2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Total Heating System Stock (thousands) | 1,159.1 | 1,186.3 | 1,217.5 | 1,252.4 | 1,286.7 | 1,322.5 | 1,360.1 | 1,400.4 | 1,438.3 | 1,465.1 | 1,493.6 | 1,516.5 | 1,541.5 | 1,573.0 | 1,606.8 | 1,645.5 | 1,678.6 | 1,704.0 | |
Heating System Stock by Building Type (thousands) | |||||||||||||||||||
Single Detached | 734.0 | 750.5 | 770.4 | 791.3 | 811.2 | 833.6 | 857.0 | 883.0 | 903.1 | 915.6 | 931.7 | 945.0 | 958.4 | 974.1 | 989.9 | 1,006.0 | 1,016.8 | 1,027.3 | |
Single Attached | 133.7 | 137.1 | 141.5 | 146.4 | 151.8 | 157.0 | 162.3 | 168.6 | 175.4 | 180.0 | 185.2 | 190.2 | 196.0 | 203.4 | 211.5 | 221.3 | 229.0 | 235.4 | |
Apartments | 243.7 | 250.2 | 255.9 | 263.6 | 271.4 | 278.2 | 285.7 | 292.0 | 301.9 | 310.7 | 316.9 | 320.7 | 325.7 | 333.1 | 342.0 | 353.8 | 367.8 | 375.7 | |
Mobile Homes | 47.7 | 48.6 | 49.7 | 51.0 | 52.3 | 53.7 | 55.1 | 56.8 | 58.0 | 58.8 | 59.8 | 60.6 | 61.5 | 62.4 | 63.4 | 64.4 | 65.0 | 65.7 | |
Shares (%) | |||||||||||||||||||
Single Detached | 63.3 | 63.3 | 63.3 | 63.2 | 63.0 | 63.0 | 63.0 | 63.1 | 62.8 | 62.5 | 62.4 | 62.3 | 62.2 | 61.9 | 61.6 | 61.1 | 60.6 | 60.3 | |
Single Attached | 11.5 | 11.6 | 11.6 | 11.7 | 11.8 | 11.9 | 11.9 | 12.0 | 12.2 | 12.3 | 12.4 | 12.5 | 12.7 | 12.9 | 13.2 | 13.4 | 13.6 | 13.8 | |
Apartments | 21.0 | 21.1 | 21.0 | 21.1 | 21.1 | 21.0 | 21.0 | 20.9 | 21.0 | 21.2 | 21.2 | 21.1 | 21.1 | 21.2 | 21.3 | 21.5 | 21.9 | 22.0 | |
Mobile Homes | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 3.9 | 3.9 | 3.9 | 3.9 | |
Heating System Stock by Heating System Type (thousands) | |||||||||||||||||||
Heating Oil – Normal Efficiency | 6.3 | 5.6 | 4.9 | 4.1 | 3.4 | 2.8 | 2.2 | 1.6 | 1.0 | 0.7 | 0.5 | 0.2 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 2.1 | 2.7 | 3.4 | 4.2 | 4.8 | 5.2 | 5.4 | 5.5 | 5.5 | 5.4 | 5.4 | 5.3 | 5.1 | 5.0 | 4.8 | 4.6 | 4.4 | 4.2 | |
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 | 541.5 | 502.6 | 460.3 | 419.6 | 365.0 | 315.0 | 266.6 | 221.4 | 182.1 | 144.7 | 115.1 | 85.7 | 58.6 | 34.8 | 14.9 | 6.1 | 2.5 | 0.9 | |
Natural Gas – Medium Efficiency | 489.2 | 536.1 | 588.2 | 636.8 | 692.3 | 743.2 | 791.2 | 832.8 | 856.3 | 871.7 | 868.4 | 862.7 | 854.7 | 842.2 | 825.4 | 800.1 | 768.8 | 734.2 | |
Natural Gas – High Efficiency | 55.4 | 70.2 | 89.0 | 108.8 | 134.4 | 161.1 | 189.8 | 223.3 | 267.1 | 303.1 | 354.4 | 401.8 | 450.1 | 504.1 | 559.4 | 616.2 | 667.8 | 714.9 | |
Electric | 18.5 | 21.3 | 22.4 | 27.6 | 33.8 | 40.5 | 48.4 | 57.3 | 66.1 | 77.6 | 86.6 | 96.2 | 106.9 | 119.2 | 132.9 | 147.8 | 163.4 | 177.1 | |
Heat Pump | 16.8 | 18.0 | 19.2 | 20.5 | 21.8 | 23.3 | 24.8 | 26.4 | 28.0 | 29.4 | 30.8 | 32.1 | 33.5 | 35.1 | 36.7 | 38.0 | 39.2 | 40.4 | |
Other1 | 16.8 | 16.8 | 16.9 | 17.0 | 17.1 | 17.1 | 17.1 | 17.1 | 17.0 | 16.7 | 16.4 | 16.0 | 15.7 | 15.4 | 15.1 | 14.8 | 14.4 | 13.9 | |
Wood | 1.8 | 1.7 | 1.7 | 1.6 | 1.6 | 1.5 | 1.3 | 1.2 | 1.2 | 1.2 | 1.1 | 1.1 | 1.0 | 1.0 | 0.9 | 0.9 | 0.9 | 0.8 | |
Dual Systems | |||||||||||||||||||
Wood/Electric | 1.5 | 1.5 | 1.6 | 1.6 | 1.7 | 1.7 | 1.8 | 1.8 | 1.9 | 1.9 | 2.0 | 2.0 | 2.1 | 2.1 | 2.2 | 2.2 | 2.2 | 2.3 | |
Wood/Heating Oil | 5.0 | 5.2 | 5.4 | 5.6 | 5.7 | 5.9 | 6.1 | 6.2 | 6.4 | 6.6 | 6.7 | 6.9 | 7.1 | 7.2 | 7.4 | 7.5 | 7.6 | 7.7 | |
Natural Gas/Electric | 4.2 | 4.4 | 4.6 | 4.8 | 5.0 | 5.2 | 5.4 | 5.6 | 5.8 | 6.0 | 6.2 | 6.4 | 6.6 | 6.8 | 7.0 | 7.2 | 7.4 | 7.5 | |
Heating Oil/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 | |
Shares (%) | |||||||||||||||||||
Heating Oil – Normal Efficiency | 0.5 | 0.5 | 0.4 | 0.3 | 0.3 | 0.2 | 0.2 | 0.1 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 0.2 | 0.2 | 0.3 | 0.3 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.2 | |
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 | 46.7 | 42.4 | 37.8 | 33.5 | 28.4 | 23.8 | 19.6 | 15.8 | 12.7 | 9.9 | 7.7 | 5.7 | 3.8 | 2.2 | 0.9 | 0.4 | 0.1 | 0.1 | |
Natural Gas – Medium Efficiency | 42.2 | 45.2 | 48.3 | 50.8 | 53.8 | 56.2 | 58.2 | 59.5 | 59.5 | 59.5 | 58.1 | 56.9 | 55.4 | 53.5 | 51.4 | 48.6 | 45.8 | 43.1 | |
Natural Gas – High Efficiency | 4.8 | 5.9 | 7.3 | 8.7 | 10.4 | 12.2 | 14.0 | 15.9 | 18.6 | 20.7 | 23.7 | 26.5 | 29.2 | 32.0 | 34.8 | 37.4 | 39.8 | 42.0 | |
Electric | 1.6 | 1.8 | 1.8 | 2.2 | 2.6 | 3.1 | 3.6 | 4.1 | 4.6 | 5.3 | 5.8 | 6.3 | 6.9 | 7.6 | 8.3 | 9.0 | 9.7 | 10.4 | |
Heat Pump | 1.5 | 1.5 | 1.6 | 1.6 | 1.7 | 1.8 | 1.8 | 1.9 | 1.9 | 2.0 | 2.1 | 2.1 | 2.2 | 2.2 | 2.3 | 2.3 | 2.3 | 2.4 | |
Other1 | 1.4 | 1.4 | 1.4 | 1.4 | 1.3 | 1.3 | 1.3 | 1.2 | 1.2 | 1.1 | 1.1 | 1.1 | 1.0 | 1.0 | 0.9 | 0.9 | 0.9 | 0.8 | |
Wood | 0.2 | 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 | 0.0 | |
Dual Systems | |||||||||||||||||||
Wood/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 | |
Wood/Heating Oil | 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 | 0.5 | 0.5 | 0.5 | 0.5 | |
Natural Gas/Electric | 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 | 0.4 | 0.4 | 0.4 | |
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 |