In case I wasn't clear (and on re-reading, I may not have been) I mean it shouldn't be advocated for as a means of primary heating. Of course if you need it as

In case I wasn't clear (and on re-reading, I may not have been) I mean it shouldn't be advocated for as a means of primary heating. Of course if you need it as a back-up then get it. However, using it once in a while materially changes the economics involved in both mining (negatively) and heating/cooling (positively).