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Comparison of Electric Boiler and N Gas Boiler

I do not wish to violate the rule about discussing pricing - does that apply to comparing the cost of running an electric boiler vs an NG boiler? Electricity here costs $0.11931/kWH and NG costs $0.2674/M cubed.

Here is how I calculate how my electric boiler compares with an hypothetical 80% efficient NG boiler:
Over the past 2 weeks my electric boiler consumed 672 kWH at $0.11931/kWH = $80.18.

I convert it to NG as follows: 227.78 kWH = 1 Gj = 26.137 M cubed NG
NG here costs $.2674/M cubed.
So, 672 kWH = (26.137/227.78) X 672 = 77 M3 @ $.2674/M3 = $20.59/.8 efficiency = $25.74
So over 14 days I think my electric boiler has cost $80.18 - $25.74 = $54.44 more than an 80% eff NG boiler would have.

Did I do the math correctly?
Thank you for confirming.


  • Zman
    Zman Member Posts: 7,553
    That sounds about right.
    This spreadsheet makes it easy.
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
  • Gordy
    Gordy Member Posts: 9,546
    edited November 2014
    The only thing I see is does cost per kilowatt reflect end user fees? In other words are you taking the total bill divided by used kilowatts? Same applies to your NG cost per CF.
  • DanielFranklinHO
    DanielFranklinHO Member Posts: 10
    I am doing the calculation for the amount used without any of the fixed costs that the utilities add on because I pay those anyways for both electric and gas. The 672 kWH amount is from a dedicated meter measuring just the boiler.
  • Rich_49
    Rich_49 Member Posts: 2,766
    Math does not lie .
    You didn't get what you didn't pay for and it will never be what you thought it would .
    Langans Plumbing & Heating LLC
    Serving most of New Jersey, Eastern Pa .
    Consultation, Design & Installation anywhere
    Rich McGrath 732-581-3833