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.............................. 15.2 7.8 1.0 1.2 3.3 1.9

For Two Housing Units............................. 0.9 Q N Q 0.6 N

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

Portable Electric Heater............................... 1.6 0.8 Q Q Q 0.3

Other Equipment......................................... 1.9 0.7 Q Q 0.7 Q

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......................................... 0.3 0.2 Q N Q N

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......................................... 1.0 0.7 Q Q Q 0.2

Kerosene......................................................... 0.7 0.4 Q N Q 0.3

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

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

Type of Housing Unit

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
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

Type of Housing Unit

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............................................... 98.9 63.1 7.1 7.1 15.5 6.2

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

Closer to One-Half.......................................... 4.3 3.5 Q Q 0.3 Q

Do Not Use Main Heating Equipment.............. 2.0 0.5 Q 0.3 0.7 0.3

Secondary Heating Fuel and Equipment

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

Yes (More than one may apply)...................... 34.9 28.8 1.5 1.2 1.6 1.8

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

Fireplace.................................................. 2.7 2.3 0.2 Q Q N

Room Heater........................................... 0.5 0.5 Q N N N

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

Other Equipment...................................... 0.8 0.5 QQQQ

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...................................... 1.3 1.0 QQQQ

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..................................................... 0.9 0.8 Q 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