two heat pumps are nice. in temps between say 38 and up they do good job. as Joe said they dont run in colder than that and you need furnace below that anyway for basement.
We have had two for 10 years in our Suite. Use them all the time. Especially when elec is included in site rates. ha
Worth the extra cost IMHO.
Ours are not loud in or out but have heard others that are.
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