Looking at this with coal at 75% efficiency:
66,312,000 BTU's (required output)/ 0.75 = 88,416,000 BTU's (required input, or what you will need to burn)
88,416,000 BTU's / 25,000,000 BTU's/ton of coal = 3.54 tons of coal
Lets say you are paying a whopping $365 per ton for your anthracite delivered in bags
3.54 tons x $365 = $1,292 (vs. $2,176 for electricity)
Even when paying the highest going prices for coal, and burning it rather on the low side of efficiency, it offers significant annualised savings (year after year) vs. electricity.
Now if you can get your anthracite for $150/tom like those lucky Eastern PA folks, then you are talking real savings.
3.54 tons x $150/ton = $531 for the entire year. At that rate you can afford to be toasty all winter long and burn 4-5 tons.
Last edited by lsayre
on Mon Jan 10, 2011 8:03 pm, edited 3 times in total.