The cooling part was great all summer , actually running the system on "DRYING " worked for a good part of the summer pulling out the humidity.
The cost of use was very low and of course these units run very quietly.
As we used them for heating we have no issue with the actual heating ,, its even in the rooms , responds quickly , etc but I'm not sure about the efficiency heating with these heat pumps .
I,m sure that as the outside temp approaches zero you may want to be swapping over to the oil furnace as the more temp difference the less efficient these get .
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