Have you tried to calculate whether you make more money from mining than you would save by switching to a more cost effective way of heating your home, without electricity?
I'm not sure I understand your question. My mining equipment is profitable on it's own the fact that it totally eliminates my need to burn natural gas to heat my house is just an extra fringe benefit to the tune of $100 /month in the winter months.
The assumption is that heating with gas/wood/coal whatever is cheaper than heating with electricity - is the profit made from mining including that - your point stands though.
