I'll make a run for it with just the stove going. House will probably be in the 65* to 68* range including far rooms which is right about my comfort zone indoors anyway. Electric heat - haven't turned a single room on yet this year so may as well keep plugging away. The problem with New England winters 'aint the cold, it's the humidity. Single digits or negative single digits doesn't qualify as "extreme cold", but add a little moisture to the air and tack some rime ice to your whiskers and it sure isn't comfortable.