Residential Sector
Territories
Table 21: Heating System Stock by Building Type and Heating System Type
  1990   2010 2011 2012 2013 2014 2015
Total Heating System Stock (thousands) 26.1   37.3 39.2 40.0 41.2 42.2 42.5

Heating System Stock by Building Type (thousands)
Single Detached 13.4   20.1 21.6 22.1 22.7 23.2 23.4
Single Attached 4.7   6.4 6.8 6.9 7.1 7.2 7.2
Apartments 5.0   7.6 7.6 7.8 8.2 8.5 8.6
Mobile Homes 3.0   3.2 3.2 3.2 3.3 3.3 3.3

Shares (%)
Single Detached 51.4   53.9 55.2 55.2 55.0 55.0 55.0
Single Attached 17.9   17.2 17.3 17.2 17.2 17.0 17.0
Apartments 19.2   20.3 19.4 19.6 19.9 20.2 20.3
Mobile Homes 11.5   8.5 8.1 8.0 7.9 7.8 7.8

Heating System Stock by Heating System Type (thousands)
Heating Oil – Normal Efficiency 17.8   5.1 4.0 4.1 3.0 3.2 3.0
Heating Oil – Medium Efficiency 1.5   18.4 20.9 21.5 23.4 24.0 24.3
Heating Oil – High Efficiency 0.0   0.0 0.0 0.0 0.0 0.0 0.0
Natural Gas – Normal Efficiency 1.8   1.1 0.9 0.8 0.6 0.5 0.3
Natural Gas – Medium Efficiency 0.2   3.8 3.8 3.8 3.8 3.8 3.7
Natural Gas – High Efficiency 0.4   2.7 3.0 3.2 3.5 3.8 4.0
Electric 0.9   1.0 1.0 1.0 1.1 1.1 1.1
Heat Pump 0.0   0.0 0.0 0.0 0.0 0.0 0.0
Other1 2.2   3.3 3.5 3.6 3.7 3.8 3.8
Wood 1.3   1.9 2.0 2.0 2.1 2.2 2.2

Dual Systems
Wood/Electric 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
Natural Gas/Electric 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

Shares (%)
Heating Oil – Normal Efficiency 68.3   13.7 10.3 10.2 7.4 7.5 7.2
Heating Oil – Medium Efficiency 5.8   49.4 53.4 53.6 56.8 56.8 57.2
Heating Oil – High Efficiency 0.0   0.0 0.0 0.0 0.0 0.0 0.0
Natural Gas – Normal Efficiency 6.9   2.9 2.4 1.9 1.5 1.1 0.8
Natural Gas – Medium Efficiency 0.8   10.2 9.8 9.6 9.3 8.9 8.7
Natural Gas – High Efficiency 1.6   7.3 7.6 8.1 8.5 8.9 9.5
Electric 3.3   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
Other1 8.3   8.9 8.9 8.9 9.0 9.0 9.0
Wood 5.0   5.1 5.1 5.1 5.1 5.1 5.1

Dual Systems
Wood/Electric 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
Natural Gas/Electric 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

Footnotes:

1) “Other” includes coal and propane.