2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Total Heating System Stock (thousands) | 4,467.4 | 4,534.1 | 4,613.0 | 4,686.7 | 4,768.7 | 4,847.1 | 4,918.7 | 4,980.6 | 5,045.4 | 5,098.1 | 5,156.8 | 5,214.2 | |
Heating System Stock by Building Type (thousands) | |||||||||||||
Single Detached | 2,521.4 | 2,560.9 | 2,605.8 | 2,649.9 | 2,695.5 | 2,735.9 | 2,772.9 | 2,806.5 | 2,838.1 | 2,860.2 | 2,884.8 | 2,906.7 | |
Single Attached | 628.1 | 647.9 | 666.1 | 682.6 | 701.1 | 717.7 | 733.9 | 748.6 | 762.4 | 774.8 | 786.9 | 799.0 | |
Apartments | 1,293.0 | 1,300.5 | 1,316.2 | 1,329.2 | 1,346.9 | 1,368.1 | 1,386.4 | 1,399.9 | 1,419.2 | 1,437.4 | 1,459.2 | 1,482.7 | |
Mobile Homes | 24.9 | 24.8 | 24.9 | 25.0 | 25.2 | 25.4 | 25.5 | 25.6 | 25.7 | 25.8 | 25.8 | 25.9 | |
Shares (%) | |||||||||||||
Single Detached | 56.4 | 56.5 | 56.5 | 56.5 | 56.5 | 56.4 | 56.4 | 56.3 | 56.3 | 56.1 | 55.9 | 55.7 | |
Single Attached | 14.1 | 14.3 | 14.4 | 14.6 | 14.7 | 14.8 | 14.9 | 15.0 | 15.1 | 15.2 | 15.3 | 15.3 | |
Apartments | 28.9 | 28.7 | 28.5 | 28.4 | 28.2 | 28.2 | 28.2 | 28.1 | 28.1 | 28.2 | 28.3 | 28.4 | |
Mobile Homes | 0.6 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | |
Heating System Stock by Heating System Type (thousands) | |||||||||||||
Heating Oil – Normal Efficiency | 153.8 | 123.6 | 89.8 | 65.1 | 47.6 | 38.7 | 27.2 | 14.9 | 8.1 | 3.4 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 210.0 | 227.1 | 230.1 | 235.9 | 245.9 | 250.8 | 250.1 | 249.3 | 248.5 | 247.3 | 245.0 | 241.6 | |
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 | |
Natural Gas – Normal Efficiency | 1,355.8 | 1,275.9 | 1,188.7 | 1,092.9 | 987.8 | 877.4 | 764.6 | 652.3 | 544.8 | 438.8 | 341.8 | 249.3 | |
Natural Gas – Medium Efficiency | 869.0 | 930.7 | 997.9 | 1,055.3 | 1,108.6 | 1,152.8 | 1,190.9 | 1,224.0 | 1,240.5 | 1,247.4 | 1,236.5 | 1,221.2 | |
Natural Gas – High Efficiency | 694.1 | 778.3 | 884.1 | 988.9 | 1,106.4 | 1,225.0 | 1,356.2 | 1,476.4 | 1,603.5 | 1,724.3 | 1,858.4 | 1,988.1 | |
Electric | 673.2 | 673.2 | 678.5 | 683.7 | 690.5 | 700.3 | 713.0 | 726.5 | 744.9 | 764.3 | 785.8 | 806.9 | |
Heat Pump | 187.5 | 198.0 | 209.7 | 221.4 | 232.8 | 244.2 | 254.3 | 264.8 | 275.2 | 285.2 | 294.5 | 303.9 | |
Other1 | 56.5 | 56.3 | 56.5 | 56.7 | 57.5 | 59.2 | 61.8 | 65.3 | 70.1 | 76.0 | 83.1 | 91.0 | |
Wood | 42.0 | 40.9 | 42.6 | 46.4 | 46.7 | 50.2 | 48.9 | 51.7 | 50.8 | 48.8 | 46.0 | 43.2 | |
Dual Systems | |||||||||||||
Wood/Electric | 100.3 | 102.1 | 104.1 | 106.1 | 107.7 | 109.2 | 110.3 | 111.6 | 112.9 | 114.3 | 115.4 | 116.5 | |
Wood/Heating Oil | 91.4 | 93.1 | 94.9 | 96.8 | 98.3 | 99.6 | 100.7 | 101.9 | 103.1 | 104.4 | 105.4 | 106.5 | |
Natural Gas/Electric | 20.5 | 21.2 | 22.0 | 22.8 | 23.6 | 24.3 | 24.9 | 25.6 | 26.3 | 27.0 | 27.6 | 28.2 | |
Heating Oil/Electric | 13.3 | 13.8 | 14.2 | 14.7 | 15.1 | 15.5 | 15.9 | 16.3 | 16.7 | 17.1 | 17.4 | 17.7 | |
Shares (%) | |||||||||||||
Heating Oil – Normal Efficiency | 3.4 | 2.7 | 1.9 | 1.4 | 1.0 | 0.8 | 0.6 | 0.3 | 0.2 | 0.1 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 4.7 | 5.0 | 5.0 | 5.0 | 5.2 | 5.2 | 5.1 | 5.0 | 4.9 | 4.9 | 4.8 | 4.6 | |
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 | |
Natural Gas – Normal Efficiency | 30.3 | 28.1 | 25.8 | 23.3 | 20.7 | 18.1 | 15.5 | 13.1 | 10.8 | 8.6 | 6.6 | 4.8 | |
Natural Gas – Medium Efficiency | 19.5 | 20.5 | 21.6 | 22.5 | 23.2 | 23.8 | 24.2 | 24.6 | 24.6 | 24.5 | 24.0 | 23.4 | |
Natural Gas – High Efficiency | 15.5 | 17.2 | 19.2 | 21.1 | 23.2 | 25.3 | 27.6 | 29.6 | 31.8 | 33.8 | 36.0 | 38.1 | |
Electric | 15.1 | 14.8 | 14.7 | 14.6 | 14.5 | 14.4 | 14.5 | 14.6 | 14.8 | 15.0 | 15.2 | 15.5 | |
Heat Pump | 4.2 | 4.4 | 4.5 | 4.7 | 4.9 | 5.0 | 5.2 | 5.3 | 5.5 | 5.6 | 5.7 | 5.8 | |
Other1 | 1.3 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.3 | 1.3 | 1.4 | 1.5 | 1.6 | 1.7 | |
Wood | 0.9 | 0.9 | 0.9 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 0.9 | 0.8 | |
Dual Systems | |||||||||||||
Wood/Electric | 2.2 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.2 | 2.2 | 2.2 | 2.2 | 2.2 | 2.2 | |
Wood/Heating Oil | 2.0 | 2.1 | 2.1 | 2.1 | 2.1 | 2.1 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | |
Natural Gas/Electric | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | |
Heating Oil/Electric | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |