2000 | 2018 | 2019 | 2020 | 2021 | ||
---|---|---|---|---|---|---|
Heating System Stock Efficiencies by System Type (%) | ||||||
Heating Oil – Normal Efficiency | 60 | 60 | 60 | 60 | 60 | |
Heating Oil – Medium Efficiency | 78 | 78 | 78 | 78 | 78 | |
Heating Oil – High Efficiency | 85 | 85 | 85 | 85 | 85 | |
Natural Gas – Normal Efficiency | 62 | 62 | 62 | 62 | 62 | |
Natural Gas – Medium Efficiency | 79 | 80 | 80 | 80 | 80 | |
Natural Gas – High Efficiency | 90 | 90 | 90 | 90 | 90 | |
Electric | 100 | 100 | 100 | 100 | 100 | |
Heat Pump | 190 | 190 | 190 | 190 | 190 | |
Other1 | 50 | 50 | 50 | 50 | 50 | |
Wood | 50 | 50 | 50 | 50 | 50 | |
Dual Heating Systems Electric/Wood | ||||||
Electricity | 100 | 100 | 100 | 100 | 100 | |
Wood | 50 | 50 | 50 | 50 | 50 | |
Dual Heating Systems Heating Oil/Wood | ||||||
Heating Oil | 78 | 78 | 78 | 78 | 78 | |
Wood | 57 | 57 | 57 | 57 | 57 | |
Dual Heating Systems Electric/Natural Gas | ||||||
Electricity | 100 | 100 | 100 | 100 | 100 | |
Natural Gas | 79 | 80 | 80 | 80 | 80 | |
Dual Heating Systems Electric/Heating Oil | ||||||
Electricity | 100 | 100 | 100 | 100 | 100 | |
Heating Oil | 78 | 78 | 78 | 78 | 78 |