2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Total Apartments Heating System Stock (thousands) | 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 | |
Heating System Stock by Heating System Type (thousands) | |||||||||||||||||||
Heating Oil – Normal Efficiency | 6.1 | 5.5 | 4.9 | 4.3 | 3.7 | 3.1 | 2.6 | 2.1 | 1.5 | 0.9 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 6.2 | 6.8 | 7.5 | 7.7 | 8.2 | 8.3 | 8.3 | 8.3 | 8.3 | 8.3 | 8.3 | 8.2 | 8.1 | 7.9 | 7.6 | 7.3 | 6.9 | 6.4 | |
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 | 0.2 | 0.2 | 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 | 0.3 | 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 – High Efficiency | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.5 | 0.5 | 0.6 | 0.7 | 0.7 | 0.7 | 0.8 | 0.8 | 0.8 | 0.9 | 1.1 | 1.5 | 1.6 | |
Electric | 30.3 | 30.7 | 31.0 | 31.6 | 32.5 | 33.3 | 34.3 | 35.4 | 36.4 | 38.0 | 39.7 | 41.3 | 42.8 | 44.5 | 45.9 | 46.8 | 48.3 | 48.8 | |
Heat Pump | 0.6 | 0.6 | 0.7 | 0.7 | 0.7 | 0.8 | 0.8 | 0.9 | 0.9 | 0.9 | 1.0 | 1.0 | 1.1 | 1.1 | 1.2 | 1.2 | 1.3 | 1.3 | |
Other1 | 0.2 | 0.2 | 0.2 | 0.4 | 0.6 | 0.8 | 0.9 | 1.1 | 1.3 | 1.4 | 1.4 | 1.3 | 1.3 | 1.2 | 1.2 | 1.1 | 1.0 | 1.0 | |
Wood | 9.8 | 9.9 | 10.1 | 10.1 | 10.2 | 10.3 | 10.0 | 10.1 | 9.9 | 9.4 | 9.1 | 8.7 | 8.3 | 7.9 | 7.5 | 7.0 | 6.7 | 6.7 | |
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 | 0.3 | 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 | 0.1 | 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 | 0.2 | 0.2 | 0.2 | |
Shares (%) | |||||||||||||||||||
Heating Oil – Normal Efficiency | 11.2 | 9.9 | 8.7 | 7.7 | 6.5 | 5.4 | 4.4 | 3.5 | 2.6 | 1.5 | 0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 11.4 | 12.4 | 13.4 | 13.6 | 14.3 | 14.2 | 14.2 | 13.9 | 13.8 | 13.6 | 13.4 | 13.1 | 12.7 | 12.2 | 11.7 | 11.1 | 10.4 | 9.6 | |
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 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Normal Efficiency | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.3 | 0.3 | 0.2 | 0.2 | 0.2 | 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 | 0.5 | 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 | 0.7 | 0.7 | 0.7 | 0.8 | 0.9 | 1.1 | 1.1 | 1.2 | 1.2 | 1.3 | 1.3 | 1.3 | 1.3 | 1.7 | 2.2 | 2.4 | |
Electric | 55.3 | 55.6 | 55.6 | 56.2 | 56.5 | 57.4 | 58.6 | 59.5 | 60.7 | 62.6 | 64.6 | 66.3 | 67.7 | 69.1 | 70.4 | 71.4 | 72.5 | 73.2 | |
Heat Pump | 1.1 | 1.1 | 1.2 | 1.2 | 1.3 | 1.3 | 1.4 | 1.4 | 1.5 | 1.5 | 1.6 | 1.7 | 1.7 | 1.7 | 1.8 | 1.8 | 1.9 | 1.9 | |
Other1 | 0.3 | 0.3 | 0.3 | 0.7 | 1.0 | 1.3 | 1.6 | 1.8 | 2.1 | 2.3 | 2.2 | 2.1 | 2.0 | 1.9 | 1.8 | 1.7 | 1.6 | 1.4 | |
Wood | 18.0 | 18.0 | 18.1 | 18.0 | 17.7 | 17.7 | 17.1 | 17.0 | 16.6 | 15.5 | 14.8 | 13.9 | 13.1 | 12.3 | 11.5 | 10.8 | 10.1 | 10.0 | |
Dual Systems | |||||||||||||||||||
Wood/Electric | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | |
Wood/Heating Oil | 0.6 | 0.6 | 0.6 | 0.6 | 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 | 0.0 | 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 | 0.2 | 0.2 | 0.2 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |