|
Geothermal & Ground Source Heat Pumps 300% Efficient
|
Electricity Water/Air HP
(COP 3)
(cents/kWh)
|
Fuel Oil Regular
(60% eff.)
($/gal.)
|
Propane Regular
(90% eff.)
($/gal.)
|
Natural Gas Regular
(80% eff.)
($/therm)
|
Natural Gas Super Eff.
(90% eff.)
($/therm)
|
|
5.14
|
0.42
|
0.41
|
0.40
|
0.45
|
|
Air to Air Heat Pump 200% Efficient
|
Electricity Water/Air HP
(COP 3)
(cents/kWh)
|
Fuel Oil Regular
(60% eff.)
($/gal.)
|
Propane Regular
(90% eff.)
($/gal.)
|
Natural Gas Regular
(80% eff.)
($/therm)
|
Natural Gas Super Eff.
(90% eff.)
($/therm)
|
|
5.14
|
0.62
|
0.62
|
0.60
|
0.68
|
|
Electric Resistance 100% Efficient
|
Electricity Water/Air HP
(COP 3)
(cents/kWh)
|
Fuel Oil Regular
(60% eff.)
($/gal.)
|
Propane Regular
(90% eff.)
($/gal.)
|
Natural Gas Regular
(80% eff.)
($/therm)
|
Natural Gas Super Eff.
(90% eff.)
($/therm)
|
|
5.14
|
1.25
|
1.24
|
1.20
|
1.36
|