2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Total Apartments Heating System Stock (thousands) | 5.8 | 5.9 | 6.3 | 6.4 | 6.7 | 6.9 | 7.0 | 7.2 | 7.4 | 7.6 | 7.6 | 8.0 | 8.2 | 8.4 | 8.7 | 8.8 | 9.2 | 9.3 | |
Heating System Stock by Heating System Type (thousands) | |||||||||||||||||||
Heating Oil – Normal Efficiency | 2.0 | 1.7 | 1.5 | 1.5 | 1.2 | 1.2 | 1.1 | 1.0 | 1.0 | 0.9 | 0.9 | 0.7 | 0.8 | 0.6 | 0.6 | 0.6 | 0.4 | 0.5 | |
Heating Oil – Medium Efficiency | 1.8 | 2.1 | 2.5 | 2.6 | 3.0 | 3.2 | 3.4 | 3.6 | 3.8 | 3.9 | 4.0 | 4.4 | 4.5 | 4.8 | 5.0 | 5.1 | 5.6 | 5.6 | |
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 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.2 | 0.2 | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 0.4 | 0.4 | 0.5 | 0.5 | 0.5 | 0.6 | 0.6 | 0.6 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.6 | 0.6 | |
Natural Gas – High Efficiency | 0.2 | 0.3 | 0.3 | 0.3 | 0.3 | 0.4 | 0.4 | 0.4 | 0.5 | 0.5 | 0.6 | 0.6 | 0.7 | 0.7 | 0.8 | 0.9 | 0.9 | 1.0 | |
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 | |
Heat Pump | 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 | |
Other1 | 0.6 | 0.6 | 0.6 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.9 | |
Wood | 0.3 | 0.3 | 0.3 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.5 | 0.5 | 0.5 | 0.5 | |
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 | 34.3 | 29.2 | 24.6 | 22.8 | 18.5 | 16.9 | 15.4 | 13.7 | 13.2 | 12.1 | 11.5 | 8.6 | 9.4 | 7.1 | 6.7 | 6.6 | 4.2 | 5.0 | |
Heating Oil – Medium Efficiency | 30.8 | 35.4 | 39.8 | 40.8 | 44.3 | 46.5 | 48.4 | 50.2 | 50.8 | 51.5 | 52.0 | 55.3 | 54.8 | 57.4 | 58.1 | 58.2 | 60.9 | 60.0 | |
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 | 5.7 | 5.4 | 5.1 | 4.9 | 4.6 | 4.3 | 4.1 | 3.8 | 3.4 | 3.0 | 2.6 | 2.1 | 1.7 | 1.3 | 1.0 | 0.7 | 0.5 | 0.3 | |
Natural Gas – Medium Efficiency | 6.9 | 7.2 | 7.4 | 7.7 | 8.0 | 8.3 | 8.7 | 9.0 | 9.0 | 9.3 | 9.2 | 8.8 | 8.6 | 8.3 | 7.9 | 7.6 | 7.0 | 6.6 | |
Natural Gas – High Efficiency | 4.2 | 4.4 | 4.5 | 4.8 | 5.1 | 5.4 | 5.7 | 6.0 | 6.4 | 7.0 | 7.7 | 8.1 | 8.5 | 8.9 | 9.2 | 9.9 | 10.3 | 11.0 | |
Electric | 3.3 | 3.2 | 3.1 | 3.1 | 3.0 | 2.9 | 2.7 | 2.7 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | |
Heat Pump | 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 | |
Other1 | 9.6 | 9.7 | 10.0 | 10.3 | 10.5 | 10.0 | 9.5 | 9.4 | 9.2 | 9.2 | 9.1 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | |
Wood | 5.2 | 5.5 | 5.4 | 5.7 | 6.0 | 5.7 | 5.4 | 5.4 | 5.3 | 5.3 | 5.2 | 5.2 | 5.2 | 5.3 | 5.3 | 5.2 | 5.3 | 5.2 | |
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 |