Total............................................................................. 111.1 20.6 25.6 40.7 24.2

Number of Water Heaters

1............................................................................... 106.3 19.6 24.5 39.0 23.2

2 or More.................................................................. 3.7 0.3 0.9 1.5 1.0

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

Housing Units Served by Main Water Heater

One Housing Unit..................................................... 99.7 16.1 23.5 38.2 21.9

Two or More Housing Units....................................... 10.3 3.7 1.9 2.4 2.3

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

Main Water Heating Fuel

Electric...................................................................... 43.1 4.1 7.3 25.5 6.1

For One Housing Unit............................................ 40.3 3.6 6.9 24.5 5.2

For Two or More Housing Units............................. 2.7 0.5 0.4 1.0 0.9

Natural Gas.............................................................. 58.7 11.2 16.9 13.8 16.7

For One Housing Unit............................................ 52.5 9.0 15.4 12.6 15.4

For Two or More Housing Units............................. 6.2 2.2 1.5 1.2 1.3

Fuel Oil..................................................................... 4.0 3.9 N Q N

For One Housing Unit............................................ 3.0 2.9 N Q N

For Two or More Housing Units............................. 1.1 1.0 N Q N

Propane/LPG............................................................ 4.0 0.6 1.2 1.0 1.2

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

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

Age of Main Water Heater

Used by One Housing Unit

Less than 2 Years................................................. 14.7 2.3 3.1 5.6 3.7

2 to 4 Years........................................................... 18.6 2.5 4.2 7.7 4.1

5 to 9 Years........................................................... 25.5 3.6 6.6 9.7 5.7

10 to 19 Years....................................................... 20.1 3.3 5.3 7.4 4.2

20 Years or More.................................................. 6.8 1.6 1.3 2.6 1.2

Don't Know............................................................ 12.0 1.9 2.7 4.6 2.8

No Separate Water Heater.................................... 1.9 0.9 0.3 0.5 Q

Used by Two or More Housing Units

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

2 to 4 Years........................................................... 0.5 0.3 Q Q Q

5 to 9 Years........................................................... 0.5 QQQQ

10 to 19 Years....................................................... 0.6 QQQQ

20 Years or More.................................................. 0.6 Q Q Q 0.2

Don't Know............................................................ 4.4 1.7 1.1 1.0 0.6

No Separate Water Heater.................................... 3.4 1.1 0.5 0.9 1.0

Housing

Units 

(millions)

Table HC10.8 Water Heating Characteristics by U.S. Census Region, 2005

 Million U.S. Housing Units

Water Heating Characteristics

U.S. Census Region

Northeast Midwest South West

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characterisics Tables
Housing

Units 

(millions)

Table HC10.8 Water Heating Characteristics by U.S. Census Region, 2005

 Million U.S. Housing Units

Water Heating Characteristics

U.S. Census Region

Northeast Midwest South West

Size of Main Water Heater

Used by One Housing Unit

Small (30 gallons or less)...................................... 17.1 2.0 3.5 8.5 3.2

Medium (31 to 49 gallons)..................................... 52.4 8.9 13.1 19.7 10.7

Large (50 gallons or more).................................... 27.1 3.6 6.5 9.3 7.7

Tankless water heater........................................... 1.1 0.7 Q Q Q

No Separate Water Heater.................................... 1.9 0.9 0.3 0.5 Q

Used by Two or More Housing Units

Small (30 gallons or less)...................................... 1.4 0.6 Q 0.3 0.3

Medium (31 to 49 gallons)..................................... 2.4 0.8 0.5 0.8 0.3

Large (50 gallons or more).................................... 2.8 0.9 0.7 0.4 0.7

Tankless water heater........................................... 0.2 0.2 N N N

No Separate Water Heater.................................... 3.4 1.1 0.5 0.9 1.0

Other Water Heating

Hot Tubs or Spas.................................................... 6.7 1.0 1.3 2.1 2.2

Electricity.............................................................. 5.3 0.8 1.3 1.7 1.5

Natural Gas........................................................... 1.2 Q Q 0.3 0.6

Swimming Pools..................................................... 1.9 0.3 Q 0.7 0.7

Natural Gas........................................................... 1.2 Q Q 0.4 0.5

Electricity.............................................................. 0.4 Q N Q Q

Propane/LPG........................................................ 0.3 QQQQ

Some Other Fuel................................................... Q Q N N N

Electric Water Beds................................................ 2.2 0.4 0.7 0.7 0.4

1............................................................................ 1.9 0.4 0.6 0.6 0.4

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

Heaters Used all Year...................................... 1.7 0.3 0.6 0.5 0.3

1.................................................................... 1.5 0.3 0.4 0.4 0.3

2 or More....................................................... 0.3 N Q 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 Characterisics Tables