> Can someone confirm my math here?
Math seems pretty close, although I got $4.75 for electricity; and my
marginal electricity rate is a lot higher than $.12/kwh even though the
average rate is only a little higher than that.
However, kerosene seems kind of expensive, considering that I can buy
gasoline (including road tax) for about $3.
Is fuel oil any cheaper?
You might also want to take a peek at those infrastructure costs, especially
if you only plan to run the heat for a few days a year. Your electric
service might have an spare 60 amps of capacity, but mine doesn't; and the
cost to upgrade will buy a whole lotta propane. Having a bigger service
might also affect the minimum price during summer months (if you don't have
AC).
The water problem can also be eliminated by using a vented heater (which is
the only kind allowed here, if the shop is attached to a residence). But of
course that also lowers the efficiency.
-- Randall
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