Comparison of Electric Boiler and N Gas Boiler

DanielFranklinHO

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

That sounds about right.
This spreadsheet makes it easy.
www.eia.gov/tools/faqs/heatcalc.xls

Gordy

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

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

Math does not lie .