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............................. 15.2 0.4 0.3 0.9 1.2 3.4 3.5 3.5 2.0

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

Portable Electric Heater......................... 9.2 Q Q 0.4 0.7 1.4 2.5 2.6 1.4

Heat Pump................................................. 1.6 Q Q 0.3 0.3 QQQQ

Other Equipment........................................ 1.9 Q Q Q Q 0.4 0.3 Q Q

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........................................ 0.3 QQQQQQQQ

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........................................ 1.0 QQQQQQQQ

Kerosene....................................................... 0.7 Q N QQQQQN

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 Residential 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............................................. 98.9 13.1 6.6 11.3 10.9 16.6 16.6 15.6 8.4

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......................................... 4.3 0.5 0.4 0.5 0.7 0.7 0.7 0.7 Q

Do Not Use Main Heating Equipment............ 2.0 Q Q Q 0.3 0.7 0.3 0.2 Q

Secondary Heating Fuel and Equipment

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

Yes (More than One May Apply).................... 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................................................ 2.7 Q Q Q Q Q 0.6 0.9 0.5

Room Heater.......................................... 0.5 QQQQQQQQ

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

Other Equipment.................................... 0.8 QQQQQQQQ

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.................................... 1.3 Q Q Q Q 0.3 0.3 Q Q

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 N N QQQQN

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

Kerosene................................................... 0.9 QQQQQQQQ

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 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables