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Your Energy Costs

Your Energy > Your Energy Costs 

Comparing Energy Cost

Electricity

Water/Air HP

(COP 3)

(Cents/kWh)

Fuel Oil

Regular

(60% Eff.)

($/gal.)

Propane

Regular

(92% Eff.)

($/gal.)

Natural Gas

Regular

(75% Eff.)

($/therm.)

Natural Gas

Super Efficient

(92%) Eff.)

($/therm.)

Geothermal or Ground-Source heat Pump 300% Efficient

 

 

 

 

.0625

0.51

0.51

0.45

0.56

Air-to-Air Heat Pump 200% Efficient

 

 

 

 

.0625

0.76

0.77

0.68

0.84

Electric Resistance 100% Efficient

 

 

 

 

.0625

1.53

1.54

1.37

1.68


 

Fuel

Btu Heat

Content

Annual Season Operating Efficency

Electricity 

3,413 

Btu/kWh   

100%, 200%, 300%

#2 Fuel Oil  

140,000 

Btu/gallon

60%

Propane 

91,600

Btu/gallon

92%

Natural Gas

100,000

Btu/thermal 

75%, 92%

Wood  

16,000,000

Btu/ton

 60%


Formulas:

Alternate fuel price to electric rate conversion formula:

(Fuel Price) / (Fuel Eff.) x (3413 x Elec. Eff.) / (BTU Content) = Electric Rate

Example of $1.48/gallon propane to electricity with a super-efficient furnace:

(1.48) / (0.9) x (3413x100) / (91,600) = 6 cents per kWh

Electricity rate to alternate fuel price conversion formula:

(Electric Rate) x (Fuel Eff.) x (Btu Content)  /(3413xElec. Eff.) = Fuel Price

Example of 6.4 cents/kWh Electric Rate to #2 Fuel Oil with a regular furnace:

(6) x (0.6) x (140,000) / (3413x100) = $1.47 per gallon