|View single post by hvacdrd|
|Posted: Tue Jun 19th, 2007 03:18 am||
|Here is what I came up with converting to US gallons for oil & LP @ $3.02/gal (the LP price seems high, around here it is less than oil)
Oil = $2.69/ therm output at 80% efficiency (125,000 input =100,000 output)0.89gal
LP = $3.65/ therm output at 90% efficiency (111,111 input = 100,000 output) 1.21gal
Electric = $3.08/ therm output at 100% efficiency (29.3KwH)
Heat pump = $1.02/ therm output at COP=3
For a reference, in Michigan my total usage for heat, hot water & a gas dryer was 981 therms.
I'll have to do some homework on the heatpump option, it looks like design temp for your area(14'F to -22'F) is about 10'F lower than southern Michigan. Given the fact that you plan to have a wood stove I think it would be worth looking at.