5.2 - DWELLING IMPROVEMENTS TO REDUCE ENERGY CONSUMPTION
  Number of households by year of construction
1980 – 1989 1990 – 1999 2000 – 2011
Made any improvements to the dwelling that reduce energy consumption since January 1st, 2000
No improvements made 280,106 A 324,038 A 1,022,763 A
Improvements have been made 1,137,485 A 791,669 A 489,195 A
Don't know U U U
Not stated U U 68,749 M
Households made improvements to heating equipment (including fireplaces and woodstoves)
5 years or less 304,226 A 208,741 A U
More than 5 years 172,018 A 26,519 M U
Not stated 252,657 A 246,346 M 187,416 M
Total households with improvements 728,901 A 481,605 A 279,025 A
Households made improvements to windows (including patio doors)
5 years or less 434,074 A 170,878 A U
More than 5 years 192,072 M U U
Not stated 248,307 A 265,007 M 181,791 M
Total households with improvements 874,454 A 462,106 A 225,179 A
Households made improvements to caulking or weather-stripping around windows and doors
5 years or less U U U
More than 5 years 97,814 M U U
Not stated 492,717 A 429,011 A 233,798 A
Total households with improvements 709,950 A 488,796 A 267,393 A
Households made improvements to the insulation of the basement or crawl space walls
5 years or less U U U
More than 5 years U U U
Not stated 371,730 A 289,709 M 223,238 A
Total households with improvements 442,879 A 343,040 A 265,837 A
Households made improvements to the insulation around the hot water pipes
5 years or less 122,251 M U U
More than 5 years U U U
Not stated 301,637 A 259,160 M 187,435 M
Total households with improvements 448,050 A 303,409 M 262,934 A
Households made improvements to the insulation of the roof or the attic
5 years or less 83,771 M U U
More than 5 years U U U
Not stated 291,491 A 257,253 M 187,476 M
Total households with improvements 409,936 A 344,528 A 224,721 A
Households made improvements to the insulation of any exterior walls (excluding basement)
5 years or less U U U
More than 5 years U U U
Not stated 312,325 A 265,435 M 200,182 M
Total households with improvements 340,669 A 274,077 M 219,503 A
Households made improvements to exterior doors (including garage doors)
5 years or less 240,801 M 101,299 M U
More than 5 years 91,176 M U U
Not stated 263,761 A 250,193 M 191,126 M
Total households with improvements 595,737 A 368,294 A 228,560 A
Households installed a programmable thermostat
5 years or less 287,890 A 209,055 A 184,606 M
More than 5 years 282,471 M 114,043 M 85,820 M
Not stated 231,983 M 288,822 M 214,872 A
Total households with installments 802,344 A 611,920 A 485,298 A
Households made improvement(s) to the ventilation or central air conditioning equipment
5 years or less 115,962 M 96,354 M U
More than 5 years 114,201 M U U
Not stated 251,128 A 246,892 M 194,342 M
Total households with improvements 481,291 A 381,667 A 294,424 A
Households made other improvement(s)
5 years or less 413,014 A 338,210 A 61,564 M
More than 5 years 249,074 A 47,758 M U
Not stated 195,526 M 243,307 M 184,787 M
Total households with improvements 857,613 A 629,275 A 277,411 A
Number of improvement made since January 1st, 2000
1 to 3 629,199 A 572,619 A 380,223 A
4 to 6 373,433 A 115,302 M U
7 or more 64,173 M U U
Not stated 70,680 M 85,471 M 66,456 M
Main reason household did not make any improvements
No improvements are currently necessary 147,030 M 197,808 A 511,469 A
Planning to make improvements in the future U U U
Not aware of government financial aid or assistance U U U
Planning to sell U U
Dwelling was recently purchased or built U U 465,309 M
Improvements are too costly U U U
Do not have time U U
No government financial aid or assistance U U U
Other U U U
Don't know U U 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