7.2 - CENTRAL AIR CONDITIONING
  Number of households by type of dwelling1
Double/row houses Low-rise apartments High-rise apartments Mobile homes
Age of the central air conditioner
5 years or less 193,618 M U U U
6 to 10 years 118,013 M U U U
11 to 15 years 153,799 M U U U
16 to 20 years U U U U
21 years or more U U U
Don't know U U U U
Not stated U U U U
Households with an ENERGY STAR® central air conditioner
Yes 204,241 M U U U
No 48,844 M U U U
Don't know 284,325 M U 223,512 M U
Not stated U U U U

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