|
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)
|
|
4.82
|
0.37
|
0.37
|
0.36
|
0.40
|
|
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)
|
|
4.82
|
0.56
|
0.56
|
0.54
|
0.61
|
|
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)
|
|
4.82
|
1.12
|
1.12
|
1.08
|
1.21
|