Yas, there are heat pump systems designed to work at fairly low temps. Those aren't the ones they install in TX, where its just a cheap reversing valve on a sto

Yas, there are heat pump systems designed to work at fairly low temps. Those aren't the ones they install in TX, where its just a cheap reversing valve on a stock R410 system. AFAIK they don't even necessarily have aux heat (my mother's in FL didn't) and even if they do, after a decade or two it might not even work and no one would know.