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

Number of Water Heaters

1.............................................................................. 106.3 31.9 7.9 3.4 5.8 13.7 1.1

2 or More................................................................. 3.7 0.4 QQQQN

Do Not Use Hot Water............................................ 1.1 0.7 Q Q Q 0.6 Q

Housing Units Served by Main Water Heater

One Housing Unit.................................................... 99.7 23.5 8.0 3.1 4.0 7.3 1.1

Two or More Housing Units..................................... 10.3 8.8 Q 0.3 1.8 6.6 Q

Do Not Use Hot Water............................................ 1.1 0.7 Q Q Q 0.6 Q

Main Water Heating Fuel

Electric.................................................................... 43.1 13.6 3.5 1.3 2.0 6.0 0.8

For One Housing Unit.......................................... 40.3 11.5 3.5 1.1 1.7 4.4 0.8

For Two or More Housing Units........................... 2.7 2.1 N Q 0.3 1.7 N

Natural Gas............................................................. 58.7 16.8 4.2 2.1 3.5 6.8 0.3

For One Housing Unit.......................................... 52.5 11.4 4.2 1.9 2.3 2.8 0.2

For Two or More Housing Units........................... 6.2 5.4 Q 0.2 1.2 4.0 Q

Fuel Oil................................................................... 4.0 1.2 Q Q 0.3 0.7 Q

For One Housing Unit.......................................... 3.0 0.2 QQQQQ

For Two or More Housing Units........................... 1.1 1.0 N N 0.3 0.7 N

Propane/LPG.......................................................... 4.0 0.6 Q Q Q 0.3 Q

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

Do Not Use Hot Water............................................ 1.1 0.7 Q Q Q 0.6 Q

Age of Main Water Heater

Used by One Housing Unit

Less than 2 Years............................................... 14.7 2.8 1.1 0.5 0.5 0.6 Q

2 to 4 Years......................................................... 18.6 3.2 1.3 0.2 0.6 1.0 Q

5 to 9 Years......................................................... 25.5 4.0 1.5 0.5 0.6 1.1 0.3

10 to 19 Years..................................................... 20.1 3.4 1.4 0.6 0.4 0.9 Q

20 Years or More................................................. 6.8 2.0 0.8 Q Q 0.7 Q

Don't Know.......................................................... 12.0 7.0 1.8 1.0 1.8 2.2 Q

No Separate Water Heater.................................. 1.9 1.0 Q Q Q 0.9 N

Used by Two or More Housing Units

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

2 to 4 Years......................................................... 0.5 Q N Q Q Q N

5 to 9 Years......................................................... 0.5 0.3 QQQQN

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

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

Don't Know.......................................................... 4.4 4.1 N Q 0.9 3.0 N

No Separate Water Heater.................................. 3.4 3.1 N Q 0.4 2.5 Q

5 or More 

Units

Mobile 

Homes

 Million U.S. Housing Units

Table HC4.8 Water Heating Characteristics by Renter-Occupied Housing Unit, 2005

 RenterOccupied 

Housing 

Units 

(millions)

Type of Renter-Occupied Housing Unit

U.S.

Housing 

Units 

(millions

Single-Family Units Apartments in 

Buildings With--

Water Heating Characteristics Detached Attached 2 to 4 

Units

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characterisics Tables
5 or More 

Units

Mobile 

Homes

 Million U.S. Housing Units

Table HC4.8 Water Heating Characteristics by Renter-Occupied Housing Unit, 2005

 RenterOccupied 

Housing 

Units 

(millions)

Type of Renter-Occupied Housing Unit

U.S.

Housing 

Units 

(millions

Single-Family Units Apartments in 

Buildings With--

Water Heating Characteristics Detached Attached 2 to 4 

Units

Size of Main Water Heater

Used by One Housing Unit

Small (30 gallons or less).................................... 17.1 5.9 1.5 0.5 1.0 2.4 0.5

Medium (31 to 49 gallons)................................... 52.4 11.7 4.3 1.9 2.1 3.0 0.5

Large (50 gallons or more).................................. 27.1 4.6 2.1 0.6 0.9 1.0 Q

Tankless water heater......................................... 1.1 QQQQQN

No Separate Water Heater.................................. 1.9 1.0 Q Q Q 0.9 N

Used by Two or More Housing Units

Small (30 gallons or less).................................... 1.4 1.3 N Q 0.2 1.0 N

Medium (31 to 49 gallons)................................... 2.4 2.1 N Q 0.6 1.4 N

Large (50 gallons or more).................................. 2.8 2.2 Q Q 0.6 1.6 N

Tankless water heater......................................... 0.2 0.1 N N Q Q N

No Separate Water Heater.................................. 3.4 3.1 N Q 0.4 2.5 Q

Other Water Heating

Hot Tubs or Spas.................................................. 6.7 Q Q Q N N Q

Electricity............................................................. 5.3 Q Q Q N N Q

Natural Gas......................................................... 1.2 Q Q NNNN

Swimming Pools................................................... 1.9 N N N N N N

Natural Gas......................................................... 1.2 NNNNNN

Electricity............................................................. 0.4 NNNNNN

Propane/LPG....................................................... 0.3 NNNNNN

Some Other Fuel................................................. Q NNNNNN

Electric Water Beds.............................................. 2.2 Q Q Q Q Q N

1.......................................................................... 1.9 QQQQQN

2 or More............................................................. 0.3 Q N N Q N N

Heaters Used all Year.................................... 1.7 Q Q Q Q Q N

1................................................................... 1.5 QQQQQN

2 or More...................................................... 0.3 Q N N 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 Residential Energy Consumption Survey: Preliminary Housing Characterisics Tables