Very sensible comment. The risk of grid failure in places where things get below zero often, but not to warrant extreme precaution are high. If you have a pla

Very sensible comment. The risk of grid failure in places where things get below zero often, but not to warrant extreme precaution are high. If you have a place where you get few days below zero a year, it's not that unlikely that once in a decade it may get to -20 for a week or so, and then you are screwed.