Quote:
Originally Posted by Olorin67
I know of 2 houses built in 1958 that have original GE heat pump systems that are still running.
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They really weren't intended to be used in colder climates like Wisconsin, as they don't work below 28 degrees F.
They're using them more around here for smaller homes, but they have back-up resistance elements, that automatically take over when the outside air is too cold.