6.2 - PROFILE OF HEATING SYSTEMS
  Number of households by type of dwelling1
Double/row houses Low-rise apartments High-rise apartments Mobile homes
Main energy source for furnace
Electricity U U U U
Natural gas 712,899 A 119,347 M U U
Heating oil U U U U
Wood U U
Propane U U U
Other U
Dual source U U U
Don't know U U U U
Not stated U U
Age of furnace
5 years or less 189,480 M U U U
6 to 10 years 207,407 M U U U
11 to 15 years 184,771 M U U U
16 to 20 years U U U U
21 to 25 years U U U U
26 years or more U U U
Don't know U U U U
Not stated 145,594 M 164,067 M 194,101 M U
Total households with furnace as main heating system 895,005 A 277,145 M 225,166 M 122,718 M
Households with an ENERGY STAR® furnace
Yes 266,277 A U U U
No 111,581 M U U U
Don't know 286,666 M U U U
Not stated 230,481 M 189,074 M 198,481 M U
Efficiency rating of the furnace
High (the exhaust pipe is plastic and vents through the side of the house) 207,285 M U U U
Medium (the exhaust pipe is metal and vents through the side of the house or through the roof) 227,840 M U U
Low (the exhaust pipe is metal and vents through the roof) 37,945 M U U
Don't know 220,843 M U U U
Not stated 201,092 M 187,878 M 198,481 M U
Frequency of furnace filter cleaning/replacement
Every 3 months or more frequently 325,277 A U U U
Every 6 months 210,957 M U U U
Once in the past year 253,787 M U U U
Did not change or clean filter in the past year U U U U
Don't know U U U U
Not stated U U U U
Age of electric baseboards
5 years or less U U U U
6 to 10 years U U U U
11 to 15 years U U U U
16 to 20 years U U U U
21 to 25 years U U U U
26 years or more U U U U
Don't know U 206,849 M U U
Not stated 114,947 M 424,524 M 192,268 M U
Total households with electric baseboards as main heating system 572,924 M 1,113,060 A 396,115 A U
Main energy source for boiler
Electricity U U U
Natural gas U 129,925 M U
Heating oil U U U
Wood
Propane
Other U U U
Dual source U U U
Don't know U U U
Not stated U U U
Age of boiler
5 years or less U U U
6 to 10 years U U U
11 to 15 years U U U
16 to 20 years U U
21 to 25 years U
26 years or more U U
Don't know U U U
Not stated U 387,692 M 194,082 M
Total households with boilers as main heating system 129,214 M 437,752 A 213,504 M U
Households with an ENERGY STAR® boiler
Yes U U
No U U
Don't know U U U
Not stated U 400,935 A 191,591 M U
Households with a heat pump
Yes U U U U
No 1,235,471 A 940,745 A 265,150 M 128,753 M
Don't know 122,367 M U U U
Not stated 153,284 M 315,932 M 118,635 M U
Type of heat pump
Air source U U U U
Ground source U U
Don't know U U
Not stated U
Age of heat pump
5 years or less U U
6 to 10 years U U U U
11 to 15 years U U U
16 to 20 years U U
21 to 25 years
26 years or more
Don't know U U U
Not stated
Households with an ENERGY STAR® heat pump
Yes U U U
No U U U
Don't know U U U
Not stated

Footnotes:

1 Does not include the "Don't know/not stated" category.

Note:

Due to rounding, the numbers may not add up and may differ slightly among tables.

Legend:

The letter beside each estimate classifies its quality as follows: A–Acceptable, M–Use with caution, U–Too unreliable to be published.

Source:

2011 Survey of Household Energy Use