7 10.1

For Two Housing Units............................... 18.1 8.4 4.6 2.5 1.7 0.9

Heat Pump.................................................... 9.2 2.2 3.6 1.5 1.2 0.7

Other Equipment........................................... 1.3 QQQQQ

Fuel Oil............................................................. 7.7 2.0 2.5 1.6 1.0 0.7

Steam or Hot Water System.......................... 4.7 1.4 1.3 0.9 0.5 0.5

For One Housing Unit................................ 3.3 0.9 1.0 0.7 0.4 0.4

For Two Housing Units............................... 1.4 0.5 0.3 0.3 Q Q

Central Warm-Air Furnace............................. 2.8 0.6 1.0 0.6 0.4 0.2

Other Equipment........................................... Q N Q Q Q N

Wood................................................................ 2.9 0.4 1.1 0.6 0.5 0.2

Heating Stove................................................ 2.0 0.3 0.8 0.4 0.3 Q

Other Equipment........................................... 0.9 Q 0.3 Q Q Q

Propane/LPG.................................................... 6.0 1.3 2.5 0.9 0.9 0.5

Central Warm-Air Furnace............................. 4.1 0.8 1.7 0.7 0.6 0.4

Room Heater................................................. 0.9 0.2 0.3 Q Q Q

Other Equipment........................................... 0.3 QQQQQ

Kerosene........................................................... 7.7 2.0 2.5 1.6 1.0 0.7

Other Fuel......................................................... 0.6 Q 0.3 Q Q Q

Housing Units Served by

Main Heating Equipment

One Housing Unit.............................................. 101.0 26.2 32.3 16.7 14.5 11.3

Two or More Housing Units............................... 8.8 3.6 2.2 1.5 1.1 0.5

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

4

 Members

5 or More 

Space Heating Characteristics Members

 Million U.S. Housing Units

Number of Households With --

Housing 

Units 

(millions)

1

 Member

2

 Members

3

 Members

Energy Information Administration

2005 Resdiential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Table HC6.4 Space Heating Characteristics by Number of Household Members, 2005

4

 Members

5 or More 

Space Heating Characteristics Members

 Million U.S. Housing Units

Number of Households With --

Housing 

Units 

(millions)

1

 Member

2

 Members

3

 Members

Age of Main Heating Equipment

Used by One Housing Unit

Less than 2 Years.......................................... 11.7 2.6 3.8 2.1 1.5 1.6

2 to 4 Years................................................... 13.8 3.0 4.6 2.4 2.3 1.4

5 to 9 Years................................................... 20.6 4.2 7.1 3.5 3.3 2.5

10 to 19 Years............................................... 24.8 7.0 7.8 4.1 3.7 2.2

20 Years or More........................................... 21.5 7.0 7.0 3.0 2.4 2.1

Don’t' Know................................................... 8.6 2.3 2.1 1.5 1.3 1.4

Used by Two or More Housing Units

Less than 2 Years.......................................... 0.3 Q Q N Q N

2 to 4 Years................................................... 0.4 QQQQQ

5 to 9 Years................................................... 0.6 QQQQQ

10 to 19 Years............................................... 1.1 Q 0.4 0.3 Q Q

20 Years or More........................................... 2.7 1.2 0.6 0.3 0.3 Q

Don't Know.................................................... 3.7 1.7 0.8 0.6 0.4 0.2

Proportion of Heat Provided by

Main Heating Equipment

All or Almost All.................................................... 100.9 27.8 31.6 16.1 14.5 10.9

About Three-Fourths............................................. 5.8 1.4 1.8 1.2 0.8 0.6

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

Secondary Heating Fuel and Equipment

(More than one may apply)

No..................................................................... 76.2 22.6 22.4 11.6 10.8 8.8

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

Natural Gas................................................... 5.0 0.7 2.2 0.9 0.7 0.5

Fireplace.................................................... 2.8 0.4 1.2 0.5 0.4 0.3

Room Heater............................................. 0.6 Q 0.3 Q Q Q

Central Warm-Air Furnace......................... 1.1 Q 0.4 Q Q Q

Other Equipment........................................ 0.4 Q Q Q N Q

Electricity....................................................... 19.7 4.7 6.3 3.8 3.0 1.9

Portable Heater.......................................... 16.0 3.9 5.1 3.0 2.3 1.6

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

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

Other Equipment........................................ 0.4 Q Q Q N Q

Fuel Oil.......................................................... 0.4 Q 0.3 N Q Q

Wood............................................................. 8.9 1.6 3.4 1.9 1.5 0.6

Fireplace.................................................... 6.7 1.2 2.5 1.5 1.2 0.5

Heating Stove............................................ 2.2 0.4 0.9 0.5 0.3 Q

Other Equipment........................................ Q N Q N Q N

Propane/LPG................................................. 2.3 0.4 1.0 0.4 0.4 Q

Kerosene....................................................... 2.3 0.4 1.0 0.4 0.4 Q

Other Fuel..................................................... 0.2 Q Q Q N N

 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 Resdiential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Total................................................................ 111.1 26.7 28.8 20.6 13.1 22.0 16.6 38.6

Do Not Have Space Heating Equipment....... 1.2 0.5 0.3 0.2 Q 0.2 0.3 0.6

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

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

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

Main Heating Fuel and Equipment

Natural Gas.................................................. 58.2 12.2 14.4 11.3 7.1 13.2 7.6 18.3

Central Warm-Air Furnace........................ 44.7 7.5 10.8 9.3 5.6 11.4 4.6 12.0

For One Housing Unit........................... 42.9 6.9 10.3 9.1 5.4 11.3 4.1 11.0

For Two Housing Units......................... 1.8 0.6 0.6 Q Q Q 0.4 0.9

Steam or Hot Water System..................... 8.2 2.4 2.5 1.0 1.0 1.3 1.5 3.6

For One Housing Unit........................... 5.1 0.9 1.5 0.8 0.8 1.1 0.6 1.8

For Two Housing Units......................... 3.1 1.5 1.0 Q Q 0.2 0.9 1.8

Floor, Wall or Pipeless Furnace............... 2.3 0.9 0.4 0.4 Q 0.3 0.6 1.0

Room Heater............................................ 2.0 0.9 0.4 0.5 Q Q 0.6 1.1

Other Equipment...................................... 0.9 0.4 0.2 Q Q Q 0.3 0.5

Electricity..................................................... 33.7 8.9 9.4 6.1 3.7 5.6 5.6 12.5

Built-in Electric Units................................ 5.0 1.8 1.4 0.8 0.4 0.6 1.0 2.4

Central Warm-Air Furnace........................ 16.0 4.7 4.7 2.9 1.5 2.3 3.2 6.5

For One Housing Unit........................... 81.5 14.2 19.8 16.5 11.2 19.8 8.4 22.6

For Two Housing Units......................... 18.1 7.7 5.2 2.6 1.2 1.5 5.0 9.7

Heat Pump............................................... 9.2 1.2 2.2 2.0 1.3 2.4 0.6 1.9

Other Equipment...................................... 1.3 Q Q Q 0.5 Q Q Q

Fuel Oil........................................................ 7.7 2.2 1.7 1.3 0.9 1.6 1.2 3.0

Steam or Hot Water System..................... 4.7 1.5 1.0 0.7 0.6 0.9 0.9 1.9

For One Housing Unit........................... 3.3 0.7 0.7 0.5 0.6 0.8 0.3 1.0

For Two Housing Units......................... 1.4 0.8 0.3 Q Q Q 0.6 0.9

Central Warm-Air Furnace........................ 2.8 0.6 0.7 0.6 0.3 0.6 0.3 1.0

Other Equipment...................................... Q N Q N Q Q N Q

Wood........................................................... 2.9 0.7 0.9 0.5 0.4 0.4 0.7 1.2

Heating Stove........................................... 2.0 0.5 0.6 0.3 Q 0.3 0.5 0.8

Other Equipment...................................... 0.9 Q 0.3 Q Q Q Q 0.4

Propane/LPG............................................... 6.0 1.4 1.7 1.1 0.9 0.9 0.9 2.0

Central Warm-Air Furnace........................ 4.1 0.7 1.1 0.9 0.7 0.8 0.4 1.0

Room Heater............................................ 0.9 0.4 Q Q Q N 0.3 0.6

Other Equipment...................................... 0.3 Q Q Q Q QQ Q

Kerosene..................................................... 7.7 2.2 1.7 1.3 0.9 1.6 1.2 3.0

Other Fuel.................................................... 0.6 Q Q Q Q QQ Q

Housing Units Served by

Main Heating Equipment

One Housing Unit......................................... 101.0 22.3 25.7 19.4 12.4 21.2 13.7 32.8

Two or More Housing Units.......................... 8.8 3.9 2.7 1.0 0.6 0.6 2.6 5.1

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

Housing 

Units 

(millions)

Less than 

$20,000

$20,000 to 

$39,999

$40,000 to 

$59,999

$60,000 to 

$79,999

Table HC7.4 Space Heating Characteristics by Household Income, 2005

Below 

Poverty 

Line

Eligible for 

Federal 

Assistance $80,000 or 1

Space Heating Characteristics More

 Million U.S. Housing Units

2005 Household Income

Energy Information Administration

2005 Resdiential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Housing 

Units 

(millions)

Less than 

$20,000

$20,000 to 

$39,999

$40,000 to 

$59,999

$60,000 to 

$79,999

Table HC7.4 Space Heating Characteristics by Household Income, 2005

Below 

Poverty 

Line

Eligible for 

Federal 

Assistance $80,000 or 1

Space Heating Characteristics More

 Million U.S. Housing Units

2005 Household Income

Age of Main Heating Equipment

Used by One Housing Unit

Less than 2 Years.................................... 11.7 2.4 2.7 1.9 1.6 3.0 1.4 3.6

2 to 4 Years.............................................. 13.8 2.7 3.4 2.9 1.7 3.1 1.8 4.1

5 to 9 Years.............................................. 20.6 3.5 4.9 4.3 3.0 5.0 2.0 5.3

10 to 19 Years.......................................... 24.8 4.8 6.0 5.1 3.1 5.8 2.6 7.0

20 Years or More...................................... 21.5 5.7 6.3 4.2 2.1 3.2 3.5 8.3

Don't Know............................................... 8.6 3.3 2.4 1.0 0.9 1.1 2.3 4.5

Used by Two or More Housing Units

Less than 2 Years.................................... 0.3 Q Q Q Q NQ Q

2 to 4 Years.............................................. 0.4 Q 0.3 Q N Q Q Q

5 to 9 Years.............................................. 0.6 Q Q Q Q Q Q 0.2

10 to 19 Years.......................................... 1.1 Q 0.3 Q Q Q Q 0.4

20 Years or More...................................... 2.7 1.3 0.7 Q Q 0.2 1.0 1.6

Don't Know............................................... 3.7 2.0 1.2 0.3 Q Q 1.2 2.6

Proportion of Heat Provided by

Main Heating Equipment

All or Almost All............................................... 100.9 25.0 26.3 18.9 11.4 19.3 15.3 35.9

About Three-Fourths........................................ 5.8 0.9 1.4 1.0 1.2 1.5 0.8 1.4

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

Secondary Heating Fuel and Equipment

(More than one may apply)

No................................................................ 76.2 20.8 20.4 14.0 8.6 12.4 13.0 29.5

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

Natural Gas.............................................. 5.0 0.4 1.1 0.7 0.7 2.2 0.2 0.7

Fireplace............................................... 2.8 Q 0.4 0.4 0.5 1.4 Q Q

Room Heater........................................ 0.6 Q Q Q Q QQ Q

Central Warm-Air Furnace.................... 1.1 Q 0.3 Q Q 0.4 Q 0.3

Other Equipment................................... 0.4 N Q Q N Q N N

Electricity.................................................. 19.7 4.0 5.0 3.7 2.5 4.6 2.6 5.8

Portable Heater..................................... 16.0 3.4 4.1 3.3 1.8 3.4 2.2 5.0

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

Heat Pump............................................ 0.6 Q Q Q Q 0.5 Q Q

Other Equipment................................... 0.4 Q Q Q Q QQ Q

Fuel Oil..................................................... 0.4 Q Q Q Q QN Q

Wood........................................................ 8.9 1.1 1.8 1.9 1.2 2.9 0.5 1.8

Fireplace............................................... 6.7 0.9 1.2 1.5 0.9 2.2 0.3 1.2

Heating Stove....................................... 2.2 0.2 0.6 0.5 0.3 0.7 0.1 0.5

Other Equipment................................... Q N N Q N Q N N

Propane/LPG............................................ 2.3 0.3 0.5 0.5 0.3 0.7 Q 0.5

Kerosene.................................................. 2.3 0.3 0.5 0.5 0.3 0.7 Q 0.5

Other Fuel................................................ 0.2 Q Q N Q Q N Q

 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 Resdiential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Total........................................................................ 111.1 47.1 19.0 22.7 22.3

Do Not Have Space Heating Equipment............... 1.2 0.7 Q 0.2 Q

Have Main Space Heating Equipment.................. 109.8 46.3 18.9 22.5 22.1

Use Main Space Heating Equipment.................... 109.1 45.6 18.8 22.5 22.1

Have Equipment But Do Not Use It...................... 0.8 0.7 Q N N

Main Heating Fuel and Equipment

Natural Gas.......................................................... 58.2 27.0 11.9 14.9 4.3

Central Warm-Air Furnace................................ 44.7 19.8 8.6 12.8 3.6

For One Housing Unit................................... 42.9 18.8 8.3 12.3 3.5

For Two Housing Units................................. 1.8 1.0 0.3 0.4 Q

Steam or Hot Water System............................. 8.2 4.4 2.1 1.4 0.3

For One Housing Unit................................... 5.1 2.1 1.6 1.0 0.3

For Two Housing Units................................. 3.1 2.2 0.5 Q N

Floor, Wall or Pipeless Furnace....................... 2.3 1.2 0.5 0.4 Q

Room Heater.................................................... 2.0 1.1 0.5 Q Q

Other Equipment.............................................. 0.9 0.4 0.3 Q Q

Electricity............................................................. 33.7 15.9 4.6 5.8 7.4

Built-in Electric Units........................................ 5.0 2.5 0.8 0.9 0.9

Central Warm-Air Furnace................................ 16.0 7.9 2.7 2.3 3.2

For One Housing Unit................................... 81.5 29.4 14.4 18.7 19.1

For Two Housing Units................................. 18.1 11.9 3.0 2.8 0.4

Heat Pump....................................................... 9.2 3.4 0.8 2.2 2.7

Other Equipment.............................................. 1.3 0.8 Q Q Q

Fuel Oil................................................................ 7.7 2.4 1.7 1.2 2.4

Steam or Hot Water System............................. 4.7 1.8 0.9 0.8 1.2

For One Housing Unit................................... 3.3 0.8 0.7 0.7 1.0

For Two Housing Units................................. 1.4 1.0 Q Q Q

Central Warm-Air Furnace................................ 2.8 0.6 0.7 0.5 1.0

Other Equipment.............................................. Q Q Q N Q

Wood................................................................... 2.9 0.3 Q Q 2.3

Heating Stove................................................... 2.0 Q Q Q 1.5

Other Equipment.............................................. 0.9 Q Q N 0.7

Propane/LPG....................................................... 6.0 0.3 0.2 0.3 5.2

Central Warm-Air Furnace................................ 4.1 Q Q Q 3.7

Room Heater.................................................... 0.9 Q Q Q 0.7

Other Equipment.............................................. 0.3 Q Q N 0.3

Kerosene............................................................. 7.7 2.4 1.7 1.2 2.4

Other Fuel............................................................ 0.6 0.3 Q Q Q

Housing Units Served by

Main Heating Equipment

One Housing Unit................................................. 101.0 40.5 17.6 21.2 21.7

Two or More Housing Units.................................. 8.8 5.8 1.3 1.3 0.4

Do Not Have Heating Equipment......................... 1.2 0.7 Q 0.2 Q

Table HC8.4 Space Heating Characteristics by Urban/Rural Location, 2005

Space Heating Characteristics

 Million U.S. Housing Units

Housing

Units 

(millions)

Urban/Rural Location

(as Self-Reported)

City Town Surburbs Rural

Energy Information Administration

2005 Resdiential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Table HC8.4 Space Heating Characteristics by Urban/Rural Location, 2005

Space Heating Characteristics

 Million U.S. Housing Units

Housing

Units 

(millions)

Urban/Rural Location

(as Self-Reported)

City Town Surburbs Rural

Age of Main Heating Equipment

Used by One Housing Unit

Less than 2 Years............................................ 11.7 4.6 2.0 2.5 2.6

2 to 4 Years...................................................... 13.8 5.1 2.6 3.0 3.1

5 to 9 Years...................................................... 20.6 7.2 3.5 4.4 5.5

10 to 19 Years.................................................. 24.8 9.1 3.7 6.1 6.0

20 Years or More.............................................. 21.5 9.9 4.0 4.0 3.6

Don't Know....................................................... 8.6 4.6 1.8 1.2 1.0

Used by Two or More Housing Units

Less than 2 Years............................................ 0.3 Q Q Q N

2 to 4 Years...................................................... 0.4 0.2 Q Q Q

5 to 9 Years...................................................... 0.6 0.3 Q Q Q

10 to 19 Years.................................................. 1.1 0.5 Q Q Q

20 Years or More.............................................. 2.7 2.1 0.3 Q Q

Don't Know....................................................... 3.7 2.5 0.6 Q Q

Proportion of Heat Provided by

Main Heating Equipment

All or Almost All....................................................... 100.9 44.0 17.4 20.8 18.7

About Three-Fourths................................................ 5.8 1.7 0.9 1.1 2.2

Closer to One-Half................................................... 4.4 1.5 0.7 0.7 1.5

Secondary Heating Fuel and Equipment

(More than one may apply)

No........................................................................ 76.2 35.4 13.9 15.3 11.6

Yes...................................................................... 34.9 11.7 5.1 7.3 10.8

Natural Gas...................................................... 5.0 1.8 0.7 1.7 0.7

Fireplace....................................................... 2.8 1.0 0.3 1.1 0.4

Room Heater................................................ 0.6 QQQQ

Central Warm-Air Furnace............................ 1.1 0.4 Q 0.3 Q

Other Equipment.......................................... 0.4 QQQQ

Electricity.......................................................... 19.7 7.5 3.0 4.0 5.2

Portable Heater............................................. 16.0 6.2 2.6 3.3 3.8

Built-in Electric Units..................................... 2.2 0.8 Q 0.5 0.7

Heat Pump................................................... 0.6 Q Q Q 0.3

Other Equipment.......................................... 0.4 Q N Q Q

Fuel Oil............................................................. 0.4 N Q Q Q

Wood............................................................... 8.9 2.6 1.2 1.6 3.4

Fireplace....................................................... 6.7 2.3 1.0 1.4 2.0

Heating Stove............................................... 2.2 0.3 0.3 0.3 1.3

Other Equipment.......................................... Q Q Q N Q

Propane/LPG................................................... 2.3 Q Q 0.3 1.8

Kerosene.......................................................... 2.3 Q Q 0.3 1.8

Other Fuel........................................................ 0.2 QQQQ

 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 Resdiential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Table HC9.4 Space Heating Characteristics by Climate Zone, 2005

 Million U.S. Housing Units

Total......................................................................... 111.1 10.9 26.1 27.3 24.0 22.8

Do Not Have Space Heating Equipment................ 1.2 Q Q N 0.3 0.8

Have Main Space Heating Equipment.................... 109.8 10.9 26.0 27.3 23.7 22.0

Use Main Space Heating Equipment..................... 109.1 10.9 26.0 27.3 23.2 21.7

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

Main Heating Fuel and Equipment

Natural Gas........................................................... 58.2 6.2 17.6 14.9 12.6 6.9

Central Warm-Air Furnace................................. 44.7 5.0 13.4 11.0 9.8 5.5

For One Housing Unit..................................... 42.9 4.9 12.4 10.5 9.7 5.4

For Two Housing Units................................... 1.8 Q 0.9 0.5 Q Q

Steam or Hot Water System.............................. 8.2 1.0 3.3 3.3 0.3 Q

For One Housing Unit..................................... 5.1 0.7 2.3 1.9 Q Q

For Two Housing Units................................... 3.1 0.3 1.0 1.4 Q Q

Floor, Wall or Pipeless Furnace......................... 2.3 Q 0.6 0.3 1.4 Q

Room Heater...................................................... 2.0 Q Q Q 0.8 0.8

Other Equipment................................................ 0.9 Q 0.2 Q 0.3 0.3

Electricity............................................................... 33.7 1.0 3.3 7.1 8.1 14.1

Built-in Electric Units.......................................... 5.0 0.6 1.1 2.0 0.9 0.4

Central Warm-Air Furnace................................. 16.0 0.3 1.3 2.0 4.7 7.6

For One Housing Unit..................................... 81.5 8.9 18.8 19.3 17.4 17.1

For Two Housing Units................................... 18.1 1.0 4.1 4.8 4.0 4.3

Heat Pump......................................................... 9.2 Q 0.4 2.7 1.8 4.2

Other Equipment................................................ 1.3 N Q Q N 1.1

Fuel Oil.................................................................. 7.7 1.5 2.9 3.1 Q N

Steam or Hot Water System.............................. 4.7 0.8 1.7 2.1 Q N

For One Housing Unit..................................... 3.3 Q 1.5 1.2 N N

For Two Housing Units................................... 1.4 Q 0.3 0.9 Q N

Central Warm-Air Furnace................................. 2.8 0.7 1.1 0.9 Q N

Other Equipment................................................ Q N Q N N N

Wood..................................................................... 2.9 0.7 0.4 0.8 0.6 0.4

Heating Stove.................................................... 2.0 0.4 0.3 0.6 0.5 Q

Other Equipment................................................ 0.9 Q Q Q Q Q

Propane/LPG......................................................... 6.0 1.3 1.2 1.0 1.9 0.6

Central Warm-Air Furnace................................. 4.1 1.0 1.0 0.8 1.1 0.2

Room Heater...................................................... 0.9 Q Q Q 0.4 Q

Other Equipment................................................ 0.3 Q Q Q Q Q

Kerosene............................................................... 7.7 1.5 2.9 3.1 Q N

Other Fuel.............................................................. 0.6 Q Q Q Q N

Housing Units Served by

Main Heating Equipment

One Housing Unit.................................................. 101.0 10.2 23.1 23.6 23.0 21.0

Two or More Housing Units.................................... 8.8 0.7 2.9 3.7 0.7 1.0

Do Not Have Heating Equipment........................... 1.2 Q Q N 0.3 0.8

Climate Zone1

Space Heating Characteristics

2,000 CDD 

or More

and Less 

than 4,000 

HDD

Less than 2,000 CDD and --

Less than 

4,000 HDD

Greater than 

7,000 HDD

5,500 to 

7,000 HDD

4,000 to 

5,499 HDD

Housing 

Units 

(millions)

Energy Information Administration

2005 Resdiential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Table HC9.4 Space Heating Characteristics by Climate Zone, 2005

 Million U.S. Housing Units

Climate Zone1

Space Heating Characteristics

2,000 CDD 

or More

and Less 

than 4,000 

HDD

Less than 2,000 CDD and --

Less than 

4,000 HDD

Greater than 

7,000 HDD

5,500 to 

7,000 HDD

4,000 to 

5,499 HDD

Housing 

Units 

(millions)

Age of Main Heating Equipment

Used by One Housing Unit

Less than 2 Years.............................................. 11.7 1.1 2.5 2.5 2.7 2.8

2 to 4 Years....................................................... 13.8 1.4 2.9 2.6 3.0 3.9

5 to 9 Years....................................................... 20.6 2.2 4.4 4.5 4.6 4.9

10 to 19 Years.................................................... 24.8 3.2 5.2 6.0 5.6 4.7

20 Years or More............................................... 21.5 1.9 5.5 5.6 5.4 3.2

Don't Know......................................................... 8.6 0.5 2.6 2.4 1.7 1.5

Used by Two or More Housing Units

Less than 2 Years.............................................. 0.3 Q Q Q Q Q

2 to 4 Years....................................................... 0.4 Q Q Q Q Q

5 to 9 Years....................................................... 0.6 Q Q Q Q Q

10 to 19 Years.................................................... 1.1 Q 0.3 0.4 Q Q

20 Years or More............................................... 2.7 Q 0.7 1.2 0.3 0.3

Don't Know......................................................... 3.7 0.3 1.3 1.7 Q Q

Proportion of Heat Provided by

Main Heating Equipment

All or Almost All......................................................... 100.9 9.6 23.8 24.8 21.3 21.5

About Three-Fourths................................................. 5.8 0.9 1.3 1.4 1.5 0.8

Closer to One-Half..................................................... 4.4 0.5 1.1 1.1 1.2 0.5

Secondary Heating Fuel and Equipment

(More than one may apply)

No.......................................................................... 76.2 6.4 18.1 18.6 15.2 17.9

Yes........................................................................ 34.9 4.6 8.0 8.7 8.8 4.9

Natural Gas........................................................ 5.0 0.8 1.2 0.9 1.5 0.6

Fireplace........................................................ 2.8 0.5 0.7 0.4 0.8 0.3

Room Heater.................................................. 0.6 Q Q Q Q Q

Central Warm-Air Furnace.............................. 1.1 Q Q 0.3 0.4 Q

Other Equipment............................................ 0.4 Q Q Q Q N

Electricity........................................................... 19.7 1.8 4.6 5.3 5.1 2.9

Portable Heater.............................................. 16.0 1.1 3.9 4.1 4.4 2.4

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

Heat Pump..................................................... 0.6 Q Q 0.3 Q Q

Other Equipment............................................ 0.4 Q Q Q Q Q

Fuel Oil.............................................................. 0.4 Q Q Q N N

Wood................................................................. 8.9 1.5 1.6 2.0 2.3 1.4

Fireplace........................................................ 6.7 0.9 0.9 1.6 2.0 1.3

Heating Stove................................................. 2.2 0.5 0.8 0.5 0.4 Q

Other Equipment............................................ Q Q Q Q N N

Propane/LPG..................................................... 2.3 0.3 0.6 0.7 0.5 Q

Kerosene........................................................... 2.3 0.3 0.6 0.7 0.5 Q

Other Fuel.......................................................... 0.2 Q Q Q N N

 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 Resdiential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Total........................................................................ 0.0 0.0 0.0 0.0 0.0

Do Not Have Space Heating Equipment............... 12.4 73.1 98.4 27.9 12.3

Have Main Space Heating Equipment.................. 0.2 0.2 0.2 0.3 0.4

Use Main Space Heating Equipment.................... 0.2 0.2 0.2 0.4 0.7

Have Equipment But Do Not Use It...................... 20.4 0.0 0.0 62.3 18.5

Main Heating Fuel and Equipment

Natural Gas.......................................................... 3.0 10.4 3.4 7.0 4.6

Central Warm-Air Furnace................................ 3.4 13.9 4.2 8.6 5.2

For One Housing Unit................................... 3.5 14.2 5.0 8.7 5.1

For Two Housing Units................................. 20.1 30.2 37.7 51.8 40.8

Steam or Hot Water System............................. 9.3 13.7 13.8 23.5 24.4

For One Housing Unit................................... 12.5 17.7 18.6 39.7 29.1

For Two Housing Units................................. 12.9 15.6 38.5 29.2 55.0

Floor, Wall or Pipeless Furnace....................... 10.4 49.9 43.4 41.1 9.8

Room Heater.................................................... 12.6 57.5 48.8 23.5 11.3

Other Equipment.............................................. 18.0 30.0 49.0 32.8 31.9

Electricity............................................................. 4.1 20.1 18.5 4.2 10.2

Built-in Electric Units........................................ 12.2 21.0 30.0 22.3 19.8

Central Warm-Air Furnace................................ 6.0 42.9 27.5 7.1 11.7

For One Housing Unit................................... 1.5 3.9 3.1 2.6 3.1

For Two Housing Units................................. 5.9 10.7 15.1 10.5 12.5

Heat Pump....................................................... 11.4 65.1 35.0 13.6 20.1

Other Equipment.............................................. 31.4 76.0 0.0 33.9 69.3

Fuel Oil................................................................ 12.3 14.7 24.9 42.9 33.0

Steam or Hot Water System............................. 15.9 17.1 39.5 68.6 99.7

For One Housing Unit................................... 20.4 22.3 39.5 74.7 0.0

For Two Housing Units................................. 14.8 15.1 0.0 94.4 99.7

Central Warm-Air Furnace................................ 12.3 16.3 24.7 43.4 34.5

Other Equipment.............................................. 38.8 38.8 0.0 0.0 0.0

Wood................................................................... 12.7 28.3 23.7 24.9 17.1

Heating Stove................................................... 14.4 26.4 33.0 26.5 19.2

Other Equipment.............................................. 18.0 52.3 26.9 39.2 31.8

Propane/LPG....................................................... 8.8 18.1 12.0 15.7 21.9

Central Warm-Air Furnace................................ 8.5 30.6 10.7 15.6 24.8

Room Heater.................................................... 17.3 60.5 70.6 19.2 94.4

Other Equipment.............................................. 37.2 68.2 0.0 43.9 93.7

Kerosene............................................................. 12.3 14.7 24.9 42.9 33.0

Other Fuel............................................................ 21.8 41.2 41.2 52.0 34.9

Housing Units Served by

Main Heating Equipment

One Housing Unit................................................. 0.8 2.3 1.9 1.2 1.1

Two or More Housing Units.................................. 8.9 8.8 27.5 23.8 26.8

Do Not Have Heating Equipment......................... 12.4 73.1 98.4 27.9 12.3

Table HC10.4 Space Heating Characteristics by U.S. Census Region, 2005

Space Heating Characteristics

 Relative Standard Errors

Housing

Units 

(millions)

U.S. Census Region

Northeast Midwest South West

Energy Information Administration

2005 Resdiential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Table HC10.4 Space Heating Characteristics by U.S. Census Region, 2005

Space Heating Characteristics

 Relative Standard Errors

Housing

Units 

(millions)

U.S. Census Region

Northeast Midwest South West

Age of Main Heating Equipment

Used by One Housing Unit

Less than 2 Years............................................ 5.3 12.5 9.2 8.7 12.4

2 to 4 Years...................................................... 4.4 11.6 10.4 6.0 11.0

5 to 9 Years...................................................... 4.2 12.7 5.4 7.3 9.2

10 to 19 Years.................................................. 3.4 8.1 6.1 6.1 6.8

20 Years or More.............................................. 3.9 9.6 7.5 8.9 5.5

Don't Know....................................................... 6.7 15.8 12.8 12.6 11.8

Used by Two or More Housing Units

Less than 2 Years............................................ 36.2 60.1 60.7 58.0 0.0

2 to 4 Years...................................................... 27.0 37.4 59.7 51.6 99.3

5 to 9 Years...................................................... 30.5 40.2 98.7 51.6 106.0

10 to 19 Years.................................................. 16.4 14.7 65.6 39.5 46.9

20 Years or More.............................................. 9.6 14.0 20.1 26.1 21.5

Don't Know....................................................... 15.0 15.8 40.0 39.3 50.3

Proportion of Heat Provided by

Main Heating Equipment

All or Almost All....................................................... 0.4 0.6 1.0 0.7 1.3

About Three-Fourths................................................ 6.9 17.0 12.3 9.9 17.4

Closer to One-Half................................................... 7.7 21.4 18.5 14.7 11.3

Secondary Heating Fuel and Equipment

(More than one may apply)

No........................................................................ 1.3 3.3 1.8 2.3 3.1

Yes...................................................................... 2.9 12.1 3.1 5.6 4.9

Natural Gas...................................................... 8.7 38.3 14.5 18.8 13.8

Fireplace....................................................... 11.3 51.1 22.2 22.9 16.7

Room Heater................................................ 24.3 50.4 46.8 34.5 110.6

Central Warm-Air Furnace............................ 16.6 95.6 25.8 32.6 28.5

Other Equipment.......................................... 26.1 41.0 43.6 102.8 54.9

Electricity.......................................................... 3.7 13.3 5.9 7.0 5.2

Portable Heater............................................. 4.8 16.2 6.9 10.0 6.2

Built-in Electric Units..................................... 8.9 16.5 16.4 15.1 18.5

Heat Pump................................................... 19.8 0.0 46.7 22.3 75.8

Other Equipment.......................................... 33.0 0.0 57.2 61.8 52.1

Fuel Oil............................................................. 28.8 35.7 57.5 93.6 0.0

Wood............................................................... 6.3 18.2 9.8 12.7 10.9

Fireplace....................................................... 8.5 32.6 14.7 15.4 13.6

Heating Stove............................................... 11.0 17.6 28.5 21.0 22.1

Other Equipment.......................................... 55.5 93.8 96.9 0.0 92.0

Propane/LPG................................................... 15.3 44.5 23.4 24.9 42.7

Kerosene.......................................................... 15.3 44.5 23.4 24.9 42.7

Other Fuel........................................................ 32.7 64.9 50.2 101.2 67.4

 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 Resdiential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Total........................................................................ 111.1 20.6 15.1 5.5

Do Not Have Space Heating Equipment............... 1.2 Q Q Q

Have Main Space Heating Equipment.................. 109.8 20.5 15.1 5.4

Use Main Space Heating Equipment.................... 109.1 20.5 15.1 5.4

Have Equipment But Do Not Use It...................... 0.8 N N N

Main Heating Fuel and Equipment

Natural Gas.......................................................... 58.2 11.4 9.1 2.3

Central Warm-Air Furnace................................ 44.7 6.1 5.3 0.8

For One Housing Unit................................... 42.9 5.6 4.9 0.7

For Two Housing Units................................. 1.8 0.5 0.4 Q

Steam or Hot Water System............................. 8.2 4.9 3.6 1.3

For One Housing Unit................................... 5.1 3.2 2.2 1.0

For Two Housing Units................................. 3.1 1.7 1.4 0.3

Floor, Wall or Pipeless Furnace....................... 2.3 Q Q Q

Room Heater.................................................... 2.0 Q Q Q

Other Equipment.............................................. 0.9 0.2 Q Q

Electricity............................................................. 33.7 1.6 1.3 0.3

Built-in Electric Units........................................ 5.0 0.9 0.7 0.2

Central Warm-Air Furnace................................ 16.0 0.3 0.2 Q

For One Housing Unit................................... 81.5 13.5 10.1 3.4

For Two Housing Units................................. 18.1 4.2 3.2 1.0

Heat Pump....................................................... 9.2 Q Q N

Other Equipment.............................................. 1.3 Q Q N

Fuel Oil................................................................ 7.7 6.2 3.8 2.4

Steam or Hot Water System............................. 4.7 4.3 2.8 1.5

For One Housing Unit................................... 3.3 3.0 1.8 1.2

For Two Housing Units................................. 1.4 1.3 1.0 0.3

Central Warm-Air Furnace................................ 2.8 1.8 0.9 0.9

Other Equipment.............................................. QQQQ

Wood................................................................... 2.9 0.5 0.3 0.2

Heating Stove................................................... 2.0 0.3 Q Q

Other Equipment.............................................. 0.9 Q Q Q

Propane/LPG....................................................... 6.0 0.4 0.3 Q

Central Warm-Air Furnace................................ 4.1 0.2 0.2 Q

Room Heater.................................................... 0.9 Q Q Q

Other Equipment.............................................. 0.3 Q N Q

Kerosene............................................................. 7.7 6.2 3.8 2.4

Other Fuel............................................................ 0.6 Q Q Q

Housing Units Served by

Main Heating Equipment

One Housing Unit................................................. 101.0 16.2 11.7 4.5

Two or More Housing Units.................................. 8.8 4.3 3.4 1.0

Do Not Have Heating Equipment......................... 1.2 Q Q Q

Table HC11.4 Space Heating Characteristics by Northeast Census Region, 2005

Space Heating Characteristics

 Million U.S. Housing Units

Middle Atlantic New England

Northeast Census Region

U.S.

Housing

Units

(millions)

Census Division

Total

Northeast

Energy Information Administration

2005 Resdiential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Table HC11.4 Space Heating Characteristics by Northeast Census Region, 2005

Space Heating Characteristics

 Million U.S. Housing Units

Middle Atlantic New England

Northeast Census Region

U.S.

Housing

Units

(millions)

Census Division

Total

Northeast

Age of Main Heating Equipment

Used by One Housing Unit

Less than 2 Years............................................ 11.7 1.6 1.2 0.4

2 to 4 Years...................................................... 13.8 1.9 1.4 0.6

5 to 9 Years...................................................... 20.6 2.5 1.9 0.6

10 to 19 Years.................................................. 24.8 3.8 2.8 1.1

20 Years or More.............................................. 21.5 4.8 3.7 1.1

Don't Know....................................................... 8.6 1.5 0.9 0.6

Used by Two or More Housing Units

Less than 2 Years............................................ 0.3 Q Q Q

2 to 4 Years...................................................... 0.4 Q Q Q

5 to 9 Years...................................................... 0.6 0.4 0.3 Q

10 to 19 Years.................................................. 1.1 0.5 0.4 Q

20 Years or More.............................................. 2.7 1.3 1.2 Q

Don't Know....................................................... 3.7 1.8 1.2 0.6

Proportion of Heat Provided by

Main Heating Equipment

All or Almost All....................................................... 100.9 19.4 14.3 5.1

About Three-Fourths................................................ 5.8 0.8 0.5 0.3

Closer to One-Half................................................... 4.4 0.5 0.3 Q

Secondary Heating Fuel and Equipment

(More than one may apply)

No........................................................................ 76.2 16.2 12.1 4.1

Yes...................................................................... 34.9 4.4 3.0 1.4

Natural Gas...................................................... 5.0 0.4 0.3 Q

Fireplace....................................................... 2.8 Q Q Q

Room Heater................................................ 0.6 Q Q Q

Central Warm-Air Furnace............................ 1.1 Q Q N

Other Equipment.......................................... 0.4 Q Q Q

Electricity.......................................................... 19.7 2.5 1.8 0.7

Portable Heater............................................. 16.0 2.0 1.5 0.5

Built-in Electric Units..................................... 2.2 0.4 Q 0.2

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

Other Equipment.......................................... 0.4 N N N

Fuel Oil............................................................. 0.4 0.2 Q Q

Wood............................................................... 8.9 0.9 0.6 0.3

Fireplace....................................................... 6.7 0.4 Q Q

Heating Stove............................................... 2.2 0.6 0.3 0.2

Other Equipment.......................................... Q Q N Q

Propane/LPG................................................... 2.3 0.3 Q Q

Kerosene.......................................................... 2.3 0.3 Q Q

Other Fuel........................................................ 0.2 Q Q Q

 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 Resdiential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Total........................................................................ 111.1 25.6 17.7 7.9

Do Not Have Space Heating Equipment............... 1.2 Q Q N

Have Main Space Heating Equipment.................. 109.8 25.6 17.7 7.9

Use Main Space Heating Equipment.................... 109.1 25.6 17.7 7.9

Have Equipment But Do Not Use It...................... 0.8 N N N

Main Heating Fuel and Equipment

Natural Gas.......................................................... 58.2 18.4 13.1 5.3

Central Warm-Air Furnace................................ 44.7 16.2 11.6 4.7

For One Housing Unit................................... 42.9 15.5 11.0 4.5

For Two Housing Units................................. 1.8 0.7 0.6 Q

Steam or Hot Water System............................. 8.2 1.6 1.2 0.4

For One Housing Unit................................... 5.1 1.1 0.9 Q

For Two Housing Units................................. 3.1 0.5 Q Q

Floor, Wall or Pipeless Furnace....................... 2.3 0.3 Q Q

Room Heater.................................................... 2.0 Q Q Q

Other Equipment.............................................. 0.9 Q Q Q

Electricity............................................................. 33.7 3.5 2.1 1.4

Built-in Electric Units........................................ 5.0 1.1 0.8 0.3

Central Warm-Air Furnace................................ 16.0 1.4 0.6 0.7

For One Housing Unit................................... 81.5 20.2 14.1 6.1

For Two Housing Units................................. 18.1 3.2 2.2 1.1

Heat Pump....................................................... 9.2 0.8 0.6 Q

Other Equipment.............................................. 1.3 N N N

Fuel Oil................................................................ 7.7 0.7 0.7 Q

Steam or Hot Water System............................. 4.7 Q Q N

For One Housing Unit................................... 3.3 Q Q N

For Two Housing Units................................. 1.4 N N N

Central Warm-Air Furnace................................ 2.8 0.5 0.4 Q

Other Equipment.............................................. Q N N N

Wood................................................................... 2.9 0.7 0.4 0.3

Heating Stove................................................... 2.0 0.4 Q Q

Other Equipment.............................................. 0.9 0.3 Q Q

Propane/LPG....................................................... 6.0 1.9 1.1 0.8

Central Warm-Air Furnace................................ 4.1 1.7 1.0 0.7

Room Heater.................................................... 0.9 Q Q Q

Other Equipment.............................................. 0.3 N N N

Kerosene............................................................. 7.7 0.7 0.7 Q

Other Fuel............................................................ 0.6 Q Q Q

Housing Units Served by

Main Heating Equipment

One Housing Unit................................................. 101.0 23.9 16.5 7.4

Two or More Housing Units.................................. 8.8 1.6 1.2 0.4

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

Table HC12.4 Space Heating Characteristics by Midwest Census Region, 2005

Space Heating Characteristics

 Million U.S. Housing Units

East North Central West North Central

Midwest Census Region

U.S.

Housing

Units

(millions)

Census Division

Total

Midwest

Energy Information Administration

2005 Resdiential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Table HC12.4 Space Heating Characteristics by Midwest Census Region, 2005

Space Heating Characteristics

 Million U.S. Housing Units

East North Central West North Central

Midwest Census Region

U.S.

Housing

Units

(millions)

Census Division

Total

Midwest

Age of Main Heating Equipment

Used by One Housing Unit

Less than 2 Years............................................ 11.7 2.7 1.7 1.0

2 to 4 Years...................................................... 13.8 2.9 2.0 0.8

5 to 9 Years...................................................... 20.6 5.0 3.4 1.5

10 to 19 Years.................................................. 24.8 6.3 4.2 2.1

20 Years or More.............................................. 21.5 5.0 3.8 1.2

Don't Know....................................................... 8.6 2.1 1.3 0.8

Used by Two or More Housing Units

Less than 2 Years............................................ 0.3 Q Q Q

2 to 4 Years...................................................... 0.4 Q Q Q

5 to 9 Years...................................................... 0.6 Q Q N

10 to 19 Years.................................................. 1.1 Q Q Q

20 Years or More.............................................. 2.7 0.5 0.3 Q

Don't Know....................................................... 3.7 0.8 0.6 Q

Proportion of Heat Provided by

Main Heating Equipment

All or Almost All....................................................... 100.9 23.2 16.1 7.1

About Three-Fourths................................................ 5.8 1.5 0.9 0.6

Closer to One-Half................................................... 4.4 0.9 0.7 Q

Secondary Heating Fuel and Equipment

(More than one may apply)

No........................................................................ 76.2 16.2 11.4 4.8

Yes...................................................................... 34.9 9.4 6.3 3.0

Natural Gas...................................................... 5.0 1.5 1.0 0.5

Fireplace....................................................... 2.8 0.8 0.4 0.4

Room Heater................................................ 0.6 Q Q Q

Central Warm-Air Furnace............................ 1.1 0.4 Q Q

Other Equipment.......................................... 0.4 Q Q Q

Electricity.......................................................... 19.7 5.3 3.8 1.5

Portable Heater............................................. 16.0 4.3 3.1 1.2

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

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

Other Equipment.......................................... 0.4 Q Q Q

Fuel Oil............................................................. 0.4 Q Q Q

Wood............................................................... 8.9 2.2 1.3 0.9

Fireplace....................................................... 6.7 1.7 1.0 0.7

Heating Stove............................................... 2.2 0.5 Q 0.2

Other Equipment.......................................... Q Q N Q

Propane/LPG................................................... 2.3 0.7 0.4 0.3

Kerosene.......................................................... 2.3 0.7 0.4 0.3

Other Fuel........................................................ 0.2 Q Q Q

 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 Resdiential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Total........................................................................ 111.1 40.7 21.7 6.9 12.1

Do Not Have Space Heating Equipment............... 1.2 Q Q N Q

Have Main Space Heating Equipment.................. 109.8 40.3 21.4 6.9 12.0

Use Main Space Heating Equipment.................... 109.1 40.1 21.2 6.9 12.0

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

Main Heating Fuel and Equipment

Natural Gas.......................................................... 58.2 13.6 5.6 2.3 5.7

Central Warm-Air Furnace................................ 44.7 11.0 4.4 1.9 4.6

For One Housing Unit................................... 42.9 10.7 4.2 1.9 4.5

For Two Housing Units................................. 1.8 Q Q N Q

Steam or Hot Water System............................. 8.2 1.0 0.8 Q Q

For One Housing Unit................................... 5.1 0.4 0.4 Q N

For Two Housing Units................................. 3.1 0.6 0.4 Q Q

Floor, Wall or Pipeless Furnace....................... 2.3 0.2 Q Q Q

Room Heater.................................................... 2.0 0.9 Q Q 0.5

Other Equipment.............................................. 0.9 0.4 Q Q 0.3

Electricity............................................................. 33.7 22.1 13.5 3.4 5.2

Built-in Electric Units........................................ 5.0 1.5 1.1 0.3 Q

Central Warm-Air Furnace................................ 16.0 11.0 5.4 1.9 3.8

For One Housing Unit................................... 81.5 30.7 15.7 5.8 9.2

For Two Housing Units................................. 18.1 6.8 4.1 0.7 2.0

Heat Pump....................................................... 9.2 7.2 5.6 1.1 0.5

Other Equipment.............................................. 1.3 1.2 1.1 Q Q

Fuel Oil................................................................ 7.7 0.5 0.5 Q N

Steam or Hot Water System............................. 4.7 Q Q N N

For One Housing Unit................................... 3.3 Q Q N N

For Two Housing Units................................. 1.4 Q Q N N

Central Warm-Air Furnace................................ 2.8 0.3 0.3 Q N

Other Equipment.............................................. Q NNNN

Wood................................................................... 2.9 0.9 0.3 0.2 0.3

Heating Stove................................................... 2.0 0.7 Q 0.2 Q

Other Equipment.............................................. 0.9 QQQQ

Propane/LPG....................................................... 6.0 2.7 1.0 0.9 0.8

Central Warm-Air Furnace................................ 4.1 1.5 0.6 0.5 0.4

Room Heater.................................................... 0.9 0.7 Q 0.3 Q

Other Equipment.............................................. 0.3 QQQQ

Kerosene............................................................. 7.7 0.5 0.5 Q N

Other Fuel............................................................ 0.6 Q Q Q N

Housing Units Served by

Main Heating Equipment

One Housing Unit................................................. 101.0 38.4 20.1 6.7 11.5

Two or More Housing Units.................................. 8.8 1.9 1.3 Q 0.5

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

U.S.

Housing

Units

(millions)

Census Division

Total 

South

Table HC13.4 Space Heating Characteristics by South Census Region, 2005

Space Heating Characteristics

 Million U.S. Housing Units

South Atlantic East South 

Central

West South 

Central

South Census Region

Energy Information Administration

2005 Resdiential Energy Consumption Survey: Preliminary Housing Characteristics Tables
U.S.

Housing

Units

(millions)

Census Division

Total 

South

Table HC13.4 Space Heating Characteristics by South Census Region, 2005

Space Heating Characteristics

 Million U.S. Housing Units

South Atlantic East South 

Central

West South 

Central

South Census Region

Age of Main Heating Equipment

Used by One Housing Unit

Less than 2 Years............................................ 11.7 4.6 2.3 0.9 1.4

2 to 4 Years...................................................... 13.8 6.5 3.0 1.1 2.4

5 to 9 Years...................................................... 20.6 8.9 5.1 1.6 2.2

10 to 19 Years.................................................. 24.8 9.8 5.3 1.8 2.7

20 Years or More.............................................. 21.5 5.7 2.7 1.0 2.0

Don't Know....................................................... 8.6 3.0 1.6 0.5 0.9

Used by Two or More Housing Units

Less than 2 Years............................................ 0.3 Q Q N Q

2 to 4 Years...................................................... 0.4 Q N Q Q

5 to 9 Years...................................................... 0.6 Q Q N Q

10 to 19 Years.................................................. 1.1 0.3 Q Q Q

20 Years or More.............................................. 2.7 0.4 Q Q Q

Don't Know....................................................... 3.7 0.9 0.7 Q Q

Proportion of Heat Provided by

Main Heating Equipment

All or Almost All....................................................... 100.9 37.4 19.7 6.3 11.4

About Three-Fourths................................................ 5.8 2.0 1.1 0.4 0.5

Closer to One-Half................................................... 4.4 1.3 0.9 Q Q

Secondary Heating Fuel and Equipment

(More than one may apply)

No........................................................................ 76.2 28.9 15.8 4.1 9.0

Yes...................................................................... 34.9 11.8 5.9 2.8 3.1

Natural Gas...................................................... 5.0 1.3 0.5 0.4 0.3

Fireplace....................................................... 2.8 0.7 Q 0.2 Q

Room Heater................................................ 0.6 0.3 Q Q Q

Central Warm-Air Furnace............................ 1.1 Q Q Q N

Other Equipment.......................................... 0.4 Q Q N N

Electricity.......................................................... 19.7 6.9 3.5 1.7 1.7

Portable Heater............................................. 16.0 5.6 2.6 1.4 1.6

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

Heat Pump................................................... 0.6 0.4 0.3 Q Q

Other Equipment.......................................... 0.4 Q Q Q N

Fuel Oil............................................................. 0.4 Q Q N N

Wood............................................................... 8.9 3.1 1.7 0.5 0.9

Fireplace....................................................... 6.7 2.6 1.4 0.4 0.8

Heating Stove............................................... 2.2 0.5 0.3 Q Q

Other Equipment.......................................... Q NNNN

Propane/LPG................................................... 2.3 1.1 0.6 0.2 Q

Kerosene.......................................................... 2.3 1.1 0.6 0.2 Q

Other Fuel........................................................ 0.2 Q N N Q

 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 Resdiential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Total........................................................................ 111.1 24.2 7.6 16.6

Do Not Have Space Heating Equipment............... 1.2 0.7 Q 0.7

Have Main Space Heating Equipment.................. 109.8 23.4 7.5 16.0

Use Main Space Heating Equipment.................... 109.1 22.9 7.4 15.4

Have Equipment But Do Not Use It...................... 0.8 0.6 Q 0.5

Main Heating Fuel and Equipment

Natural Gas.......................................................... 58.2 14.7 4.6 10.1

Central Warm-Air Furnace................................ 44.7 11.4 4.0 7.4

For One Housing Unit................................... 42.9 11.1 3.8 7.3

For Two Housing Units................................. 1.8 0.3 Q Q

Steam or Hot Water System............................. 8.2 0.6 0.3 0.3

For One Housing Unit................................... 5.1 0.4 0.2 0.1

For Two Housing Units................................. 3.1 Q Q Q

Floor, Wall or Pipeless Furnace....................... 2.3 1.6 0.3 1.3

Room Heater.................................................... 2.0 0.8 Q 0.8

Other Equipment.............................................. 0.9 0.3 Q 0.2

Electricity............................................................. 33.7 6.5 1.8 4.7

Built-in Electric Units........................................ 5.0 1.6 0.3 1.3

Central Warm-Air Furnace................................ 16.0 3.4 0.9 2.4

For One Housing Unit................................... 81.5 17.1 5.7 11.4

For Two Housing Units................................. 18.1 4.0 0.7 3.2

Heat Pump....................................................... 9.2 1.0 0.5 0.5

Other Equipment.............................................. 1.3 Q N Q

Fuel Oil................................................................ 7.7 0.3 Q Q

Steam or Hot Water System............................. 4.7 Q N Q

For One Housing Unit................................... 3.3 N N N

For Two Housing Units................................. 1.4 Q N Q

Central Warm-Air Furnace................................ 2.8 Q Q Q

Other Equipment.............................................. Q N N N

Wood................................................................... 2.9 0.8 0.3 0.5

Heating Stove................................................... 2.0 0.5 Q 0.3

Other Equipment.............................................. 0.9 0.3 Q Q

Propane/LPG....................................................... 6.0 1.0 0.6 0.4

Central Warm-Air Furnace................................ 4.1 0.6 0.4 Q

Room Heater.................................................... 0.9 Q Q N

Other Equipment.............................................. 0.3 Q Q N

Kerosene............................................................. 7.7 0.3 Q Q

Other Fuel............................................................ 0.6 Q Q Q

Housing Units Served by

Main Heating Equipment

One Housing Unit................................................. 101.0 22.5 7.0 15.5

Two or More Housing Units.................................. 8.8 0.9 0.4 0.5

Do Not Have Heating Equipment......................... 1.2 0.7 Q 0.7

Table HC14.4 Space Heating Characteristics by West Census Region, 2005

Space Heating Characteristics

 Million U.S. Housing Units

Mountain Pacific

West Census Region

U.S.

Housing

Units

(millions)

Census Division

Total

West

Energy Information Administration

2005 Resdiential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Table HC14.4 Space Heating Characteristics by West Census Region, 2005

Space Heating Characteristics

 Million U.S. Housing Units

Mountain Pacific

West Census Region

U.S.

Housing

Units

(millions)

Census Division

Total

West

Age of Main Heating Equipment

Used by One Housing Unit

Less than 2 Years............................................ 11.7 2.7 1.0 1.8

2 to 4 Years...................................................... 13.8 2.5 1.0 1.5

5 to 9 Years...................................................... 20.6 4.3 1.7 2.6

10 to 19 Years.................................................. 24.8 4.9 1.8 3.2

20 Years or More.............................................. 21.5 6.0 1.2 4.8

Don't Know....................................................... 8.6 2.1 0.4 1.6

Used by Two or More Housing Units

Less than 2 Years............................................ 0.3 N N N

2 to 4 Years...................................................... 0.4 Q N Q

5 to 9 Years...................................................... 0.6 Q Q N

10 to 19 Years.................................................. 1.1 Q Q Q

20 Years or More.............................................. 2.7 0.5 Q 0.3

Don't Know....................................................... 3.7 Q Q Q

Proportion of Heat Provided by

Main Heating Equipment

All or Almost All....................................................... 100.9 21.0 6.5 14.6

About Three-Fourths................................................ 5.8 1.5 0.5 1.0

Closer to One-Half................................................... 4.4 1.6 0.6 1.0

Secondary Heating Fuel and Equipment

(More than one may apply)

No........................................................................ 76.2 14.9 4.4 10.4

Yes...................................................................... 34.9 9.3 3.1 6.2

Natural Gas...................................................... 5.0 1.8 0.6 1.3

Fireplace....................................................... 2.8 1.2 0.4 0.7

Room Heater................................................ 0.6 Q Q N

Central Warm-Air Furnace............................ 1.1 0.4 Q 0.4

Other Equipment.......................................... 0.4 Q N Q

Electricity.......................................................... 19.7 5.1 1.6 3.5

Portable Heater............................................. 16.0 4.1 1.2 2.8

Built-in Electric Units..................................... 2.2 0.7 Q 0.5

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

Other Equipment.......................................... 0.4 Q Q Q

Fuel Oil............................................................. 0.4 N N N

Wood............................................................... 8.9 2.7 1.0 1.7

Fireplace....................................................... 6.7 2.0 0.6 1.4

Heating Stove............................................... 2.2 0.7 0.4 0.3

Other Equipment.......................................... Q Q N Q

Propane/LPG................................................... 2.3 Q Q Q

Kerosene.......................................................... 2.3 Q Q Q

Other Fuel........................................................ 0.2 Q Q Q

 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 Resdiential Energy Consumption Survey: Preliminary Housing Characteristics Tables
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
Table HC15.4 Space Heating Characteristics by Four Most Populated States, 2005

Total........................................................................ 111.1 7.1 7.0 8.0 12.1

Do Not Have Space Heating Equipment............... 1.2 Q Q Q 0.2

Have Main Space Heating Equipment.................. 109.8 7.1 6.8 7.9 11.9

Use Main Space Heating Equipment.................... 109.1 7.1 6.6 7.9 11.4

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

Main Heating Fuel and Equipment

Natural Gas.......................................................... 58.2 3.8 0.4 3.8 8.4

Central Warm-Air Furnace................................ 44.7 1.8 Q 3.1 6.0

For One Housing Unit................................... 42.9 1.5 Q 3.1 6.0

For Two Housing Units................................. 1.8 Q N Q Q

Steam or Hot Water System............................. 8.2 1.9 Q Q 0.2

For One Housing Unit................................... 5.1 0.8 Q N Q

For Two Housing Units................................. 3.1 1.1 Q Q Q

Floor, Wall or Pipeless Furnace....................... 2.3 Q N N 1.3

Room Heater.................................................... 2.0 N N 0.3 0.7

Other Equipment.............................................. 0.9 Q N Q Q

Electricity............................................................. 33.7 0.6 6.3 3.8 2.8

Built-in Electric Units........................................ 5.0 0.3 Q Q 0.5

Central Warm-Air Furnace................................ 16.0 Q 2.5 2.8 1.8

For One Housing Unit................................... 81.5 3.5 4.8 6.1 8.0

For Two Housing Units................................. 18.1 2.3 1.8 1.5 2.6

Heat Pump....................................................... 9.2 Q 2.5 0.3 Q

Other Equipment.............................................. 1.3 Q 1.1 Q N

Fuel Oil................................................................ 7.7 2.2 N N Q

Steam or Hot Water System............................. 4.7 1.8 N N Q

For One Housing Unit................................... 3.3 Q N N N

For Two Housing Units................................. 1.4 0.9 N N Q

Central Warm-Air Furnace................................ 2.8 Q N N N

Other Equipment.............................................. Q N N N N

Wood................................................................... 2.9 Q N Q 0.3

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

Other Equipment.............................................. 0.9 Q N Q Q

Propane/LPG....................................................... 6.0 Q Q Q 0.3

Central Warm-Air Furnace................................ 4.1 Q Q Q Q

Room Heater.................................................... 0.9 Q N N N

Other Equipment.............................................. 0.3 N N Q N

Kerosene............................................................. 7.7 2.2 N N Q

Other Fuel............................................................ 0.6 Q N N Q

Housing Units Served by

Main Heating Equipment

One Housing Unit................................................. 101.0 4.4 6.4 7.4 11.4

Two or More Housing Units.................................. 8.8 2.6 Q 0.5 0.4

Do Not Have Heating Equipment......................... 1.2 Q Q Q 0.2

Space Heating Characteristics

 Million U.S. Housing Units

Housing

Units 

(millions)

Four Most Populated States

New York Florida Texas California

Energy Information Administration

2005 Resdiential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Table HC15.4 Space Heating Characteristics by Four Most Populated States, 2005

Space Heating Characteristics

 Million U.S. Housing Units

Housing

Units 

(millions)

Four Most Populated States

New York Florida Texas California

Age of Main Heating Equipment

Used by One Housing Unit

Less than 2 Years............................................ 11.7 0.4 0.9 1.0 1.3

2 to 4 Years...................................................... 13.8 0.6 1.2 1.6 1.2

5 to 9 Years...................................................... 20.6 0.6 1.7 1.3 1.6

10 to 19 Years.................................................. 24.8 1.1 1.3 1.8 2.3

20 Years or More.............................................. 21.5 1.3 0.8 1.1 3.9

Don't Know....................................................... 8.6 0.5 0.5 0.6 1.1

Used by Two or More Housing Units

Less than 2 Years............................................ 0.3 Q Q Q N

2 to 4 Years...................................................... 0.4 Q N Q Q

5 to 9 Years...................................................... 0.6 Q Q Q N

10 to 19 Years.................................................. 1.1 Q Q Q Q

20 Years or More.............................................. 2.7 0.9 N Q 0.2

Don't Know....................................................... 3.7 1.1 Q Q Q

Proportion of Heat Provided by

Main Heating Equipment

All or Almost All....................................................... 100.9 6.8 6.8 7.6 10.7

About Three-Fourths................................................ 5.8 Q Q Q 0.7

Closer to One-Half................................................... 4.4 Q Q Q 0.7

Secondary Heating Fuel and Equipment

(More than one may apply)

No........................................................................ 76.2 5.9 6.4 6.0 8.0

Yes...................................................................... 34.9 1.2 0.7 2.0 4.1

Natural Gas...................................................... 5.0 Q Q 0.3 0.9

Fireplace....................................................... 2.8 N Q Q 0.5

Room Heater................................................ 0.6 Q N Q N

Central Warm-Air Furnace............................ 1.1 N N N 0.3

Other Equipment.......................................... 0.4 N N N Q

Electricity.......................................................... 19.7 0.5 0.5 1.0 2.3

Portable Heater............................................. 16.0 0.5 0.4 0.8 2.0

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

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

Other Equipment.......................................... 0.4 N N N N

Fuel Oil............................................................. 0.4 Q N N N

Wood............................................................... 8.9 0.4 Q 0.7 1.1

Fireplace....................................................... 6.7 Q Q 0.6 1.0

Heating Stove............................................... 2.2 Q N Q Q

Other Equipment.......................................... Q N N N N

Propane/LPG................................................... 2.3 Q Q Q Q

Kerosene.......................................................... 2.3 Q Q Q Q

Other Fuel........................................................ 0.2 N N N N

 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 Resdiential Energy Consumption Survey: Preliminary Housing Characteristics Tables