Your electric heat pump can pull heat out of the air until the outside temperature gets down to 34 or so then the auxilliary electric heat strips come on. Its like heating your house with a very large toaster. Your heat pump will be very economical. Remember that whether you heat with gas or a heat pump your house will be at the temperature you set. 70 is 70. What IS different is the temperature of the air coming out of the vent.
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