Residential Sector
Atlantic
Table 24: Apartments Heating System Stock by Heating System Type
  1990   2012 2013 2014 2015
Total Apartment Heating System Stock (thousands) 154.6   200.7 207.5 208.9 212.5

Heating System Stock by Heating System Type (thousands)
Heating Oil – Normal Efficiency 68.6   8.3 8.0 5.5 3.4
Heating Oil – Medium Efficiency 3.9   37.4 38.1 39.2 41.6
Heating Oil – High Efficiency 0.0   0.0 0.0 0.0 0.0
Natural Gas – Normal Efficiency 0.4   0.1 0.1 0.1 0.1
Natural Gas – Medium Efficiency 0.0   1.0 1.0 1.0 1.0
Natural Gas – High Efficiency 0.1   2.5 3.7 3.8 4.0
Electric 52.8   128.1 126.5 129.0 131.3
Heat Pump 0.5   2.6 2.8 2.9 3.1
Other1 2.7   2.0 2.8 2.8 2.8
Wood 23.3   16.3 22.1 22.3 22.7

Dual Systems
Wood/Electric 1.2   1.4 1.4 1.4 1.4
Wood/Heating Oil 0.8   0.8 0.8 0.8 0.8
Natural Gas/Electric 0.0   0.0 0.0 0.0 0.0
Heating Oil/Electric 0.2   0.2 0.2 0.2 0.2

Shares (%)
Heating Oil – Normal Efficiency 44.4   4.1 3.9 2.6 1.6
Heating Oil – Medium Efficiency 2.5   18.6 18.3 18.7 19.6
Heating Oil – High Efficiency 0.0   0.0 0.0 0.0 0.0
Natural Gas – Normal Efficiency 0.3   0.1 0.0 0.0 0.0
Natural Gas – Medium Efficiency 0.0   0.5 0.5 0.5 0.5
Natural Gas – High Efficiency 0.1   1.3 1.8 1.8 1.9
Electric 34.2   63.8 61.0 61.7 61.8
Heat Pump 0.4   1.3 1.4 1.4 1.5
Other1 1.7   1.0 1.3 1.3 1.3
Wood 15.1   8.1 10.7 10.7 10.7

Dual Systems
Wood/Electric 0.8   0.7 0.7 0.7 0.7
Wood/Heating Oil 0.5   0.4 0.4 0.4 0.4
Natural Gas/Electric 0.0   0.0 0.0 0.0 0.0
Heating Oil/Electric 0.1   0.1 0.1 0.1 0.1

Footnotes:

1) “Other” includes coal and propane.