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) | 302.3 | 304.6 | 307.1 | 309.8 | 312.9 | 316.3 | 319.5 | 322.7 | 326.0 | 328.8 | 332.4 | 335.6 | 338.5 | 342.0 | 344.7 | 347.2 | 349.2 | 351.7 | |
Heating System Stock by Heating System Type (thousands) | |||||||||||||||||||
Heating Oil – Normal Efficiency | 1.4 | 0.8 | 0.4 | 0.2 | 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 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.2 | 4.2 | 4.0 | 3.8 | 3.5 | 3.1 | |
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 | 83.9 | 77.6 | 71.2 | 64.7 | 57.9 | 51.1 | 44.5 | 37.9 | 31.6 | 25.8 | 20.5 | 15.0 | 9.9 | 5.4 | 1.2 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 49.4 | 52.9 | 55.8 | 58.5 | 60.6 | 62.4 | 64.2 | 66.1 | 66.6 | 66.9 | 66.3 | 65.4 | 64.2 | 62.4 | 60.1 | 56.8 | 53.0 | 48.8 | |
Natural Gas – High Efficiency | 40.5 | 45.6 | 50.5 | 56.1 | 61.4 | 66.9 | 73.6 | 78.5 | 84.2 | 90.4 | 97.3 | 104.0 | 110.3 | 116.9 | 123.1 | 128.3 | 132.9 | 138.1 | |
Electric | 89.7 | 90.0 | 91.5 | 91.7 | 94.2 | 97.0 | 98.5 | 101.6 | 105.0 | 107.3 | 110.2 | 113.0 | 115.5 | 118.3 | 120.8 | 122.4 | 123.7 | 125.2 | |
Heat Pump | 7.0 | 7.3 | 7.7 | 8.1 | 8.5 | 8.9 | 9.3 | 9.7 | 10.1 | 10.5 | 10.9 | 11.3 | 11.7 | 12.2 | 12.6 | 12.9 | 13.2 | 13.6 | |
Other1 | 2.9 | 2.9 | 2.9 | 2.9 | 2.9 | 2.8 | 2.8 | 2.7 | 2.6 | 2.5 | 2.3 | 2.2 | 2.1 | 2.0 | 1.9 | 1.7 | 1.6 | 1.5 | |
Wood | 5.7 | 5.4 | 4.8 | 5.0 | 4.6 | 4.0 | 3.3 | 2.6 | 2.0 | 1.3 | 0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Dual Systems | |||||||||||||||||||
Wood/Electric | 13.9 | 14.1 | 14.3 | 14.5 | 14.7 | 14.9 | 15.0 | 15.2 | 15.4 | 15.6 | 15.7 | 15.9 | 16.0 | 16.2 | 16.4 | 16.5 | 16.5 | 16.6 | |
Wood/Heating Oil | 2.2 | 2.3 | 2.3 | 2.3 | 2.4 | 2.4 | 2.4 | 2.5 | 2.5 | 2.5 | 2.6 | 2.6 | 2.6 | 2.7 | 2.7 | 2.7 | 2.7 | 2.8 | |
Natural Gas/Electric | 0.3 | 0.3 | 0.3 | 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 | |
Heating Oil/Electric | 1.0 | 1.0 | 1.1 | 1.1 | 1.1 | 1.2 | 1.2 | 1.3 | 1.3 | 1.3 | 1.4 | 1.4 | 1.4 | 1.5 | 1.5 | 1.5 | 1.5 | 1.6 | |
Shares (%) | |||||||||||||||||||
Heating Oil – Normal Efficiency | 0.5 | 0.3 | 0.1 | 0.1 | 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 | 1.4 | 1.4 | 1.4 | 1.4 | 1.4 | 1.4 | 1.4 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.2 | 1.2 | 1.1 | 1.0 | 0.9 | |
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 | 27.7 | 25.5 | 23.2 | 20.9 | 18.5 | 16.2 | 13.9 | 11.7 | 9.7 | 7.8 | 6.2 | 4.5 | 2.9 | 1.6 | 0.4 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 16.3 | 17.4 | 18.2 | 18.9 | 19.4 | 19.7 | 20.1 | 20.5 | 20.4 | 20.4 | 19.9 | 19.5 | 19.0 | 18.2 | 17.4 | 16.4 | 15.2 | 13.9 | |
Natural Gas – High Efficiency | 13.4 | 15.0 | 16.4 | 18.1 | 19.6 | 21.1 | 23.0 | 24.3 | 25.8 | 27.5 | 29.3 | 31.0 | 32.6 | 34.2 | 35.7 | 37.0 | 38.1 | 39.3 | |
Electric | 29.7 | 29.5 | 29.8 | 29.6 | 30.1 | 30.7 | 30.8 | 31.5 | 32.2 | 32.6 | 33.2 | 33.7 | 34.1 | 34.6 | 35.0 | 35.3 | 35.4 | 35.6 | |
Heat Pump | 2.3 | 2.4 | 2.5 | 2.6 | 2.7 | 2.8 | 2.9 | 3.0 | 3.1 | 3.2 | 3.3 | 3.4 | 3.5 | 3.6 | 3.6 | 3.7 | 3.8 | 3.9 | |
Other1 | 1.0 | 1.0 | 1.0 | 0.9 | 0.9 | 0.9 | 0.9 | 0.8 | 0.8 | 0.7 | 0.7 | 0.7 | 0.6 | 0.6 | 0.5 | 0.5 | 0.5 | 0.4 | |
Wood | 1.9 | 1.8 | 1.6 | 1.6 | 1.5 | 1.3 | 1.0 | 0.8 | 0.6 | 0.4 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Dual Systems | |||||||||||||||||||
Wood/Electric | 4.6 | 4.6 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.8 | 4.7 | 4.7 | 4.7 | |
Wood/Heating Oil | 0.7 | 0.7 | 0.7 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | |
Natural Gas/Electric | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | |
Heating Oil/Electric | 0.3 | 0.3 | 0.3 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 |