2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Total Apartments Heating System Stock (thousands) | 82.8 | 83.8 | 84.8 | 85.9 | 87.3 | 88.2 | 89.3 | 90.5 | 91.8 | 92.8 | 93.7 | 94.7 | 95.9 | 98.1 | 99.3 | 100.5 | 102.0 | 103.6 | |
Heating System Stock by Heating System Type (thousands) | |||||||||||||||||||
Heating Oil – Normal Efficiency | 25.4 | 23.5 | 21.9 | 20.3 | 19.1 | 17.5 | 15.8 | 14.2 | 12.9 | 11.3 | 9.8 | 8.4 | 7.2 | 6.4 | 4.7 | 3.5 | 2.3 | 1.1 | |
Heating Oil – Medium Efficiency | 22.6 | 25.3 | 27.6 | 29.8 | 31.4 | 33.1 | 34.6 | 35.7 | 36.4 | 36.8 | 37.0 | 36.9 | 36.7 | 36.5 | 36.8 | 36.3 | 35.7 | 35.7 | |
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 | 0.1 | 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 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 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 | 0.4 | 0.4 | |
Natural Gas – High Efficiency | 0.5 | 0.5 | 0.5 | 0.6 | 0.6 | 0.7 | 0.8 | 0.9 | 1.0 | 1.0 | 1.1 | 1.2 | 1.2 | 1.3 | 1.3 | 1.4 | 2.0 | 2.3 | |
Electric | 20.4 | 20.8 | 20.9 | 21.2 | 21.9 | 22.7 | 23.7 | 25.0 | 26.7 | 28.8 | 31.1 | 33.6 | 36.2 | 39.3 | 42.2 | 45.1 | 48.0 | 50.6 | |
Heat Pump | 0.7 | 0.8 | 0.8 | 0.9 | 0.9 | 1.0 | 1.0 | 1.1 | 1.1 | 1.2 | 1.2 | 1.3 | 1.3 | 1.4 | 1.5 | 1.5 | 1.6 | 1.7 | |
Other1 | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 | 1.8 | 1.8 | 1.9 | 1.9 | 2.0 | 2.0 | 2.0 | 2.1 | 2.1 | 2.2 | |
Wood | 10.2 | 10.0 | 10.1 | 10.2 | 10.4 | 10.3 | 10.3 | 10.4 | 10.5 | 10.5 | 10.3 | 10.1 | 9.9 | 9.8 | 9.6 | 9.3 | 9.0 | 8.8 | |
Dual Systems | |||||||||||||||||||
Wood/Electric | 0.4 | 0.4 | 0.4 | 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 | |
Wood/Heating Oil | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | |
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 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 30.7 | 28.1 | 25.8 | 23.6 | 21.8 | 19.8 | 17.7 | 15.7 | 14.1 | 12.2 | 10.4 | 8.9 | 7.6 | 6.6 | 4.7 | 3.5 | 2.2 | 1.0 | |
Heating Oil – Medium Efficiency | 27.3 | 30.2 | 32.5 | 34.6 | 36.0 | 37.5 | 38.7 | 39.5 | 39.6 | 39.7 | 39.5 | 39.0 | 38.3 | 37.2 | 37.0 | 36.1 | 35.0 | 34.4 | |
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 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 | 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 | 0.5 | 0.5 | 0.4 | 0.4 | |
Natural Gas – High Efficiency | 0.6 | 0.6 | 0.6 | 0.7 | 0.7 | 0.8 | 0.9 | 1.0 | 1.1 | 1.1 | 1.2 | 1.3 | 1.3 | 1.3 | 1.3 | 1.4 | 2.0 | 2.2 | |
Electric | 24.7 | 24.8 | 24.7 | 24.7 | 25.1 | 25.7 | 26.6 | 27.6 | 29.1 | 31.1 | 33.2 | 35.4 | 37.7 | 40.1 | 42.5 | 44.9 | 47.0 | 48.8 | |
Heat Pump | 0.9 | 0.9 | 1.0 | 1.0 | 1.0 | 1.1 | 1.1 | 1.2 | 1.2 | 1.2 | 1.3 | 1.3 | 1.4 | 1.4 | 1.5 | 1.5 | 1.6 | 1.6 | |
Other1 | 2.0 | 2.0 | 2.0 | 1.9 | 1.9 | 1.9 | 1.9 | 1.9 | 1.9 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.1 | 2.1 | 2.0 | 2.2 | |
Wood | 12.3 | 11.9 | 11.9 | 11.9 | 11.9 | 11.7 | 11.6 | 11.5 | 11.5 | 11.3 | 11.0 | 10.7 | 10.3 | 10.0 | 9.6 | 9.2 | 8.8 | 8.5 | |
Dual Systems | |||||||||||||||||||
Wood/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 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | |
Wood/Heating Oil | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | |
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 | 0.0 | 0.0 | 0.0 | 0.0 | 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 |