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) | 211.2 | 213.5 | 215.6 | 218.6 | 221.6 | 224.0 | 226.2 | 228.4 | 230.6 | 232.6 | 234.3 | 235.9 | 237.2 | 238.3 | 239.3 | 240.1 | 241.0 | 241.7 | |
Heating System Stock by Heating System Type (thousands) | |||||||||||||||||||
Heating Oil – Normal Efficiency | 14.0 | 10.3 | 6.9 | 3.9 | 0.9 | 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 | 26.3 | 29.9 | 33.3 | 35.1 | 37.6 | 37.6 | 37.5 | 37.2 | 36.8 | 36.5 | 36.2 | 35.9 | 35.6 | 35.2 | 34.5 | 33.4 | 32.1 | 30.7 | |
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 | 0.8 | 0.8 | 0.8 | 0.7 | 0.7 | 0.6 | 0.6 | 0.5 | 0.4 | 0.3 | 0.3 | 0.2 | 0.2 | 0.1 | 0.1 | 0.1 | 0.0 | 0.1 | |
Natural Gas – Medium Efficiency | 1.1 | 1.1 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.0 | 1.0 | 1.0 | |
Natural Gas – High Efficiency | 1.3 | 1.3 | 1.4 | 1.5 | 1.5 | 1.7 | 1.9 | 2.3 | 2.5 | 2.5 | 2.6 | 2.8 | 2.9 | 3.0 | 3.0 | 3.8 | 4.9 | 5.3 | |
Electric | 104.9 | 106.5 | 107.6 | 110.3 | 112.5 | 114.9 | 117.5 | 119.4 | 122.1 | 126.2 | 130.1 | 133.8 | 137.2 | 140.4 | 142.9 | 144.4 | 146.0 | 147.7 | |
Heat Pump | 5.4 | 5.7 | 6.0 | 6.3 | 6.7 | 6.9 | 7.2 | 7.4 | 7.6 | 7.9 | 8.1 | 8.4 | 8.6 | 8.9 | 9.1 | 9.3 | 9.4 | 9.7 | |
Other1 | 0.7 | 0.7 | 0.7 | 1.5 | 2.2 | 2.9 | 3.5 | 4.1 | 4.6 | 5.2 | 4.9 | 4.7 | 4.4 | 4.2 | 3.9 | 3.7 | 3.4 | 3.2 | |
Wood | 9.6 | 10.0 | 10.6 | 10.7 | 10.7 | 10.9 | 10.0 | 9.9 | 9.1 | 7.1 | 5.4 | 3.7 | 2.1 | 0.4 | 0.0 | 0.0 | 0.0 | 0.0 | |
Dual Systems | |||||||||||||||||||
Wood/Electric | 32.3 | 32.4 | 32.4 | 32.5 | 32.5 | 32.3 | 32.0 | 31.7 | 31.5 | 31.2 | 31.0 | 30.8 | 30.7 | 30.6 | 30.4 | 30.1 | 29.9 | 29.9 | |
Wood/Heating Oil | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.3 | 13.2 | 13.1 | 13.0 | 12.9 | 12.8 | 12.7 | 12.7 | 12.6 | 12.5 | 12.4 | 12.3 | 12.3 | |
Natural Gas/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 | |
Heating Oil/Electric | 1.4 | 1.4 | 1.5 | 1.5 | 1.6 | 1.6 | 1.6 | 1.7 | 1.7 | 1.7 | 1.7 | 1.8 | 1.8 | 1.8 | 1.9 | 1.9 | 1.9 | 1.9 | |
Shares (%) | |||||||||||||||||||
Heating Oil – Normal Efficiency | 6.6 | 4.8 | 3.2 | 1.8 | 0.4 | 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 | 12.5 | 14.0 | 15.4 | 16.1 | 17.0 | 16.8 | 16.6 | 16.3 | 16.0 | 15.7 | 15.4 | 15.2 | 15.0 | 14.8 | 14.4 | 13.9 | 13.3 | 12.7 | |
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 | 0.4 | 0.4 | 0.4 | 0.3 | 0.3 | 0.3 | 0.3 | 0.2 | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.4 | 0.4 | 0.4 | 0.4 | |
Natural Gas – High Efficiency | 0.6 | 0.6 | 0.6 | 0.7 | 0.7 | 0.7 | 0.9 | 1.0 | 1.1 | 1.1 | 1.1 | 1.2 | 1.2 | 1.2 | 1.3 | 1.6 | 2.0 | 2.2 | |
Electric | 49.6 | 49.9 | 49.9 | 50.4 | 50.8 | 51.3 | 51.9 | 52.3 | 53.0 | 54.3 | 55.5 | 56.7 | 57.8 | 58.9 | 59.7 | 60.2 | 60.6 | 61.1 | |
Heat Pump | 2.6 | 2.7 | 2.8 | 2.9 | 3.0 | 3.1 | 3.2 | 3.2 | 3.3 | 3.4 | 3.5 | 3.5 | 3.6 | 3.7 | 3.8 | 3.9 | 3.9 | 4.0 | |
Other1 | 0.3 | 0.3 | 0.3 | 0.7 | 1.0 | 1.3 | 1.5 | 1.8 | 2.0 | 2.2 | 2.1 | 2.0 | 1.9 | 1.7 | 1.6 | 1.5 | 1.4 | 1.3 | |
Wood | 4.6 | 4.7 | 4.9 | 4.9 | 4.8 | 4.9 | 4.4 | 4.4 | 4.0 | 3.0 | 2.3 | 1.6 | 0.9 | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 | |
Dual Systems | |||||||||||||||||||
Wood/Electric | 15.3 | 15.2 | 15.0 | 14.8 | 14.7 | 14.4 | 14.2 | 13.9 | 13.7 | 13.4 | 13.2 | 13.1 | 12.9 | 12.8 | 12.7 | 12.5 | 12.4 | 12.4 | |
Wood/Heating Oil | 6.3 | 6.3 | 6.2 | 6.1 | 6.1 | 6.0 | 5.8 | 5.7 | 5.6 | 5.5 | 5.5 | 5.4 | 5.3 | 5.3 | 5.2 | 5.2 | 5.1 | 5.1 | |
Natural Gas/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 | |
Heating Oil/Electric | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 |