2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Total Heating System Stock (thousands) | 1,641.2 | 1,653.7 | 1,671.8 | 1,692.3 | 1,719.9 | 1,751.0 | 1,782.8 | 1,817.0 | 1,849.4 | 1,878.7 | 1,903.4 | 1,925.2 | 1,948.3 | 1,972.6 | 1,995.9 | 2,018.7 | 2,043.7 | |
Heating System Stock by Building Type (thousands) | ||||||||||||||||||
Single Detached | 886.2 | 892.0 | 898.7 | 906.9 | 916.1 | 925.8 | 937.3 | 948.1 | 956.5 | 963.0 | 970.5 | 977.8 | 983.4 | 990.0 | 995.6 | 1,000.8 | 1,006.6 | |
Single Attached | 174.1 | 176.6 | 179.6 | 184.3 | 189.7 | 195.8 | 202.0 | 208.9 | 214.5 | 221.1 | 225.8 | 230.7 | 235.7 | 240.0 | 244.6 | 248.9 | 254.3 | |
Apartments | 518.7 | 522.5 | 530.4 | 537.4 | 549.8 | 564.5 | 577.7 | 593.5 | 611.3 | 626.9 | 638.9 | 648.1 | 660.2 | 673.1 | 685.9 | 698.7 | 712.2 | |
Mobile Homes | 62.2 | 62.6 | 63.1 | 63.6 | 64.3 | 65.0 | 65.8 | 66.5 | 67.1 | 67.7 | 68.2 | 68.6 | 69.0 | 69.5 | 69.9 | 70.2 | 70.6 | |
Shares (%) | ||||||||||||||||||
Single Detached | 54.0 | 53.9 | 53.8 | 53.6 | 53.3 | 52.9 | 52.6 | 52.2 | 51.7 | 51.3 | 51.0 | 50.8 | 50.5 | 50.2 | 49.9 | 49.6 | 49.3 | |
Single Attached | 10.6 | 10.7 | 10.7 | 10.9 | 11.0 | 11.2 | 11.3 | 11.5 | 11.6 | 11.8 | 11.9 | 12.0 | 12.1 | 12.2 | 12.3 | 12.3 | 12.4 | |
Apartments | 31.6 | 31.6 | 31.7 | 31.8 | 32.0 | 32.2 | 32.4 | 32.7 | 33.1 | 33.4 | 33.6 | 33.7 | 33.9 | 34.1 | 34.4 | 34.6 | 34.8 | |
Mobile Homes | 3.8 | 3.8 | 3.8 | 3.8 | 3.7 | 3.7 | 3.7 | 3.7 | 3.6 | 3.6 | 3.6 | 3.6 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | |
Heating System Stock by Heating System Type (thousands) | ||||||||||||||||||
Heating Oil – Normal Efficiency | 54.7 | 45.6 | 36.6 | 27.6 | 23.1 | 19.2 | 15.9 | 12.5 | 9.4 | 7.5 | 5.7 | 3.9 | 4.2 | 3.2 | 3.2 | 3.0 | 2.4 | |
Heating Oil – Medium Efficiency | 36.5 | 45.1 | 50.8 | 54.5 | 59.9 | 64.6 | 69.2 | 71.2 | 71.3 | 72.0 | 72.4 | 75.0 | 74.9 | 75.9 | 75.4 | 74.4 | 73.8 | |
Heating Oil – High Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Normal Efficiency | 404.2 | 376.7 | 348.0 | 317.8 | 282.9 | 248.4 | 213.0 | 180.9 | 150.3 | 117.9 | 92.7 | 68.6 | 45.3 | 26.1 | 15.7 | 6.5 | 2.2 | |
Natural Gas – Medium Efficiency | 314.6 | 333.6 | 359.8 | 388.6 | 416.7 | 443.9 | 468.3 | 491.2 | 506.9 | 520.2 | 519.5 | 517.1 | 512.9 | 503.9 | 489.8 | 472.1 | 451.3 | |
Natural Gas – High Efficiency | 170.2 | 181.4 | 197.9 | 217.2 | 237.6 | 258.5 | 278.1 | 297.1 | 324.4 | 344.6 | 365.1 | 382.2 | 401.0 | 421.2 | 441.2 | 463.3 | 482.9 | |
Electric | 460.9 | 463.0 | 463.3 | 465.9 | 473.8 | 486.9 | 503.6 | 524.5 | 546.0 | 572.9 | 601.5 | 628.8 | 657.8 | 687.3 | 714.4 | 742.0 | 771.8 | |
Heat Pump | 37.2 | 39.1 | 40.9 | 42.8 | 44.7 | 46.7 | 48.9 | 51.1 | 53.0 | 55.1 | 57.1 | 59.1 | 61.0 | 63.0 | 64.6 | 66.3 | 68.1 | |
Other1 | 30.5 | 31.4 | 32.2 | 32.2 | 32.1 | 31.7 | 31.1 | 30.5 | 29.6 | 28.5 | 27.2 | 26.1 | 24.9 | 23.8 | 22.7 | 21.5 | 20.5 | |
Wood | 22.7 | 25.0 | 26.2 | 26.8 | 27.9 | 27.7 | 28.8 | 29.6 | 28.0 | 27.3 | 27.0 | 26.8 | 26.5 | 26.2 | 25.9 | 25.5 | 25.1 | |
Dual Systems | ||||||||||||||||||
Wood/Electric | 65.0 | 66.8 | 68.4 | 70.0 | 71.3 | 72.4 | 73.8 | 75.1 | 76.1 | 77.3 | 78.6 | 79.8 | 81.1 | 82.2 | 82.7 | 83.2 | 84.0 | |
Wood/Heating Oil | 25.2 | 25.9 | 26.5 | 27.1 | 27.6 | 28.1 | 28.6 | 29.1 | 29.5 | 30.0 | 30.5 | 31.0 | 31.5 | 31.9 | 32.1 | 32.3 | 32.6 | |
Natural Gas/Electric | 13.4 | 13.9 | 14.4 | 14.9 | 15.3 | 15.7 | 16.1 | 16.5 | 16.9 | 17.3 | 17.7 | 18.1 | 18.5 | 18.9 | 19.1 | 19.3 | 19.6 | |
Heating Oil/Electric | 6.1 | 6.4 | 6.6 | 6.9 | 7.1 | 7.3 | 7.6 | 7.8 | 8.0 | 8.2 | 8.4 | 8.6 | 8.8 | 9.0 | 9.2 | 9.3 | 9.5 | |
Shares (%) | ||||||||||||||||||
Heating Oil – Normal Efficiency | 3.3 | 2.8 | 2.2 | 1.6 | 1.3 | 1.1 | 0.9 | 0.7 | 0.5 | 0.4 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 | 0.1 | 0.1 | |
Heating Oil – Medium Efficiency | 2.2 | 2.7 | 3.0 | 3.2 | 3.5 | 3.7 | 3.9 | 3.9 | 3.9 | 3.8 | 3.8 | 3.9 | 3.8 | 3.8 | 3.8 | 3.7 | 3.6 | |
Heating Oil – High Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Normal Efficiency | 24.6 | 22.8 | 20.8 | 18.8 | 16.4 | 14.2 | 11.9 | 10.0 | 8.1 | 6.3 | 4.9 | 3.6 | 2.3 | 1.3 | 0.8 | 0.3 | 0.1 | |
Natural Gas – Medium Efficiency | 19.2 | 20.2 | 21.5 | 23.0 | 24.2 | 25.4 | 26.3 | 27.0 | 27.4 | 27.7 | 27.3 | 26.9 | 26.3 | 25.5 | 24.5 | 23.4 | 22.1 | |
Natural Gas – High Efficiency | 10.4 | 11.0 | 11.8 | 12.8 | 13.8 | 14.8 | 15.6 | 16.4 | 17.5 | 18.3 | 19.2 | 19.9 | 20.6 | 21.4 | 22.1 | 22.9 | 23.6 | |
Electric | 28.1 | 28.0 | 27.7 | 27.5 | 27.5 | 27.8 | 28.2 | 28.9 | 29.5 | 30.5 | 31.6 | 32.7 | 33.8 | 34.8 | 35.8 | 36.8 | 37.8 | |
Heat Pump | 2.3 | 2.4 | 2.4 | 2.5 | 2.6 | 2.7 | 2.7 | 2.8 | 2.9 | 2.9 | 3.0 | 3.1 | 3.1 | 3.2 | 3.2 | 3.3 | 3.3 | |
Other1 | 1.9 | 1.9 | 1.9 | 1.9 | 1.9 | 1.8 | 1.7 | 1.7 | 1.6 | 1.5 | 1.4 | 1.4 | 1.3 | 1.2 | 1.1 | 1.1 | 1.0 | |
Wood | 1.4 | 1.5 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.5 | 1.5 | 1.4 | 1.4 | 1.4 | 1.3 | 1.3 | 1.3 | 1.2 | |
Dual Systems | ||||||||||||||||||
Wood/Electric | 4.0 | 4.0 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.2 | 4.2 | 4.1 | 4.1 | 4.1 | |
Wood/Heating Oil | 1.5 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | |
Natural Gas/Electric | 0.8 | 0.8 | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 | 1.0 | 1.0 | 1.0 | 1.0 | |
Heating Oil/Electric | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |