2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Total Apartments Heating System Stock (thousands) | 1426.5 | 1434.1 | 1443.7 | 1459.6 | 1479.6 | 1502.1 | 1524.6 | 1547.2 | 1570.2 | 1591.2 | 1611.9 | 1634.1 | 1657.2 | 1678.7 | 1701.9 | 1721.1 | 1744.3 | 1768.9 | |
Heating System Stock by Heating System Type (thousands) | |||||||||||||||||||
Heating Oil – Normal Efficiency | 68.2 | 55.5 | 37.5 | 22.5 | 7.7 | 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 | 149.6 | 154.8 | 164.0 | 164.9 | 165.9 | 165.1 | 163.3 | 161.3 | 160.0 | 158.8 | 157.8 | 156.8 | 155.7 | 153.8 | 151.0 | 146.8 | 140.6 | 132.3 | |
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 | 60.3 | 59.4 | 55.2 | 50.8 | 44.9 | 38.5 | 31.6 | 24.9 | 18.9 | 13.3 | 8.4 | 4.2 | 0.7 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 7.3 | 7.5 | 7.9 | 8.9 | 10.4 | 11.5 | 12.3 | 12.6 | 12.8 | 12.8 | 12.4 | 11.9 | 11.4 | 10.9 | 10.3 | 9.8 | 9.3 | 8.8 | |
Natural Gas – High Efficiency | 10.1 | 10.4 | 11.2 | 13.8 | 18.8 | 23.6 | 29.0 | 37.0 | 42.6 | 48.5 | 54.9 | 60.7 | 65.9 | 70.2 | 74.2 | 76.7 | 80.5 | 83.0 | |
Electric | 971.9 | 987.8 | 1009.1 | 1038.3 | 1067.8 | 1097.5 | 1126.6 | 1151.5 | 1176.2 | 1197.8 | 1220.6 | 1244.6 | 1269.2 | 1291.2 | 1315.0 | 1337.5 | 1364.1 | 1395.3 | |
Heat Pump | 8.4 | 8.7 | 9.1 | 9.5 | 10.1 | 10.5 | 10.8 | 11.1 | 11.5 | 12.0 | 12.4 | 12.8 | 13.2 | 13.7 | 14.3 | 14.7 | 15.2 | 15.8 | |
Other1 | 1.9 | 1.9 | 1.9 | 1.9 | 1.9 | 2.0 | 2.1 | 2.2 | 2.4 | 2.7 | 3.0 | 3.3 | 3.7 | 4.1 | 4.6 | 5.2 | 5.8 | 6.5 | |
Wood | 94.2 | 91.7 | 90.0 | 89.7 | 91.0 | 91.2 | 85.7 | 82.4 | 80.5 | 79.0 | 75.1 | 71.3 | 67.7 | 64.0 | 60.6 | 57.1 | 53.9 | 50.8 | |
Dual Systems | |||||||||||||||||||
Wood/Electric | 16.2 | 16.5 | 16.8 | 17.1 | 17.4 | 17.6 | 17.7 | 17.8 | 18.0 | 18.1 | 18.3 | 18.5 | 18.7 | 18.9 | 19.1 | 19.4 | 19.6 | 19.9 | |
Wood/Heating Oil | 6.6 | 6.8 | 6.9 | 7.0 | 7.1 | 7.2 | 7.3 | 7.3 | 7.4 | 7.4 | 7.5 | 7.6 | 7.6 | 7.7 | 7.8 | 7.9 | 8.0 | 8.1 | |
Natural Gas/Electric | 6.4 | 6.6 | 6.9 | 7.1 | 7.3 | 7.5 | 7.7 | 7.8 | 8.0 | 8.2 | 8.4 | 8.5 | 8.7 | 8.9 | 9.1 | 9.3 | 9.5 | 9.7 | |
Heating Oil/Electric | 25.4 | 26.3 | 27.3 | 28.2 | 29.2 | 30.0 | 30.6 | 31.1 | 31.8 | 32.5 | 33.2 | 33.9 | 34.6 | 35.3 | 36.0 | 36.8 | 37.7 | 38.6 | |
Shares (%) | |||||||||||||||||||
Heating Oil – Normal Efficiency | 4.8 | 3.9 | 2.6 | 1.5 | 0.5 | 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 | 10.5 | 10.8 | 11.4 | 11.3 | 11.2 | 11.0 | 10.7 | 10.4 | 10.2 | 10.0 | 9.8 | 9.6 | 9.4 | 9.2 | 8.9 | 8.5 | 8.1 | 7.5 | |
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 | 4.2 | 4.1 | 3.8 | 3.5 | 3.0 | 2.6 | 2.1 | 1.6 | 1.2 | 0.8 | 0.5 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 0.5 | 0.5 | 0.5 | 0.6 | 0.7 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.7 | 0.7 | 0.6 | 0.6 | 0.6 | 0.5 | 0.5 | |
Natural Gas – High Efficiency | 0.7 | 0.7 | 0.8 | 0.9 | 1.3 | 1.6 | 1.9 | 2.4 | 2.7 | 3.1 | 3.4 | 3.7 | 4.0 | 4.2 | 4.4 | 4.5 | 4.6 | 4.7 | |
Electric | 68.1 | 68.9 | 69.9 | 71.1 | 72.2 | 73.1 | 73.9 | 74.4 | 74.9 | 75.3 | 75.7 | 76.2 | 76.6 | 76.9 | 77.3 | 77.7 | 78.2 | 78.9 | |
Heat Pump | 0.6 | 0.6 | 0.6 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.9 | 0.9 | 0.9 | |
Other1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 0.3 | 0.3 | 0.4 | |
Wood | 6.6 | 6.4 | 6.2 | 6.1 | 6.1 | 6.1 | 5.6 | 5.3 | 5.1 | 5.0 | 4.7 | 4.4 | 4.1 | 3.8 | 3.6 | 3.3 | 3.1 | 2.9 | |
Dual Systems | |||||||||||||||||||
Wood/Electric | 1.1 | 1.1 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | |
Wood/Heating Oil | 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 | 0.5 | 0.5 | 0.5 | 0.5 | |
Natural Gas/Electric | 0.4 | 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 | 0.5 | 0.5 | 0.6 | |
Heating Oil/Electric | 1.8 | 1.8 | 1.9 | 1.9 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.1 | 2.1 | 2.1 | 2.1 | 2.1 | 2.1 | 2.2 | 2.2 |