2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Total Single Attached Heating System Stock (thousands) | 28.8 | 28.9 | 29.1 | 29.2 | 29.4 | 29.6 | 29.9 | 30.3 | 30.8 | 31.3 | 31.8 | 32.7 | 33.4 | 34.2 | 35.4 | 36.2 | 37.1 | 38.0 | |
Heating System Stock by Heating System Type (thousands) | |||||||||||||||||||
Heating Oil – Normal Efficiency | 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 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 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 – 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 | 8.0 | 7.4 | 6.8 | 6.2 | 5.5 | 4.9 | 4.3 | 3.7 | 3.1 | 2.5 | 2.0 | 1.5 | 1.0 | 0.5 | 0.1 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 4.7 | 5.0 | 5.3 | 5.5 | 5.7 | 5.9 | 6.1 | 6.3 | 6.3 | 6.4 | 6.3 | 6.2 | 6.1 | 6.0 | 5.8 | 5.5 | 5.1 | 4.7 | |
Natural Gas – High Efficiency | 3.9 | 4.3 | 4.8 | 5.3 | 5.7 | 6.2 | 6.9 | 7.4 | 8.0 | 8.7 | 9.5 | 10.4 | 11.3 | 12.2 | 13.3 | 14.2 | 15.0 | 15.8 | |
Electric | 9.6 | 9.5 | 9.7 | 9.7 | 9.9 | 10.2 | 10.3 | 10.7 | 11.1 | 11.4 | 11.8 | 12.2 | 12.7 | 13.2 | 13.8 | 14.3 | 14.7 | 15.1 | |
Heat Pump | 0.6 | 0.7 | 0.7 | 0.7 | 0.8 | 0.8 | 0.8 | 0.9 | 0.9 | 1.0 | 1.0 | 1.1 | 1.1 | 1.2 | 1.3 | 1.4 | 1.4 | 1.5 | |
Other1 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | |
Wood | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 0.9 | 0.8 | 0.8 | 0.7 | 0.7 | 0.6 | 0.6 | 0.5 | 0.5 | 0.4 | 0.4 | 0.3 | 0.3 | |
Dual Systems | |||||||||||||||||||
Wood/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 | |
Wood/Heating Oil | 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/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 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Shares (%) | |||||||||||||||||||
Heating Oil – Normal Efficiency | 1.1 | 0.8 | 0.6 | 0.5 | 0.3 | 0.1 | 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 | 1.3 | 1.3 | 1.4 | 1.5 | 1.5 | 1.5 | 1.5 | 1.4 | 1.4 | 1.4 | 1.4 | 1.3 | 1.3 | 1.3 | 1.2 | 1.2 | 1.1 | 1.0 | |
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 | 27.9 | 25.7 | 23.4 | 21.1 | 18.8 | 16.5 | 14.3 | 12.1 | 10.0 | 8.1 | 6.3 | 4.6 | 3.0 | 1.6 | 0.4 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 16.4 | 17.4 | 18.2 | 18.9 | 19.5 | 19.9 | 20.3 | 20.7 | 20.5 | 20.3 | 19.8 | 19.1 | 18.4 | 17.4 | 16.3 | 15.1 | 13.7 | 12.3 | |
Natural Gas – High Efficiency | 13.5 | 15.0 | 16.4 | 18.0 | 19.5 | 21.0 | 22.9 | 24.3 | 25.9 | 27.8 | 29.7 | 31.8 | 33.8 | 35.7 | 37.7 | 39.1 | 40.4 | 41.7 | |
Electric | 33.1 | 33.0 | 33.3 | 33.1 | 33.7 | 34.3 | 34.5 | 35.2 | 35.9 | 36.4 | 36.9 | 37.5 | 38.0 | 38.6 | 39.1 | 39.4 | 39.6 | 39.8 | |
Heat Pump | 2.1 | 2.3 | 2.4 | 2.5 | 2.6 | 2.7 | 2.8 | 2.9 | 3.0 | 3.1 | 3.2 | 3.3 | 3.4 | 3.5 | 3.6 | 3.7 | 3.8 | 3.9 | |
Other1 | 1.0 | 1.0 | 1.0 | 0.9 | 0.9 | 0.9 | 0.9 | 0.8 | 0.8 | 0.8 | 0.7 | 0.7 | 0.6 | 0.6 | 0.5 | 0.5 | 0.5 | 0.4 | |
Wood | 3.6 | 3.5 | 3.3 | 3.4 | 3.3 | 3.1 | 2.8 | 2.6 | 2.4 | 2.2 | 2.0 | 1.7 | 1.5 | 1.3 | 1.2 | 1.0 | 0.9 | 0.8 | |
Dual Systems | |||||||||||||||||||
Wood/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 | |
Wood/Heating Oil | 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/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 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |