4.5 - WINDOWS
  Number of households by year of construction
1950 – 1969 1970 – 1979 1980 – 1989
Type of windows that are the majority in the dwelling
Standard single pane with a storm window 170,873 M 112,653 M U
Standard single pane U U U
Standard double pane 405,985 A 493,299 A 350,025 A
Standard double pane sealed unit 486,661 A 527,928 A 590,753 A
Standard triple pane sealed unit 51,308 M U 59,423 M
Low-Emissivity (Low-E) coating - gas filled double pane 205,336 A 211,787 A 231,087 M
Low-Emissivity (Low-E) coating - gas filled triple pane 46,220 M U 47,270 M
Standard gas filled double pane 108,110 M 140,736 M 115,313 M
Standard gas filled triple pane U U U
Other U U U
Don't know 192,726 M 115,223 M 191,617 M
Not stated 72,766 M 129,021 M U
Age of the majority of the windows
5 years or less 356,972 A 378,345 M 344,082 A
6 to 10 years 364,706 A 360,683 A 263,707 A
11 to 15 years 267,028 A 299,477 A 165,880 M
16 or more 663,755 A 703,152 A 786,999 A
Don't know 166,018 M 145,261 M 113,349 M
Not stated 52,531 M U U
Condensation on inside surfaces of windows
Yes - on most 316,869 A 367,924 M 278,183 A
Yes - on some 962,711 A 875,535 A 888,677 A
No 1,245,117 A 1,395,216 A 1,269,784 A
Don't know U U U
Not stated U U U
Air leaks or drafts around windows
Yes 980,025 A 987,899 A 800,018 A
No 1,532,328 A 1,567,775 A 1,613,850 A
Don't know U 96,305 M U
Not stated U U U

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