Posted by gbs on December 07, 2012 at 19:17:51 from (71.51.248.4):
In Reply to: O/T, Heat pumps posted by murray2 on December 07, 2012 at 17:24:22:
don't know about the ground source type but the air to air with the back up electric its good down to about 25 degrees without the heat strips ,sales gimmick was getting heat out of cold air??????? no such thing because the unit is a reverse flow air conditioner when the outside air temperature matches the refrigerant temperature in the outside coils it starts to freeze, the temperature can't raise in the inside coils because the refrigerant can't be warmed outside with air colder than the refrigerant ,no temperature differential no heat,i know they have cycle timers to elevate this problem but it still doesn't work unless you have a backup system ie electric heat strips or gas ,me personally from the headaches of having a heat pump i would purchase 2 separate units one for heat one for cooling
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