Residential Sector
Atlantic
Table 24: Apartments Heating System Stock by Heating System Type
  2000   2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
Total Apartment Heating System Stock (thousands) 175.0   176.3 177.8 179.6 182.6 184.5 186.5 189.0 191.3 193.5 195.7 198.3 201.5 205.9 208.5 210.5 213.4 215.4

Heating System Stock by Heating System Type (thousands)
Heating Oil – Normal Efficiency 39.9   37.0 34.5 32.0 29.8 27.1 24.3 21.6 19.2 16.2 13.4 11.2 9.5 8.4 6.0 4.6 3.1 1.5
Heating Oil – Medium Efficiency 36.8   40.3 43.4 45.9 48.3 50.2 52.0 53.3 54.2 54.8 55.2 55.1 54.8 54.2 54.2 52.9 51.6 50.8
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 0.4 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 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 0.9 0.9
Natural Gas – High Efficiency 1.1   1.1 1.2 1.3 1.3 1.4 1.7 2.0 2.1 2.2 2.3 2.5 2.6 2.7 2.7 3.2 4.1 4.5
Electric 64.8   65.6 66.3 67.6 69.8 72.2 75.0 78.2 81.9 86.6 91.7 97.0 102.6 109.0 114.6 119.7 125.3 129.6
Heat Pump 1.5   1.6 1.7 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.6 2.7 2.8 2.9 3.1 3.2 3.3
Other1 2.1   2.1 2.1 2.3 2.5 2.7 2.9 3.1 3.3 3.5 3.5 3.5 3.5 3.6 3.5 3.5 3.5 3.6
Wood 25.2   25.0 25.1 25.2 25.4 25.3 25.0 25.0 24.8 24.2 23.6 22.9 22.2 21.6 20.9 19.9 19.1 18.7

Dual Systems
Wood/Electric 1.2   1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.4 1.4 1.4 1.4 1.4 1.4 1.4
Wood/Heating Oil 0.8   0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.9 0.9
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 0.2 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

Shares (%)
Heating Oil – Normal Efficiency 22.8   21.0 19.4 17.8 16.3 14.7 13.0 11.4 10.0 8.4 6.8 5.6 4.7 4.1 2.9 2.2 1.5 0.7
Heating Oil – Medium Efficiency 21.0   22.9 24.4 25.6 26.5 27.2 27.9 28.2 28.3 28.3 28.2 27.8 27.2 26.3 26.0 25.2 24.2 23.6
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 0.2   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
Natural Gas – Medium Efficiency 0.5   0.5 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 0.4 0.4
Natural Gas – High Efficiency 0.6   0.6 0.7 0.7 0.7 0.8 0.9 1.1 1.1 1.1 1.2 1.3 1.3 1.3 1.3 1.5 1.9 2.1
Electric 37.0   37.2 37.3 37.6 38.2 39.1 40.2 41.4 42.8 44.8 46.9 48.9 50.9 53.0 55.0 56.9 58.7 60.2
Heat Pump 0.8   0.9 0.9 1.0 1.0 1.0 1.1 1.1 1.2 1.2 1.3 1.3 1.3 1.4 1.4 1.5 1.5 1.5
Other1 1.2   1.2 1.2 1.3 1.4 1.5 1.6 1.6 1.7 1.8 1.8 1.8 1.8 1.7 1.7 1.7 1.6 1.7
Wood 14.4   14.2 14.1 14.0 13.9 13.7 13.4 13.2 13.0 12.5 12.0 11.5 11.0 10.5 10.0 9.5 8.9 8.7

Dual Systems
Wood/Electric 0.7   0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7
Wood/Heating Oil 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
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 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1

Footnotes:

1) “Other” includes coal and propane.