I’m not a mechanical engineer but can assure you that a good Heat Pump can easily provide your 20-30 degree differential temperature. But you never asked at what cost. We went with an advanced system (SEER 19) heat pump and have absolutely never have a problem even when it’s 95 + degrees. Our highest electrical bill has been $95/ month. Bought unit in 2020 and asked for 12 year warranty (parts &labor). Most of the contractors did not hesitate. Did pay roughly $13k for the unit but peace of mind is important.
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