2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Total Single Detached Heating System Stock (thousands) | 1,443.8 | 1,458.5 | 1,480.8 | 1,504.7 | 1,531.5 | 1,552.7 | 1,572.9 | 1,593.1 | 1,610.7 | 1,625.7 | 1,642.6 | 1,656.4 | 1,670.5 | 1,682.0 | 1,691.5 | 1,699.3 | 1,706.9 | 1,714.4 | |
Heating System Stock by Heating System Type (thousands) | |||||||||||||||||||
Heating Oil – Normal 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 | 0.0 | |
Heating Oil – Medium Efficiency | 137.0 | 139.1 | 145.6 | 144.8 | 144.3 | 142.8 | 141.1 | 139.2 | 138.0 | 136.7 | 135.1 | 133.1 | 130.9 | 128.1 | 124.3 | 119.3 | 112.7 | 104.6 | |
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 | 0.0 | |
Natural Gas – Normal Efficiency | 51.7 | 50.2 | 45.7 | 41.1 | 35.3 | 29.0 | 22.5 | 15.9 | 9.9 | 4.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 8.1 | 8.2 | 8.5 | 9.3 | 10.6 | 11.5 | 12.1 | 12.4 | 12.5 | 12.5 | 12.0 | 11.4 | 10.9 | 10.3 | 9.7 | 9.1 | 8.5 | 8.0 | |
Natural Gas – High Efficiency | 10.7 | 11.0 | 11.7 | 14.0 | 18.4 | 22.4 | 27.2 | 34.5 | 39.5 | 44.7 | 50.4 | 55.1 | 59.1 | 62.4 | 65.1 | 66.8 | 69.2 | 70.5 | |
Electric | 617.5 | 623.4 | 635.5 | 652.4 | 668.8 | 684.2 | 704.3 | 720.9 | 733.1 | 741.8 | 750.8 | 755.3 | 760.2 | 763.3 | 765.4 | 766.9 | 768.4 | 771.0 | |
Heat Pump | 120.7 | 125.3 | 130.3 | 135.7 | 141.2 | 146.3 | 150.9 | 155.6 | 160.5 | 165.2 | 169.6 | 173.6 | 177.7 | 181.8 | 185.8 | 190.0 | 194.3 | 199.1 | |
Other1 | 1.9 | 1.9 | 1.9 | 1.9 | 1.9 | 1.9 | 2.0 | 2.1 | 2.3 | 2.5 | 2.8 | 3.1 | 3.4 | 3.7 | 4.1 | 4.6 | 5.0 | 5.5 | |
Wood | 21.9 | 18.6 | 16.2 | 15.0 | 15.2 | 14.3 | 8.5 | 4.8 | 2.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Dual Systems | |||||||||||||||||||
Wood/Electric | 313.1 | 316.2 | 318.2 | 320.5 | 322.9 | 324.9 | 326.5 | 327.7 | 330.2 | 332.6 | 334.2 | 335.2 | 336.7 | 338.5 | 340.7 | 343.5 | 346.6 | 350.4 | |
Wood/Heating Oil | 80.2 | 81.0 | 81.5 | 82.1 | 82.7 | 83.2 | 83.6 | 84.0 | 84.6 | 85.2 | 85.6 | 85.9 | 86.3 | 86.7 | 87.3 | 88.0 | 88.8 | 89.8 | |
Natural Gas/Electric | 6.5 | 6.8 | 7.1 | 7.3 | 7.5 | 7.8 | 8.0 | 8.2 | 8.4 | 8.6 | 8.8 | 9.0 | 9.2 | 9.4 | 9.6 | 9.8 | 10.1 | 10.3 | |
Heating Oil/Electric | 74.4 | 76.6 | 78.6 | 80.6 | 82.6 | 84.5 | 86.2 | 87.8 | 89.7 | 91.6 | 93.2 | 94.6 | 96.2 | 97.8 | 99.5 | 101.3 | 103.3 | 105.4 | |
Shares (%) | |||||||||||||||||||
Heating Oil – Normal 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 | 0.0 | |
Heating Oil – Medium Efficiency | 9.5 | 9.5 | 9.8 | 9.6 | 9.4 | 9.2 | 9.0 | 8.7 | 8.6 | 8.4 | 8.2 | 8.0 | 7.8 | 7.6 | 7.4 | 7.0 | 6.6 | 6.1 | |
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 | 0.0 | |
Natural Gas – Normal Efficiency | 3.6 | 3.4 | 3.1 | 2.7 | 2.3 | 1.9 | 1.4 | 1.0 | 0.6 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 0.6 | 0.6 | 0.6 | 0.6 | 0.7 | 0.7 | 0.8 | 0.8 | 0.8 | 0.8 | 0.7 | 0.7 | 0.7 | 0.6 | 0.6 | 0.5 | 0.5 | 0.5 | |
Natural Gas – High Efficiency | 0.7 | 0.8 | 0.8 | 0.9 | 1.2 | 1.4 | 1.7 | 2.2 | 2.5 | 2.8 | 3.1 | 3.3 | 3.5 | 3.7 | 3.9 | 3.9 | 4.1 | 4.1 | |
Electric | 42.8 | 42.7 | 42.9 | 43.4 | 43.7 | 44.1 | 44.8 | 45.3 | 45.5 | 45.6 | 45.7 | 45.6 | 45.5 | 45.4 | 45.2 | 45.1 | 45.0 | 45.0 | |
Heat Pump | 8.4 | 8.6 | 8.8 | 9.0 | 9.2 | 9.4 | 9.6 | 9.8 | 10.0 | 10.2 | 10.3 | 10.5 | 10.6 | 10.8 | 11.0 | 11.2 | 11.4 | 11.6 | |
Other1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 0.3 | 0.3 | |
Wood | 1.5 | 1.3 | 1.1 | 1.0 | 1.0 | 0.9 | 0.5 | 0.3 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Dual Systems | |||||||||||||||||||
Wood/Electric | 21.7 | 21.7 | 21.5 | 21.3 | 21.1 | 20.9 | 20.8 | 20.6 | 20.5 | 20.5 | 20.3 | 20.2 | 20.2 | 20.1 | 20.1 | 20.2 | 20.3 | 20.4 | |
Wood/Heating Oil | 5.6 | 5.6 | 5.5 | 5.5 | 5.4 | 5.4 | 5.3 | 5.3 | 5.3 | 5.2 | 5.2 | 5.2 | 5.2 | 5.2 | 5.2 | 5.2 | 5.2 | 5.2 | |
Natural Gas/Electric | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | |
Heating Oil/Electric | 5.2 | 5.3 | 5.3 | 5.4 | 5.4 | 5.4 | 5.5 | 5.5 | 5.6 | 5.6 | 5.7 | 5.7 | 5.8 | 5.8 | 5.9 | 6.0 | 6.0 | 6.1 |