2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Total Single Attached Heating System Stock (thousands) | 167.9 | 170.4 | 173.4 | 177.8 | 183.2 | 189.2 | 195.5 | 201.8 | 207.4 | 213.9 | 218.4 | 222.8 | 227.6 | 231.8 | 236.1 | 240.5 | 245.7 | 250.8 | |
Heating System Stock by Heating System Type (thousands) | |||||||||||||||||||
Heating Oil – Normal Efficiency | 6.7 | 5.8 | 4.9 | 3.9 | 3.0 | 2.2 | 1.5 | 0.8 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 2.9 | 3.8 | 4.4 | 4.9 | 5.5 | 6.0 | 6.5 | 6.6 | 6.6 | 6.6 | 6.6 | 6.5 | 6.5 | 6.5 | 6.4 | 6.3 | 6.2 | 6.0 | |
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 | 41.5 | 39.6 | 37.4 | 34.8 | 31.7 | 28.4 | 24.9 | 21.6 | 18.4 | 14.9 | 12.2 | 9.5 | 6.9 | 4.5 | 2.2 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 34.0 | 35.8 | 38.4 | 41.8 | 45.5 | 49.2 | 52.6 | 56.0 | 58.2 | 60.4 | 60.3 | 60.1 | 59.6 | 58.6 | 57.2 | 55.5 | 53.0 | 50.2 | |
Natural Gas – High Efficiency | 19.5 | 20.6 | 22.3 | 24.8 | 27.6 | 30.6 | 33.5 | 36.4 | 40.4 | 43.8 | 47.0 | 50.0 | 53.3 | 56.4 | 59.8 | 63.4 | 66.5 | 70.1 | |
Electric | 50.3 | 50.9 | 51.3 | 52.4 | 54.2 | 56.7 | 59.7 | 63.1 | 66.6 | 70.9 | 75.0 | 79.2 | 83.7 | 88.0 | 92.6 | 97.3 | 102.0 | 106.5 | |
Heat Pump | 3.1 | 3.2 | 3.4 | 3.6 | 3.9 | 4.1 | 4.4 | 4.7 | 5.0 | 5.3 | 5.5 | 5.8 | 6.0 | 6.3 | 6.6 | 6.8 | 7.1 | 7.4 | |
Other1 | 2.9 | 3.0 | 3.1 | 3.1 | 3.2 | 3.2 | 3.2 | 3.2 | 3.1 | 3.0 | 2.9 | 2.7 | 2.6 | 2.5 | 2.4 | 2.3 | 2.1 | 2.0 | |
Wood | 5.5 | 6.1 | 6.4 | 6.6 | 6.9 | 6.9 | 7.3 | 7.5 | 7.1 | 6.9 | 6.9 | 6.8 | 6.8 | 6.7 | 6.6 | 6.5 | 6.4 | 6.3 | |
Dual Systems | |||||||||||||||||||
Wood/Electric | 1.1 | 1.1 | 1.1 | 1.2 | 1.2 | 1.2 | 1.2 | 1.3 | 1.3 | 1.3 | 1.3 | 1.4 | 1.4 | 1.4 | 1.5 | 1.5 | 1.5 | 1.5 | |
Wood/Heating Oil | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | |
Natural Gas/Electric | 0.4 | 0.4 | 0.4 | 0.4 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.7 | 0.7 | 0.7 | 0.7 | |
Heating Oil/Electric | 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 | |
Shares (%) | |||||||||||||||||||
Heating Oil – Normal Efficiency | 4.0 | 3.4 | 2.8 | 2.2 | 1.6 | 1.1 | 0.7 | 0.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 1.7 | 2.2 | 2.5 | 2.8 | 3.0 | 3.2 | 3.3 | 3.3 | 3.2 | 3.1 | 3.0 | 2.9 | 2.9 | 2.8 | 2.7 | 2.6 | 2.5 | 2.4 | |
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 | 24.7 | 23.2 | 21.6 | 19.6 | 17.3 | 15.0 | 12.7 | 10.7 | 8.9 | 7.0 | 5.6 | 4.3 | 3.0 | 2.0 | 1.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 20.2 | 21.0 | 22.1 | 23.5 | 24.8 | 26.0 | 26.9 | 27.7 | 28.1 | 28.2 | 27.6 | 27.0 | 26.2 | 25.3 | 24.2 | 23.1 | 21.6 | 20.0 | |
Natural Gas – High Efficiency | 11.6 | 12.1 | 12.9 | 14.0 | 15.0 | 16.2 | 17.1 | 18.0 | 19.5 | 20.5 | 21.5 | 22.4 | 23.4 | 24.3 | 25.3 | 26.4 | 27.1 | 27.9 | |
Electric | 29.9 | 29.9 | 29.6 | 29.5 | 29.6 | 30.0 | 30.5 | 31.3 | 32.1 | 33.2 | 34.4 | 35.5 | 36.8 | 38.0 | 39.2 | 40.5 | 41.5 | 42.5 | |
Heat Pump | 1.8 | 1.9 | 2.0 | 2.0 | 2.1 | 2.2 | 2.3 | 2.3 | 2.4 | 2.5 | 2.5 | 2.6 | 2.7 | 2.7 | 2.8 | 2.8 | 2.9 | 2.9 | |
Other1 | 1.7 | 1.8 | 1.8 | 1.8 | 1.7 | 1.7 | 1.6 | 1.6 | 1.5 | 1.4 | 1.3 | 1.2 | 1.2 | 1.1 | 1.0 | 0.9 | 0.9 | 0.8 | |
Wood | 3.3 | 3.6 | 3.7 | 3.7 | 3.8 | 3.6 | 3.7 | 3.7 | 3.4 | 3.2 | 3.1 | 3.1 | 3.0 | 2.9 | 2.8 | 2.7 | 2.6 | 2.5 | |
Dual Systems | |||||||||||||||||||
Wood/Electric | 0.6 | 0.6 | 0.7 | 0.7 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | |
Wood/Heating Oil | 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 | |
Natural Gas/Electric | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | |
Heating Oil/Electric | 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 |