I have an air source HP with electric furnace back up and a woodstove. I run the woodstove as much as is convenient and always when it gets so cold outside the electric furnace will be kicking on. Soon I hope to get solar hotwater heating going and would like to run a few loops of pex for radiant heating under the bedroom floors at night.
I hate your gas company so I wouldn't do it here but if you are already going to have gas I'd look for an air source heat pump with gas furnace backup.
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