Table 5.2b – Dwelling Improvements To Reduce Energy Consumption By Construction Year


 Number of households by year of construction
Before 1946 1946-1960 1961-1977 1978-1983 1984-1995 1996-2000 2001-2010 2011 or later Not stated
Made any improvements to the dwelling that reduce energy consumption since January 1st, 2015
No improvements made 366,473 A 318,648 A 604,021 A 244,353 A 421,074 A 165,542 A 494,943 A 445,661 A - U
Improvements have been made 679,378 A 674,689 A 1,468,107 A 588,993 A 1,155,086 A 453,353 A 847,844 A 252,457 A - U
Valid Skip Footnote 1 351,215 A 696,690 A 1,228,618 A 646,612 A 641,225 A 207,244 M 513,253 A 442,201 A 289,468 M
Don’t know - U - U 43,268 M - U - U - U - U - U - U
Not stated - U - U 92,854 M 36,968 M 58,948 M - U - U - U - U
Households made improvements to space heating equipment
5 years or less (January 1st, 2015 - December 31st, 2019) 195,963 M 218,220 A 430,756 A 182,348 A 439,633 A 182,841 M 247,672 M 48,130 M - U
No improvements made 433,454 A 415,249 A 924,418 A 368,115 A 633,993 A 240,362 M 537,202 A 196,933 A - U
Valid Skip Footnote 2 717,688 A 1,015,338 A 1,832,639 A 890,966 A 1,062,299 A 372,786 A 1,008,195 A 887,863 A 301,863 M
Not stated 147,944 M 108,705 M 249,055 A 115,142 M 173,467 A 82,735 M 132,186 M - U - U
Households made improvements to water heating equipment
5 years or less (January 1st, 2015 - December 31st, 2019) 229,419 M 265,319 A 531,974 A 211,670 A 512,888 A 226,627 M 324,808 A 61,054 M - U
No improvements made 417,255 A 377,667 A 865,067 A 357,989 A 588,062 A 197,125 A 466,016 A 184,010 A - U
Valid Skip Footnote 2 717,688 A 1,015,338 A 1,832,639 A 890,966 A 1,062,299 A 372,786 A 1,008,195 A 887,863 A 301,863 M
Not stated 130,687 M 99,189 M 207,187 A 95,947 M 146,144 M 82,187 M 126,236 M - U - U
Households made improvements to windows (including patio doors)
5 years or less (January 1st, 2015 - December 31st, 2019) 258,616 M 224,842 A 467,912 A 206,076 A 424,075 A 85,962 M 160,720 M - U - U
No improvements made 375,077 A 429,085 A 914,763 A 346,053 A 665,713 A 340,366 A 617,714 A 223,142 A - U
Valid Skip Footnote 2 717,688 A 1,015,338 A 1,832,639 A 890,966 A 1,062,299 A 372,786 A 1,008,195 A 887,863 A 301,863 M
Not stated 143,669 M 88,248 M 221,553 A 113,477 M 157,305 M 79,611 M 138,626 M - U - U
Households made improvements to caulking or weather-stripping around existing windows and doors
5 years or less (January 1st, 2015 - December 31st, 2019) 188,940 M 128,187 M 295,576 A 115,394 M 244,277 A 87,100 M 144,057 M - U - U
No improvements made 434,843 A 511,319 A 1,065,577 A 431,637 A 839,765 A 335,939 A 656,335 A 194,275 A - U
Valid Skip Footnote 2 717,688 A 1,015,338 A 1,832,639 A 890,966 A 1,062,299 A 372,786 A 1,008,195 A 887,863 A 301,863 M
Not stated 153,578 M 102,669 M 243,076 A 118,574 M 163,051 A 82,899 M 116,668 M - U - U
Households made improvements to the insulation of the basement or crawl space walls
5 years or less (January 1st, 2015 - December 31st, 2019) - U 89,034 M 150,020 A 56,092 M 66,835 M - U 54,161 M - U - U
No improvements made 444,876 A 544,333 A 1,201,767 A 482,331 A 975,483 A 388,490 A 726,999 A 222,137 A - U
Valid Skip Footnote 2 717,688 A 1,015,338 A 1,832,639 A 890,966 A 1,062,299 A 372,786 A 1,008,195 A 887,863 A 301,863 M
Not stated 162,280 M 108,807 M 252,441 A 127,184 M 204,775 A 88,492 M 135,900 M - U - U
Households made improvements to the exterior wall siding
5 years or less (January 1st, 2015 - December 31st, 2019) 99,507 M 78,727 M 155,071 M 62,163 M 92,564 M - U - U - U - U
No improvements made 514,554 A 550,890 A 1,189,436 A 473,081 A 955,334 A 402,177 A 763,548 A 221,732 A - U
Valid Skip Footnote 2 717,688 A 1,015,338 A 1,832,639 A 890,966 A 1,062,299 A 372,786 A 1,008,195 A 887,863 A 301,863 M
Not stated 163,301 M 112,558 M 259,722 A 130,362 M 199,195 A 90,767 M 142,466 M - U - U
Households made improvements to the insulation of the water pipes
5 years or less (January 1st, 2015 - December 31st, 2019) 51,208 M - U 82,104 M 39,834 M 71,293 M - U - U - U - U
No improvements made 571,311 A 606,781 A 1,255,759 A 490,081 A 983,247 A 405,377 A 760,515 A 218,840 A - U
Valid Skip Footnote 2 717,688 A 1,015,338 A 1,832,639 A 890,966 A 1,062,299 A 372,786 A 1,008,195 A 887,863 A 301,863 M
Not stated 154,843 M 105,426 M 266,367 A 135,691 M 192,554 A 88,783 M 142,951 M - U - U
Households made improvements to the insulation of the roof or the attic
5 years or less (January 1st, 2015 - December 31st, 2019) 80,020 M 92,642 M 190,783 A 70,675 M 130,426 A - U - U - U - U
No improvements made 532,815 A 551,108 A 1,166,264 A 463,169 A 929,720 A 340,733 A 731,027 A 219,406 A - U
Valid Skip Footnote 2 717,688 A 1,015,338 A 1,832,639 A 890,966 A 1,062,299 A 372,786 A 1,008,195 A 887,863 A 301,863 M
Not stated 164,527 M 98,424 M 247,182 A 131,763 M 186,947 A 87,038 M 136,192 M - U - U
Households made improvements to the insulation of any exterior walls (excluding basement)
5 years or less (January 1st, 2015 - December 31st, 2019) 72,892 M 51,537 M 89,239 M - U 35,055 M - U - U - U - U
No improvements made 550,044 A 574,855 A 1,250,607 A 515,544 A 1,004,774 A 406,196 A 762,331 A 227,875 A - U
Valid Skip Footnote 2 717,688 A 1,015,338 A 1,832,639 A 890,966 A 1,062,299 A 372,786 A 1,008,195 A 887,863 A 301,863 M
Not stated 154,426 M 115,783 M 264,383 A 129,641 M 207,265 A 84,511 M 139,451 M - U - U
Households made improvement(s) to exterior doors (including garage doors)
5 years or less (January 1st, 2015 - December 31st, 2019) 121,668 M 155,174 A 409,193 A 139,748 A 292,678 A 60,248 M 163,211 M - U - U
No improvements made 495,345 A 486,842 A 953,760 A 399,641 A 783,871 A 365,676 A 620,290 A 219,213 A - U
Valid Skip Footnote 2 717,688 A 1,015,338 A 1,832,639 A 890,966 A 1,062,299 A 372,786 A 1,008,195 A 887,863 A 301,863 M
Not stated 160,349 M 100,159 M 241,276 A 126,217 M 170,545 A 80,015 M 133,559 M - U - U
Households installed a programmable thermostat
5 years or less (January 1st, 2015 - December 31st, 2019) 173,073 M 206,240 A 493,778 A 155,716 M 292,675 A 148,493 M 189,819 A 96,508 M - U
No improvements made 454,426 A 428,499 A 895,882 A 393,619 A 770,618 A 284,699 A 601,007 A 150,541 M - U
Valid Skip Footnote 2 717,688 A 1,015,338 A 1,832,639 A 890,966 A 1,062,299 A 372,786 A 1,008,195 A 887,863 A 301,863 M
Not stated 149,863 M 107,435 M 214,569 A 116,271 M 183,799 A 72,747 M 126,233 M - U - U
Households installed solar photovoltaic panels
5 years or less (January 1st, 2015 - December 31st, 2019) - U - U - U - U - U - - - U - U - -
No improvements made 594,267 A 619,439 A 1,316,907 A 526,279 A 1,027,257 A 412,924 A 762,732 A 243,053 A - U
Valid Skip Footnote 2 717,688 A 1,015,338 A 1,832,639 A 890,966 A 1,062,299 A 372,786 A 1,008,195 A 887,863 A 301,863 M
Not stated 181,777 M 118,792 M 281,824 A 135,691 M 206,762 A 93,014 M 136,235 M - U - U
Households installed solar heating system
5 years or less (January 1st, 2015 - December 31st, 2019) - U - U - - - - - U - - - - - - - -
No improvements made 593,742 A 623,383 A 1,322,405 A 529,915 A 1,028,879 A 412,924 A 774,109 A 245,064 A - U
Valid Skip Footnote 2 717,688 A 1,015,338 A 1,832,639 A 890,966 A 1,062,299 A 372,786 A 1,008,195 A 887,863 A 301,863 M
Not stated 181,777 M 113,259 M 281,824 A 135,691 M 209,239 A 93,014 M 142,951 M - U - U
Households installed a drain-water heat recovery unit
5 years or less (January 1st, 2015 - December 31st, 2019) - - - U - U - U - U - U - - - - - -
No improvements made 595,585 A 623,383 A 1,322,284 A 527,670 A 1,030,128 A 411,895 A 774,109 A 245,064 A - U
Valid Skip Footnote 2 717,688 A 1,015,338 A 1,832,639 A 890,966 A 1,062,299 A 372,786 A 1,008,195 A 887,863 A 301,863 M
Not stated 181,777 M 113,259 M 281,382 A 135,691 M 209,239 A 93,014 M 142,951 M - U - U
Households made improvement(s) to the ventilation or central air conditioning equipment
5 years or less (January 1st, 2015 - December 31st, 2019) - U 124,067 A 290,593 A 103,009 A 268,580 A 106,336 M 209,934 M 65,688 M - U
No improvements made 504,633 A 503,900 A 1,080,984 A 440,118 A 799,211 A 315,100 A 583,990 A 179,375 A - U
Valid Skip Footnote 2 717,688 A 1,015,338 A 1,832,639 A 890,966 A 1,062,299 A 372,786 A 1,008,195 A 887,863 A 301,863 M
Not stated 162,196 M 114,207 M 232,653 A 122,479 M 179,302 A 84,502 M 123,136 M - U - U
Households made improvement(s) to the foundation
5 years or less (January 1st, 2015 - December 31st, 2019) 39,489 M - U - U - U - U - U - U - U - -
No improvements made 564,528 A 593,024 A 1,315,247 A 520,819 A 1,017,386 A 409,811 A 755,940 A 235,258 A - U
Valid Skip Footnote 2 717,688 A 1,015,338 A 1,832,639 A 890,966 A 1,062,299 A 372,786 A 1,008,195 A 887,863 A 301,863 M
Not stated 173,344 M 116,402 M 270,638 A 135,691 M 207,729 A 91,122 M 142,951 M - U - U
Households made other improvement(s)
5 years or less (January 1st, 2015 - December 31st, 2019) 106,217 M 116,223 M 210,684 A 93,906 M 167,084 A 86,381 M 179,027 M 48,266 M - U
No improvements made 492,223 A 514,375 A 1,122,255 A 441,743 A 877,946 A 326,543 A 608,917 A 200,642 A - U
Valid Skip Footnote 2 717,688 A 1,015,338 A 1,832,639 A 890,966 A 1,062,299 A 372,786 A 1,008,195 A 887,863 A 301,863 M
Not stated 178,921 M 111,577 M 271,289 A 129,958 M 202,063 A 93,014 M 129,115 M - U - U
Number of improvements made since January 1st, 2015
No improvements 366,473 A 318,648 A 604,021 A 244,353 A 421,074 A 165,542 A 494,943 A 445,661 A - U
1 to 3 401,329 A 398,658 A 947,833 A 376,335 A 678,979 A 287,044 M 618,625 A 184,347 A - U
4 to 6 109,164 M 105,194 M 238,490 A 88,256 M 222,730 A 86,786 M 105,032 M - U - U
7 or more - U - U 48,803 M - U - U - - - U - U - -
Valid Skip Footnote 1 351,215 A 696,690 A 1,228,618 A 646,612 A 641,225 A 207,244 M 513,253 A 442,201 A 289,468 M
Yes improvement but ’Not stated’ number of improvements 206,697 A 213,280 A 369,103 A 181,302 A 314,594 A 132,108 M 174,964 M 107,258 M - U
Main reason household did not make any improvements
No improvements are currently necessary 169,601 M 174,869 A 321,370 A 132,349 A 262,801 A 129,747 A 334,752 A 253,728 A - U
Planning to make improvements in the future - U - U 77,445 M - U 48,939 M - U 57,034 M - U - U
Not aware of government financial aid or assistance - U - U - U - U - U - - - U - U - U
Planning to sell - U - U - U - - - U - - - U - U - -
Dwelling was recently purchased or built - U - U - U - - - U - U - U 123,112 A - -
Improvements are too costly 65,162 M 54,860 M 95,898 M - U 52,491 M - U 57,888 M - U - U
Do not have time - U - U - U - U - U - - - U - - - -
No government financial aid or assistance - U - U - U - U - - - U - U - - - -
Other - U - U - U - U - U - U - U - U - -
Valid Skip Footnote 3 1,114,002 A 1,432,176 A 2,783,348 A 1,299,964 A 1,868,519 A 697,927 A 1,430,313 A 754,206 A 367,134 A
Don’t know/Not stated - U - U 78,486 M - U - U - U - U - U - U

Legend:

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

Notes:

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

Source:

2019 Survey of Household Energy Use