Do ductless heat pumps work at all temperatures?
Depending upon the particular model, a ductless heat pump will continue to provide low-cost heat down to -10C or -20C. When outside temperatures fall below the designated low-temperature cut-off, these units will suspend operation so to reduce excessive wear on the outside compressor. Once outdoor temperatures return above this set point, they automatically resume operation. A study of Halifax’s winter temperatures from 1998 to 2007 indicates that temperatures remained above -10C, on average, ninety-three per cent of the time and above -20C ninety-nine per cent.
