2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Total Heating System Stock (thousands) | 296.4 | 299.6 | 302.6 | 306.5 | 311.6 | 315.2 | 318.7 | 322.6 | 326.3 | 329.8 | 332.8 | 336.1 | 339.2 | 342.1 | 344.3 | 345.8 | 348.1 | 349.3 | |
Heating System Stock by Building Type (thousands) | |||||||||||||||||||
Single Detached | 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 | |
Single Attached | 15.5 | 15.7 | 15.9 | 16.1 | 16.8 | 17.2 | 17.9 | 18.6 | 19.4 | 20.1 | 20.6 | 21.3 | 22.1 | 22.6 | 23.0 | 23.3 | 23.6 | 23.9 | |
Apartments | 54.7 | 55.3 | 55.8 | 56.2 | 57.5 | 58.1 | 58.5 | 59.5 | 60.0 | 60.7 | 61.4 | 62.3 | 63.3 | 64.4 | 65.1 | 65.5 | 66.5 | 66.7 | |
Mobile Homes | 15.0 | 15.1 | 15.3 | 15.5 | 15.7 | 15.9 | 16.0 | 16.2 | 16.3 | 16.4 | 16.5 | 16.6 | 16.7 | 16.8 | 16.9 | 16.9 | 17.0 | 17.0 | |
Shares (%) | |||||||||||||||||||
Single Detached | 71.3 | 71.3 | 71.3 | 71.3 | 71.1 | 71.1 | 71.0 | 70.8 | 70.7 | 70.5 | 70.4 | 70.2 | 69.9 | 69.7 | 69.5 | 69.4 | 69.2 | 69.2 | |
Single Attached | 5.2 | 5.2 | 5.3 | 5.3 | 5.4 | 5.5 | 5.6 | 5.8 | 5.9 | 6.1 | 6.2 | 6.3 | 6.5 | 6.6 | 6.7 | 6.7 | 6.8 | 6.8 | |
Apartments | 18.5 | 18.4 | 18.4 | 18.3 | 18.5 | 18.4 | 18.4 | 18.4 | 18.4 | 18.4 | 18.4 | 18.5 | 18.6 | 18.8 | 18.9 | 18.9 | 19.1 | 19.1 | |
Mobile Homes | 5.1 | 5.1 | 5.1 | 5.1 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 | |
Heating System Stock by Heating System Type (thousands) | |||||||||||||||||||
Heating Oil – Normal Efficiency | 23.0 | 18.2 | 13.6 | 9.7 | 5.7 | 3.8 | 3.0 | 2.2 | 1.6 | 0.9 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 36.3 | 41.0 | 45.5 | 47.8 | 51.4 | 51.5 | 51.5 | 51.2 | 50.9 | 50.4 | 50.1 | 49.7 | 49.2 | 48.6 | 47.6 | 46.1 | 44.2 | 42.0 | |
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 | 1.2 | 1.2 | 1.1 | 1.1 | 1.0 | 0.9 | 0.8 | 0.7 | 0.6 | 0.5 | 0.4 | 0.3 | 0.2 | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | |
Natural Gas – Medium Efficiency | 1.7 | 1.7 | 1.7 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | |
Natural Gas – High Efficiency | 1.7 | 1.8 | 1.9 | 2.0 | 2.1 | 2.2 | 2.6 | 3.1 | 3.3 | 3.4 | 3.6 | 3.8 | 3.9 | 4.1 | 4.2 | 5.4 | 6.9 | 7.4 | |
Electric | 151.8 | 154.1 | 155.8 | 159.4 | 163.1 | 167.0 | 171.4 | 175.2 | 179.8 | 186.5 | 193.0 | 199.3 | 205.3 | 211.1 | 215.6 | 218.7 | 222.4 | 225.1 | |
Heat Pump | 6.4 | 6.7 | 7.1 | 7.5 | 7.9 | 8.2 | 8.6 | 8.9 | 9.2 | 9.5 | 9.9 | 10.2 | 10.6 | 10.9 | 11.2 | 11.5 | 11.7 | 12.1 | |
Other1 | 1.0 | 1.0 | 1.0 | 2.1 | 3.1 | 4.1 | 4.9 | 5.8 | 6.6 | 7.4 | 7.1 | 6.8 | 6.4 | 6.1 | 5.7 | 5.4 | 5.1 | 4.7 | |
Wood | 24.3 | 24.8 | 25.7 | 25.9 | 26.0 | 26.4 | 25.2 | 25.3 | 24.3 | 21.5 | 19.2 | 17.0 | 14.7 | 12.4 | 11.4 | 10.6 | 10.0 | 10.0 | |
Dual Systems | |||||||||||||||||||
Wood/Electric | 33.1 | 33.2 | 33.2 | 33.3 | 33.3 | 33.2 | 32.9 | 32.5 | 32.3 | 32.0 | 31.8 | 31.7 | 31.5 | 31.4 | 31.2 | 30.9 | 30.7 | 30.7 | |
Wood/Heating Oil | 14.2 | 14.2 | 14.2 | 14.2 | 14.3 | 14.2 | 14.1 | 13.9 | 13.8 | 13.7 | 13.6 | 13.5 | 13.5 | 13.4 | 13.4 | 13.2 | 13.1 | 13.1 | |
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 | 1.6 | 1.7 | 1.7 | 1.8 | 1.8 | 1.9 | 1.9 | 1.9 | 1.9 | 2.0 | 2.0 | 2.0 | 2.1 | 2.1 | 2.1 | 2.2 | 2.2 | 2.2 | |
Shares (%) | |||||||||||||||||||
Heating Oil – Normal Efficiency | 7.8 | 6.1 | 4.5 | 3.2 | 1.8 | 1.2 | 0.9 | 0.7 | 0.5 | 0.3 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 12.3 | 13.7 | 15.0 | 15.6 | 16.5 | 16.3 | 16.2 | 15.9 | 15.6 | 15.3 | 15.0 | 14.8 | 14.5 | 14.2 | 13.8 | 13.3 | 12.7 | 12.0 | |
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 | 0.4 | 0.4 | 0.4 | 0.4 | 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 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | |
Natural Gas – High Efficiency | 0.6 | 0.6 | 0.6 | 0.7 | 0.7 | 0.7 | 0.8 | 1.0 | 1.0 | 1.0 | 1.1 | 1.1 | 1.2 | 1.2 | 1.2 | 1.6 | 2.0 | 2.1 | |
Electric | 51.2 | 51.4 | 51.5 | 52.0 | 52.4 | 53.0 | 53.8 | 54.3 | 55.1 | 56.6 | 58.0 | 59.3 | 60.5 | 61.7 | 62.6 | 63.2 | 63.9 | 64.4 | |
Heat Pump | 2.1 | 2.2 | 2.3 | 2.4 | 2.5 | 2.6 | 2.7 | 2.8 | 2.8 | 2.9 | 3.0 | 3.0 | 3.1 | 3.2 | 3.3 | 3.3 | 3.4 | 3.5 | |
Other1 | 0.3 | 0.3 | 0.3 | 0.7 | 1.0 | 1.3 | 1.6 | 1.8 | 2.0 | 2.3 | 2.1 | 2.0 | 1.9 | 1.8 | 1.7 | 1.6 | 1.5 | 1.4 | |
Wood | 8.2 | 8.3 | 8.5 | 8.4 | 8.4 | 8.4 | 7.9 | 7.9 | 7.5 | 6.5 | 5.8 | 5.0 | 4.3 | 3.6 | 3.3 | 3.1 | 2.9 | 2.9 | |
Dual Systems | |||||||||||||||||||
Wood/Electric | 11.2 | 11.1 | 11.0 | 10.9 | 10.7 | 10.5 | 10.3 | 10.1 | 9.9 | 9.7 | 9.6 | 9.4 | 9.3 | 9.2 | 9.1 | 8.9 | 8.8 | 8.8 | |
Wood/Heating Oil | 4.8 | 4.7 | 4.7 | 4.6 | 4.6 | 4.5 | 4.4 | 4.3 | 4.2 | 4.2 | 4.1 | 4.0 | 4.0 | 3.9 | 3.9 | 3.8 | 3.8 | 3.8 | |
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 | 0.5 | 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 | 0.6 | 0.6 | 0.6 |